Global River Water Quality Archive (GRQA)
Abstract
A major problem related to large-scale water quality modeling has been the lack of available observation data with a good spatiotemporal coverage. This has affected the reproducibility of previous studies and the potential improvement of existing models. In addition to the observation data itself, insufficient or poor quality metadata has also discouraged researchers to integrate the already available datasets. Therefore, improving both the availability and quality of open water quality data woould increase the potential to implement predictive modeling on a global scale. We aim to address the aforementioned issues by presenting the new Global River Water Quality Archive (GRQA) by integrating data from five existing global and regional sources: Canadian Environmental Sustainability Indicators program (CESI), Global Freshwater Quality Database (GEMStat), GLObal RIver Chemistry database (GLORICH), European Environment Agency (Waterbase) and USGS Water Quality Portal (WQP). The resulting dataset covering the timeframe 1898 - 2023 contains a total of over 17 million observations for 43 different forms of some of the most important water quality parameters, focusing on nutrients, carbon, oxygen and sediments. Supplementary metadata and statistics are provided with the observation time series to improve the usability of the dataset. GRQA data processing scripts are available at https://doi.org/10.5281/zenodo.5082147. Last update: 2025-05-04 Changes since GRQA_v1.3 The updated dataset now includes the observations from the latest versions of GEMStat and Waterbase. These additions extend the time series to 2023 in many sites, particularly in Europe. An overview of all the files in the dataset can be found in README_v1.4.md. Statistical overview of all 43 parameters is given in the data catalog file GRQA_data_catalog_v1.4.pdf. For more information about the development of this dataset look for Virro, H., Amatulli, G., Kmoch, A., Shen, L., and Uuemaa, E.: GRQA: Global River Water Quality Archive, Earth Syst. Sci. Data, 13, 5483–5507, https://doi.org/10.5194/essd-13-5483-2021, 2021.
Full text
1 Data catalog of Global River Water Quality Archive (GRQA) v1.4 Parameter overview figures Biochemical Oxygen Demand (BOD) ............................................................................ 12 Monthly time series availability of BOD observation values ........................................ 12 Box plot of BOD observation values .......................................................................... 12 Monthly time series continuity of BOD observation values ......................................... 13 Distribution of BOD observation values ...................................................................... 13 Spatial distribution of yearly median of BOD observation values ................................ 14 Spatial distribution of BOD observation values .......................................................... 14 Temporal distribution of BOD observation values ...................................................... 15 Biochemical Oxygen Demand (BOD5) (BOD5) ............................................................. 15 Monthly time series availability of BOD5 observation values ...................................... 15 Box plot of BOD5 observation values......................................................................... 16 Monthly time series continuity of BOD5 observation values ....................................... 16 Distribution of BOD5 observation values .................................................................... 17 Spatial distribution of yearly median of BOD5 observation values .............................. 17 Spatial distribution of BOD5 observation values ........................................................ 18 Temporal distribution of BOD5 observation values .................................................... 18 Biochemical Oxygen Demand (BOD7) (BOD7) ............................................................. 19 Monthly time series availability of BOD7 observation values ...................................... 19 Box plot of BOD7 observation values......................................................................... 19 Monthly time series continuity of BOD7 observation values ....................................... 20 Distribution of BOD7 observation values .................................................................... 20 Spatial distribution of yearly median of BOD7 observation values .............................. 21 Spatial distribution of BOD7 observation values ........................................................ 21 Temporal distribution of BOD7 observation values .................................................... 22 Chemical Oxygen Demand (COD) ................................................................................ 22 Monthly time series availability of COD observation values ....................................... 22 Box plot of COD observation values .......................................................................... 23 Monthly time series continuity of COD observation values ......................................... 23
2 Distribution of COD observation values ..................................................................... 24 Spatial distribution of yearly median of COD observation values ............................... 24 Spatial distribution of COD observation values .......................................................... 25 Temporal distribution of COD observation values ...................................................... 25 Chemical Oxygen Demand (Cr) (CODCr) ...................................................................... 26 Monthly time series availability of CODCr observation values .................................... 26 Box plot of CODCr observation values ....................................................................... 26 Monthly time series continuity of CODCr observation values ..................................... 27 Distribution of CODCr observation values .................................................................. 27 Spatial distribution of yearly median of CODCr observation values ............................ 