By Bioforsk RECOCA Team Per Stålnacke Csilla Farkas Johannes Deelstra RECOCA Annual Workshop 14-15 December, 2009 Denmark
Quantification of retention from source emissions to river mouth Estimation of impact of mitigation measures in regional and Baltic-wide models on coastal loads HERE SHOULD PERHAPS BE MORE FROM CONTRACT. Uncairtanty?
NutRet (Nutrient Retention) tool developed within the EUROHARP (EU FP5) project data of different watersheds from all over the World process knowledge + regression analyses semi-empirical relationships static model; time step of 1 year option to incorporate a dynamic component for lakes was applied to calculate the P and N retention capacity of different Baltic Sea watersheds
NutRet incorporates retention in rivers, lakes, reservoirs and wetlands employs different Tires corresponding to the level of complexity (both, input data and calculation methods) N, P retention for the whole catchment OPTION 1. N, P retention for the whole catchment OPTION 2. Dynamic component Rivers Streams Lakes Reservoirs no wetlands Levels of complexity: lakes only
brief overview of available simple approaches to calculate retention and selection of the NutRet tool for calculations overview of NutRet input data requirement constructing a NutRet RECOCA meta database construction of Excel sheets for data entry performing calculations for all the watersheds that we have received data for reporting in the end of June 2009 organising and participating with 3 presentations in the RECOCA-SWAT workshop improving skills on SWAT model application at Bioforsk
River Catchme nt area Agric. land area Wetland area Rivers and streams Lakes and reseroirs Wetlands River systems Pärnu (Estonia) Odense (Denmark) Nevezis (Lithuania) Berze (Latvia) (km2) (%) (%) 6920 33.9 5.1 Tier 1 Tier 1 Tier 1 Tier 1 1059 72.1 3.9 Tier 1 Tier 1 and Tier 2: (Arreskov skø) Tier 1 Tier 1 6146 61.7 5.0 Tier 1 Tier 1 Tier 1 Tier 1 872 48.9 1.0 Tier 1 Tier 1 Tier 4 Tier 1 Tier 1
Name of the catchment (km 2 ) Size of the catchment (km 2 ) Parnu, Estonia 6920 Size of the agricultural land (km 2 ) 2346 NutRet OSPAR N P N P tons per year tons per year Stream and river retention 411.6 1.3 Wetlands 3530 0 Lakes and reservoirs Tier 1 0 0 Tier 2 0 0 Tier 3 0 0 Tier 4 0 0 Total 0 0 Total for the Catchment - Option 1 3941.6 1.3 River system 641.9 14.7 Wetlands 3530 0 Total for the Catchment - Option 2 4171.9 14.7 Data from other sources 620 15
Name of the catchment (km 2 ) Size of the catchment (km 2 ) 1059 Size of the agricultural land (km 2 ) 764 Stream and river retention 374.6 1.2 Wetlands 410 82.5 Lakes and reservoirs Odense fjord, Denmark N NutRet Tier 1 359.2 4.9 Tier 2 70.1 1.5 Tier 3 0 0 Tier 4 0 0 Total 429.3 6.4 Total for the Catchment - Option 1 1213.9 90.1 P tons per year Land use map of the Odense catchment River system 895.5 53.5 Wetlands 410 82.5 Total for the Catchment - Option 2 1305.5 136
Name of the catchment (km 2 ) Size of the catchment (km 2 ) Nevezis River, Latvia 6146 Size of the agricultural land (km 2 ) 3791 NutRet N P tons per year Stream and river retention 867.7 2.8 Wetlands 3070 0 Lakes and reservoirs Tier 1 946.4 13 Tier 2 0 0 Tier 3 0 0 Tier 4 0 0 Total 946.4 13 Nevezis catchment Rivers, wetlands and lakes total 4884.1 15.8 River system 2164.7 123.5 Wetlands 3070 0 Total for the Catchment - Option 2 5234.7 123.5
Source: Viesturs Jansons: KALME, WP2 on Climate change impact on the nutrient run-off in river basin (presentation)
Name of the catchment (km 2 ) Size of the catchment (km 2 ) Nevezis River, Latvia 872 Size of the agricultural land (km 2 ) 426 NutRet N P tons per year Stream and river retention 149.5 0.5 Wetlands 80 0 Lakes and reservoirs Tier 1 425.6 5.8 Tier 2 0 0 Tier 3 0 0 Tier 4 0 0 Total 425.6 5.8 Rivers, wetlands and lakes total 655.1 6.3 River system 2110 279.1 Wetlands 80 0 Total for the Catchment - Option 2 2190 279.1
Nutrient retention in the pilot watersheds derived for a unit are Total N retention kg / ha Catchment name River systems Rivers, wetlands and wetlands and lakes Berze River 25.1 7.51 Nevezis River 8.52 7.95 Parnu River 6.03 5.70 Odense Fjord 12.33 11.46 Total P retention kg / ha Catchment name River systems Rivers, wetlands and wetlands and lakes Berze River 3.2 0.1 Nevezis River 0.2 0.0 Parnu River 0.0 0.0 Odense Fjord 1.3 0.9