Water Quality LV/2005-IB/EN/01 Final Meeting 26 June 2007 Water monitoring assessment Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Questions related to monitoring water quality What is the water quality status? What are the ecosystems at risk ? What are the trends ? What are the consequences of land use/cover changes on water quality? What are the fluxes of matter and pollutants ? Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Spatial representation Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Surface water Hydrology Groundwater Climate monitoring network spatio-temporal representativeness Keep the long-term series Re-enforce the connections between monitoring networks Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Water discharge monitoring assessment Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Catchment surface (km 2 ) versus Specific run-off (l/s/km 2 ) Daugava l/s/km 2 km km 2 l/s/km 2 Large variability in small catchments Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Catchment surface (km 2 ) versus Average discharge (m 3 /s) y = r 2 = Discharge (m 3 /s) km y = 0.008x r 2 = km 2 Discharge (m 3 /s) y = x r 2 = km 2 Discharge (m 3 /s) Prediction decreases in small catchments Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Catchment surface (km 2 ) versus max discharge / min discharge km max discharge / min discharge km 2 Svete - Uzini Amata - Melturi Durbe - Cirava Barta - Dukupji Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Water quality monitoring assessment Existing network Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Forest (%) Agriculture (%) Wetland (%) Lakes (%) Pop. Density (inh / km 2 ) Mean SE Median Min Max Existing water quality monitoring in Latvia Catchment land-cover Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Catchment surface (km 2 ) versus % of forest ? km 2 % Forest km 2 % Forest Existing water quality monitoring network Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Catchment surface (km 2 ) versus % of agriculture ? km 2 % of Agriculture % of Agriculture km 2 Existing water quality monitoring network Water Quality LV/2005-IB/EN/01 Final Meeting 26 June % Forest versus % agriculture % Forest % Agriculture versus % wetland % Wetland % Agriculture % Agriculture versus % lakes % Agriculture % Lake Existing water quality monitoring network Water Quality LV/2005-IB/EN/01 Final Meeting 26 June % of Agriculture versus density of population % Agriculture Inh / km 2 Catchment surface (km 2 ) versus density of population Inh / km 2 km 2 % of Forest versus density of population Inh / km 2 % forest Existing water quality monitoring network Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Water quality monitoring assessment Proposed network Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Temporal representation Biogeochemical monitoring Proposed water quality monitoring in Latvia Sampling effort Nutrients (N & P) & Basic indicators (O 2 pH, conductivity, SM) 1172 analyses Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Proposed water quality monitoring in Latvia Sampling effort Nutrients (N & P) & Basic indicators (O 2 pH, conductivity, SM) Total of analysesNb of sites with Monthly sampling Nb of sites with Seasonal sampling Daugava Lielupe Venta Gauja Choose the best spatio-temporal framework for water quality monitoring Water quality monitoring Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Sampling at low waterin summer in winter Sampling at high waterduring snowmelt in autumn 1 - Easy to planify 2 - Meaningfull in terms of representativeness of low flow (baseflow) conditions 3 - Provides realistic values to calculate nutrient fluxes Proposal for nutrients and basic indicators 67 sites with monthly sampling instead of 24 including low and high water seasonal sampling 97 sites with seasonal sampling instead of 221 Purchase autonomous automatic samplers Measure Dissolved Organic Carbon Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Proposed water quality monitoring in Latvia Sampling effort Major ions (K Na Mg Ca HCO 3 SO 4 Hardness Cl) Total of analyses per year Nb of sites with Monthly sampling Nb of sites with Seasonal sampling Daugava1210 Lielupe2420 Venta1210 Gauja1210 Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Proposed water quality monitoring in Latvia Minor ions (Cd Pb Hg Ni Cu Zn As Cr) Total of analysesNb of sites with Monthly sampling Nb of sites with Seasonal sampling Daugava 28 (Pb Hg Ni Zn) 24 (Cu) 12 (As) 10 (Cr) 04 (every 2 months) 1 (every 4 months) Lielupe 38 (Pb) 34 (Cd Hg Ni Cu) 30 (Zn) 12 (As Cr) 04 (every 2 months) 4 (every 4 months) Venta 50 (Pb Hg - Cu) 46 (Cd Ni - Cu) 20 (Cr) 6 (As) 07 (every 2 months) 3 (every 4 months) Gauja 26 (Cd) 22 (Pb Hg Ni Cu Zn) 16 (As) 4 (Cr) 03 (every 2 months) 2 (every 4 months) Water Quality LV/2005-IB/EN/01 Final Meeting 26 June Proposed water quality monitoring in Latvia Organic pollutants (naphtas, pesticides, phenols) Total of analysesNb of sites with Monthly sampling Nb of sites with Seasonal sampling Daugava24 (Naphtas) 2 (pesticides) 10 (phenols) (every 2 months) 2 (once a year) 1 (every 2 months) 1 (every 4 months) Lielupe18 (Naphtas) 5 (pesticides) 16 (phenols) (every 2 months) 5 (once a year) 3 (every 2 months) 1 (every 4 months) Venta36 (Naphtas) 2 (pesticides) 6 (phenols) (every 2 months) 2 (once a year) 1 (every 2 months) Gauja12 (Naphtas) 1 (pesticides) 0 (phenols) (every 2 months) 1 (once a year)