28 Spatial distribution of CODCr observation values ...................................................... 28 Temporal distribution of CODCr observation values .................................................. 29 Chemical Oxygen Demand (Mn) (CODMn) ................................................................... 29 Monthly time series availability of CODMn observation values................................... 29 Box plot of CODMn observation values ..................................................................... 30 Monthly time series continuity of CODMn observation values .................................... 30 Distribution of CODMn observation values................................................................. 31 Spatial distribution of yearly median of CODMn observation values .......................... 31 Spatial distribution of CODMn observation values ..................................................... 32 Temporal distribution of CODMn observation values ................................................. 32 Total Dissolved Carbon (DC) ......................................................................................... 33 Monthly time series availability of DC observation values .......................................... 33 Box plot of DC observation values ............................................................................. 33 Monthly time series continuity of DC observation values............................................ 34 Distribution of DC observation values ........................................................................ 34 Spatial distribution of yearly median of DC observation values .................................. 35 Spatial distribution of DC observation values ............................................................. 35 Temporal distribution of DC observation values ......................................................... 36 Dissolved Inorganic Carbon (DIC) ................................................................................. 36 Monthly time series availability of DIC observation values ......................................... 36 Box plot of DIC observation values ............................................................................ 37 Monthly time series continuity of DIC observation values........................................... 37 Distribution of DIC observation values ....................................................................... 38
3 Spatial distribution of yearly median of DIC observation values ................................. 38 Spatial distribution of DIC observation values ............................................................ 39 Temporal distribution of DIC observation values ........................................................ 39 Dissolved Inorganic Nitrogen (DIN) ............................................................................... 40 Monthly time series availability of DIN observation values ......................................... 40 Box plot of DIN observation values ............................................................................ 40 Monthly time series continuity of DIN observation values........................................... 41 Distribution of DIN observation values ....................................................................... 41 Spatial distribution of yearly median of DIN observation values ................................. 42 Spatial distribution of DIN observation values ............................................................ 42 Temporal distribution of DIN observation values ........................................................ 43 Dissolved Inorganic Phosphorus (DIP) .......................................................................... 43 Monthly time series availability of DIP observation values ......................................... 43 Box plot of DIP observation values ............................................................................ 44 Monthly time series continuity of DIP observation values ........................................... 44 Distribution of DIP observation values ....................................................................... 45 Spatial distribution of yearly median of DIP observation values ................................. 45 Spatial distribution of DIP observation values ............................................................ 46 Temporal distribution of DIP observation values ........................................................ 46 Dissolved Kjeldahl Nitrogen (DKN) ................................................................................ 47 Monthly time series availability of DKN observation values ........................................ 47 Box plot of DKN observation values ........................................................................... 47 Monthly time series continuity of DKN observation values ......................................... 48 Distribution of DKN observation values ...................................................................... 48 Spatial distribution of yearly median of DKN observation values ................................ 49 Spatial distribution of DKN observation values ........................................................... 49 Temporal distribution of DKN observation values....................................................... 50 Dissolved Oxygen (DO) ................................................................................................. 50 Monthly time series availability of DO observation values .......................................... 50 Box plot of DO observation values ............................................................................. 51 Monthly time series continuity of DO observation values ........................................... 51 Distribution of DO observation values ........................................................................ 52 Spatial distribution of yearly median of DO observation values .................................. 52
4 Spatial distribution of DO observation values ............................................................. 53 Temporal distribution of DO observation values ......................................................... 53 Dissolved Organic Carbon (DOC) ................................................................................. 54 Monthly time series availability of DOC observation values ....................................... 54 Box plot of DOC observation values .......................................................................... 54 Monthly time series continuity of DOC observation values ......................................... 55 Distribution of DOC observation values ..................................................................... 55 Spatial distribution of yearly median of DOC observation values ............................... 56 Spatial distribution of DOC observation values .......................................................... 56 Temporal distribution of DOC observation values ...................................................... 57 Dissolved Organic Nitrogen (DON) ................................................................................ 57 Monthly time series availability of DON observation values ....................................... 57 Box plot of DON observation values .......................................................................... 58 Monthly time series continuity of DON observation values ......................................... 58 Distribution of DON observation values ..................................................................... 59 Spatial distribution of yearly median of DON observation values ............................... 59 Spatial distribution of DON observation values .......................................................... 60 Temporal distribution of DON observation values ...................................................... 60 Dissolved Organic Phosphorus (DOP) .......................................................................... 61 Monthly time series availability of DOP observation values ........................................ 61 Box plot of DOP observation values .......................................................................... 61 Monthly time series continuity of DOP observation values ......................................... 62 Distribution of DOP observation values ...................................................................... 62 Spatial distribution of yearly median of DOP observation values ................................ 63 Spatial distribution of DOP observation values .......................................................... 63 Temporal distribution of DOP observation values ...................................................... 64 Dissolved Oxygen Saturation (DOSAT) ......................................................................... 64 Monthly time series availability of DOSAT observation values ................................... 64 Box plot of DOSAT observation values ...................................................................... 65 Monthly time series continuity of DOSAT observation values .................................... 65 Distribution of DOSAT observation values ................................................................. 66 Spatial distribution of yearly median of DOSAT observation values ........................... 66 Spatial distribution of DOSAT observation values ...................................................... 67
5 Temporal distribution of DOSAT observation values .................................................. 67 Ammonia Nitrogen (NH3N)............................................................................................ 68 Monthly time series availability of NH3N observation values ...................................... 68 Box plot of NH3N observation values......................................................................... 68 Monthly time series continuity of NH3N observation values ....................................... 69 Distribution of NH3N observation values .................................................................... 69 Spatial distribution of yearly median of NH3N observation values .............................. 70 Spatial distribution of NH3N observation values ........................................................ 70 Temporal distribution of NH3N observation values .................................................... 71 Ammonium Nitrogen (NH4N) ......................................................................................... 71 Monthly time series availability of NH4N observation values ...................................... 71 Box plot of NH4N observation values......................................................................... 72 Monthly time series continuity of NH4N observation values ....................................... 72 Distribution of NH4N observation values .................................................................... 73 Spatial distribution of yearly median of NH4N observation values .............................. 73 Spatial distribution of NH4N observation values ........................................................ 74 Temporal distribution of NH4N observation values .................................................... 74 Nitrite Nitrogen (NO2N) ................................................................................................. 75 Monthly time series availability of NO2N observation values ..................................... 75 Box plot of NO2N observation values ........................................................................ 75 Monthly time series continuity of NO2N observation values ....................................... 76 Distribution of NO2N observation values ................................................................... 76 Spatial distribution of yearly median of NO2N observation values ............................. 77 Spatial distribution of NO2N observation values ........................................................ 77 Temporal distribution of NO2N observation values .................................................... 78 Nitrate Nitrogen (NO3N) ................................................................................................ 78 Monthly time series availability of NO3N observation values ..................................... 78 Box plot of NO3N observation values ........................................................................ 79 Monthly time series continuity of NO3N observation values ....................................... 79 Distribution of NO3N observation values ................................................................... 80 Spatial distribution of yearly median of NO3N observation values ............................. 80 Spatial distribution of NO3N observation values ........................................................ 81 Temporal distribution of NO3N observation values .................................................... 81
6 Particulate Carbon (PC) ................................................................................................ 82 Monthly time series availability of PC observation values .......................................... 82 Box plot of PC observation values ............................................................................. 82 Monthly time series continuity of PC observation values ............................................ 83 Distribution of PC observation values ........................................................................ 83 Spatial distribution of yearly median of PC observation values .................................. 84 Spatial distribution of PC observation values ............................................................. 84 Temporal distribution of PC observation values ......................................................... 85 pH (pH) ......................................................................................................................... 85 Monthly time series availability of pH observation values ........................................... 85 Box plot of pH observation values .............................................................................. 86 Monthly time series continuity of pH observation values ............................................ 86 Distribution of pH observation values ......................................................................... 87 Spatial distribution of yearly median of pH observation values ................................... 87 Spatial distribution of pH observation values .............................................................. 88 Temporal distribution of pH observation values ......................................................... 88 Particulate Inorganic Carbon (PIC) ................................................................................ 89 Monthly time series availability of PIC observation values ......................................... 89 Box plot of PIC observation values ............................................................................ 89 Monthly time series continuity of PIC observation values ........................................... 90 Distribution of PIC observation values ....................................................................... 90 Spatial distribution of yearly median of PIC observation values ................................. 91 Spatial distribution of PIC observation values ............................................................ 91 Temporal distribution of PIC observation values ........................................................ 92 Particulate Nitrogen (PN) .............................................................................................. 92 Monthly time series availability of PN observation values .......................................... 92 Box plot of PN observation values ............................................................................. 93 Monthly time series continuity of PN observation values ............................................ 93 Distribution of PN observation values ........................................................................ 94 Spatial distribution of yearly median of PN observation values .................................. 94 Spatial distribution of PN observation values ............................................................. 95 Temporal distribution of PN observation values ......................................................... 95 Particulate Organic Carbon (POC) ................................................................................ 96
7 Monthly time series availability of POC observation values ........................................ 96 Box plot of POC observation values .......................................................................... 96 Monthly time series continuity of POC observation values ......................................... 97 Distribution of POC observation values ...................................................................... 97 Spatial distribution of yearly median of POC observation values ................................ 98 Spatial distribution of POC observation values .......................................................... 98 Temporal distribution of POC observation values ...................................................... 99 Particulate Organic Nitrogen (PON) .............................................................................. 99 Monthly time series availability of PON observation values ........................................ 99 Box plot of PON observation values ........................................................................ 100 Monthly time series continuity of PON observation values ....................................... 100 Distribution of PON observation values .................................................................... 101 Spatial distribution of yearly median of PON observation values .............................. 101 Spatial distribution of PON observation values ........................................................ 102 Temporal distribution of PON observation values .................................................... 102 Particulate Organic Phosphorus (POP) ....................................................................... 103 Monthly time series availability of POP observation values ...................................... 103 Box plot of POP observation values ......................................................................... 103 Monthly time series continuity of POP observation values ....................................... 104 Distribution of POP observation values .................................................................... 104 Spatial distribution of yearly median of POP observation values .............................. 105 Spatial distribution of POP observation values ......................................................... 105 Temporal distribution of POP observation values..................................................... 106 Total Ammonia Nitrogen (TAN) ................................................................................... 106 Monthly time series availability of TAN observation values ...................................... 106 Box plot of TAN observation values ......................................................................... 107 Monthly time series continuity of TAN observation values ........................................ 107 Distribution of TAN observation values .................................................................... 108 Spatial distribution of yearly median of TAN observation values .............................. 108 Spatial distribution of TAN observation values ......................................................... 109 Temporal distribution of TAN observation values ..................................................... 109 Total Carbon (TC) ....................................................................................................... 110 Monthly time series availability of TC observation values......................................... 110
8 Box plot of TC observation values ........................................................................... 110 Monthly time series continuity of TC observation values .......................................... 111 Distribution of TC observation values....................................................................... 111 Spatial distribution of yearly median of TC observation values................................. 112 Spatial distribution of TC observation values ........................................................... 112 Temporal distribution of TC observation values ....................................................... 113 Total Dissolved Nitrogen (TDN) ................................................................................... 113 Monthly time series availability of TDN observation values ...................................... 113 Box plot of TDN observation values ......................................................................... 114 Monthly time series continuity of TDN observation values ....................................... 114 Distribution of TDN observation values .................................................................... 115 Spatial distribution of yearly median of TDN observation values .............................. 115 Spatial distribution of TDN observation values ......................................................... 116 Temporal distribution of TDN observation values ..................................................... 116 Total Dissolved Phosphorus (TDP) ............................................................................. 117 Monthly time series availability of TDP observation values ...................................... 117 Box plot of TDP observation values ......................................................................... 117 Monthly time series continuity of TDP observation values ........................................ 118 Distribution of TDP observation values .................................................................... 118 Spatial distribution of yearly median of TDP observation values .............................. 119 Spatial distribution of TDP observation values ......................................................... 119 Temporal distribution of TDP observation values ..................................................... 120 Water Temperature (TEMP) ........................................................................................ 120 Monthly time series availability of TEMP observation values ................................... 120 Box plot of TEMP observation values ...................................................................... 121 Monthly time series continuity of TEMP observation values ..................................... 121 Distribution of TEMP observation values ................................................................. 122 Spatial distribution of yearly median of TEMP observation values ........................... 122 Spatial distribution of TEMP observation values ...................................................... 123 Temporal distribution of TEMP observation values .................................................. 123 Total Inorganic Carbon (TIC) ....................................................................................... 124 Monthly time series availability of TIC observation values ........................................ 124 Box plot of TIC observation values .......................................................................... 124
9 Monthly time series continuity of TIC observation values ......................................... 125 Distribution of TIC observation values ...................................................................... 125 Spatial distribution of yearly median of TIC observation values................................ 126 Spatial distribution of TIC observation values .......................................................... 126 Temporal distribution of TIC observation values ...................................................... 127 Total Inorganic Nitrogen (TIN) ..................................................................................... 127 Monthly time series availability of TIN observation values ........................................ 127 Box plot of TIN observation values .......................................................................... 128 Monthly time series continuity of TIN observation values ......................................... 128 Distribution of TIN observation values ...................................................................... 129 Spatial distribution of yearly median of TIN observation values................................ 129 Spatial distribution of TIN observation values .......................................................... 130 Temporal distribution of TIN observation values ...................................................... 130 Total Inorganic Phosphorus (TIP) ................................................................................ 131 Monthly time series availability of TIP observation values ........................................ 131 Box plot of TIP observation values ........................................................................... 131 Monthly time series continuity of TIP observation values ......................................... 132 Distribution of TIP observation values ...................................................................... 132 Spatial distribution of yearly median of TIP observation values ................................ 133 Spatial distribution of TIP observation values ........................................................... 133 Temporal distribution of TIP observation values ...................................................... 134 Total Kjeldahl Nitrogen (TKN) ...................................................................................... 134 Monthly time series availability of TKN observation values ...................................... 134 Box plot of TKN observation values ......................................................................... 135 Monthly time series continuity of TKN observation values ........................................ 135 Distribution of TKN observation values .................................................................... 136 Spatial distribution of yearly median of TKN observation values .............................. 136 Spatial distribution of TKN observation values ......................................................... 137 Temporal distribution of TKN observation values ..................................................... 137 Total Nitrogen (TN) ..................................................................................................... 138 Monthly time series availability of TN observation values......................................... 138 Box plot of TN observation values ........................................................................... 138 Monthly time series continuity of TN observation values .......................................... 139
16 Box plot of BOD5 observation values Monthly time series continuity of BOD5 observation values
17 Distribution of BOD5 observation values Spatial distribution of yearly median of BOD5 observation values
18 Spatial distribution of BOD5 observation values Temporal distribution of BOD5 observation values
19 Biochemical Oxygen Demand (BOD7) (BOD7) Monthly time series availability of BOD7 observation values Box plot of BOD7 observation values
20 Monthly time series continuity of BOD7 observation values Distribution of BOD7 observation values
21 Spatial distribution of yearly median of BOD7 observation values Spatial distribution of BOD7 observation values
22 Temporal distribution of BOD7 observation values Chemical Oxygen Demand (COD) Monthly time series availability of COD observation values
23 Box plot of COD observation values Monthly time series continuity of COD observation values
24 Distribution of COD observation values Spatial distribution of yearly median of COD observation values
25 Spatial distribution of COD observation values Temporal distribution of COD observation values
32 Spatial distribution of CODMn observation values Temporal distribution of CODMn observation values
33 Total Dissolved Carbon (DC) Monthly time series availability of DC observation values Box plot of DC observation values
34 Monthly time series continuity of DC observation values Distribution of DC observation values
35 Spatial distribution of yearly median of DC observation values Spatial distribution of DC observation values
36 Temporal distribution of DC observation values Dissolved Inorganic Carbon (DIC) Monthly time series availability of DIC observation values
37 Box plot of DIC observation values Monthly time series continuity of DIC observation values
38 Distribution of DIC observation values Spatial distribution of yearly median of DIC observation values
39 Spatial distribution of DIC observation values Temporal distribution of DIC observation values
40 Dissolved Inorganic Nitrogen (DIN) Monthly time series availability of DIN observation values Box plot of DIN observation values
41 Monthly time series continuity of DIN observation values Distribution of DIN observation values
48 Monthly time series continuity of DKN observation values Distribution of DKN observation values
49 Spatial distribution of yearly median of DKN observation values Spatial distribution of DKN observation values
50 Temporal distribution of DKN observation values Dissolved Oxygen (DO) Monthly time series availability of DO observation values
51 Box plot of DO observation values Monthly time series continuity of DO observation values
52 Distribution of DO observation values Spatial distribution of yearly median of DO observation values
53 Spatial distribution of DO observation values Temporal distribution of DO observation values
54 Dissolved Organic Carbon (DOC) Monthly time series availability of DOC observation values Box plot of DOC observation values
55 Monthly time series continuity of DOC observation values Distribution of DOC observation values
56 Spatial distribution of yearly median of DOC observation values Spatial distribution of DOC observation values
57 Temporal distribution of DOC observation values Dissolved Organic Nitrogen (DON) Monthly time series availability of DON observation values
64 Temporal distribution of DOP observation values Dissolved Oxygen Saturation (DOSAT) Monthly time series availability of DOSAT observation values
65 Box plot of DOSAT observation values Monthly time series continuity of DOSAT observation values
66 Distribution of DOSAT observation values Spatial distribution of yearly median of DOSAT observation values
67 Spatial distribution of DOSAT observation values Temporal distribution of DOSAT observation values
68 Ammonia Nitrogen (NH3N) Monthly time series availability of NH3N observation values Box plot of NH3N observation values
69 Monthly time series continuity of NH3N observation values Distribution of NH3N observation values
70 Spatial distribution of yearly median of NH3N observation values Spatial distribution of NH3N observation values
71 Temporal distribution of NH3N observation values Ammonium Nitrogen (NH4N) Monthly time series availability of NH4N observation values
72 Box plot of NH4N observation values Monthly time series continuity of NH4N observation values
73 Distribution of NH4N observation values Spatial distribution of yearly median of NH4N observation values
80 Distribution of NO3N observation values Spatial distribution of yearly median of NO3N observation values
81 Spatial distribution of NO3N observation values Temporal distribution of NO3N observation values
82 Particulate Carbon (PC) Monthly time series availability of PC observation values Box plot of PC observation values
83 Monthly time series continuity of PC observation values Distribution of PC observation values
84 Spatial distribution of yearly median of PC observation values Spatial distribution of PC observation values
85 Temporal distribution of PC observation values pH (pH) Monthly time series availability of pH observation values
86 Box plot of pH observation values Monthly time series continuity of pH observation values
87 Distribution of pH observation values Spatial distribution of yearly median of pH observation values
88 Spatial distribution of pH observation values Temporal distribution of pH observation values
89 Particulate Inorganic Carbon (PIC) Monthly time series availability of PIC observation values Box plot of PIC observation values
96 Particulate Organic Carbon (POC) Monthly time series availability of POC observation values Box plot of POC observation values
97 Monthly time series continuity of POC observation values Distribution of POC observation values
98 Spatial distribution of yearly median of POC observation values Spatial distribution of POC observation values
99 Temporal distribution of POC observation values Particulate Organic Nitrogen (PON) Monthly time series availability of PON observation values
100 Box plot of PON observation values Monthly time series continuity of PON observation values
101 Distribution of PON observation values Spatial distribution of yearly median of PON observation values
102 Spatial distribution of PON observation values Temporal distribution of PON observation values
103 Particulate Organic Phosphorus (POP) Monthly time series availability of POP observation values Box plot of POP observation values
104 Monthly time series continuity of POP observation values Distribution of POP observation values
105 Spatial distribution of yearly median of POP observation values Spatial distribution of POP observation values
112 Spatial distribution of yearly median of TC observation values Spatial distribution of TC observation values
113 Temporal distribution of TC observation values Total Dissolved Nitrogen (TDN) Monthly time series availability of TDN observation values
114 Box plot of TDN observation values Monthly time series continuity of TDN observation values
115 Distribution of TDN observation values Spatial distribution of yearly median of TDN observation values
116 Spatial distribution of TDN observation values Temporal distribution of TDN observation values
117 Total Dissolved Phosphorus (TDP) Monthly time series availability of TDP observation values Box plot of TDP observation values
118 Monthly time series continuity of TDP observation values Distribution of TDP observation values
119 Spatial distribution of yearly median of TDP observation values Spatial distribution of TDP observation values
120 Temporal distribution of TDP observation values Water Temperature (TEMP) Monthly time series availability of TEMP observation values
121 Box plot of TEMP observation values Monthly time series continuity of TEMP observation values
128 Box plot of TIN observation values Monthly time series continuity of TIN observation values
129 Distribution of TIN observation values Spatial distribution of yearly median of TIN observation values
130 Spatial distribution of TIN observation values Temporal distribution of TIN observation values
131 Total Inorganic Phosphorus (TIP) Monthly time series availability of TIP observation values Box plot of TIP observation values
132 Monthly time series continuity of TIP observation values Distribution of TIP observation values
133 Spatial distribution of yearly median of TIP observation values Spatial distribution of TIP observation values
134 Temporal distribution of TIP observation values Total Kjeldahl Nitrogen (TKN) Monthly time series availability of TKN observation values
135 Box plot of TKN observation values Monthly time series continuity of TKN observation values
136 Distribution of TKN observation values Spatial distribution of yearly median of TKN observation values
137 Spatial distribution of TKN observation values Temporal distribution of TKN observation values
144 Spatial distribution of TOC observation values Temporal distribution of TOC observation values
145 Total Organic Nitrogen (TON) Monthly time series availability of TON observation values Box plot of TON observation values
146 Monthly time series continuity of TON observation values Distribution of TON observation values
147 Spatial distribution of yearly median of TON observation values Spatial distribution of TON observation values
148 Temporal distribution of TON observation values Total Organic Phosphorus (TOP) Monthly time series availability of TOP observation values
149 Box plot of TOP observation values Monthly time series continuity of TOP observation values
150 Distribution of TOP observation values Spatial distribution of yearly median of TOP observation values
151 Spatial distribution of TOP observation values Temporal distribution of TOP observation values
152 Total Phosphorus (TP) Monthly time series availability of TP observation values Box plot of TP observation values
153 Monthly time series continuity of TP observation values Distribution of TP observation values