Nutrient Transport Modelling in the Daugava River Basin - DiVA Portal

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Appendix A. Input data and parameters used by the GWLF modelDescription of parameter/input Name Unit Initial valueCalibratedValueReferenceRecession coefficient box 1 R1 day 1 0.0025 0.03 Mörth, 2004Recession coefficient box 2 R2 day 1 0.001 0.01 Mörth, 2004Groundwater transfer from box 1 tobox 2 gr day 1 0.001 0.01 Mörth, 2004Seepage coefficient s day 1 0Initial unsaturated storage U(0) cm 0Initial saturated storage box 1 S1(0) cm 18.6 2.7 Average predicted value in MarchInitial saturated storage box 2 S2(0) cm 23.6 1.7 Average predicted value in MarchInitial snow cover cm 20 1.5 Average predicted value in MarchSediment delivery ratio DR 0.009 Dai et al., 2000Unsaturated water capacity U* cm 0 Mörth, 2004ET cover coefficient, octapr CVt 0.3 0.35 Dai et al., 2000ET cover coefficient maysept CVt 1 0.83 Dai et al., 2000Day length APRIL Ht H 13.82 Orchid cultureDay length MAY Ht h 15.87Day length JUNE Ht h 17.06Day length JULY Ht h 16.57Day length AUG Ht h 14.74Day length SEPT Ht h 12.43Day length OCT Ht h 10.15Day length NOV Ht h 8.05Day length DEC Ht h 6.93Day length JAN Ht h 7.526
Description of parameter/input Name Unit Initial valueCalibratedValueReferenceDay length FEB Ht h 9.37Day length MAR Ht h 11.46Growing season (average daily temp. >10 °C) MaySept BALTEX Hydrological Data Centre data baseErosivity coefficient growing season a 0.25 Dai et al., 2000Erosivity coefficient no growing season a 0.06Area of each land use type AR k ha Hannerz and Destouni, 2005Artificial surfaces (urban) 50819Bare areas (rural) 0Cultivated areas (rural) 4409294Herbaceous+shrub (rural) 510356Wetland (rural) 44831Snow and ice (rural) 0Coniferous (rural) 1482044Mixed forest (rural) 1429719Deciduous forest (rural) 509744Water (rural) 148463Curve number CN2 k Löfgren, 2004Artificial surfaces 100Bare areas 75 80Cultivated areas 75 80Herbaceous+shrub 75 80Wetland 75 80Snow and ice 100Coniferous forest 75 8027
Page 1 and 2: UPTEC W05 009Examensarbete 20 pFebr
Page 3 and 4: Nyckelord: avrinning, näringsämne
Page 6 and 7: APPENDIX C. DETERMINATION OF POTENT
Page 8 and 9: simulation system CatchmentSim. The
Page 10 and 11: Figure 1. The hydrological part of
Page 12 and 13: TemperaturePrecipitation20.00120deg
Page 14 and 15: 3.2 MODEL DESCRIPTION3.2.1 An overv
Page 16 and 17: Groundwater discharge to the river
Page 18 and 19: Groundwater nutrient loadsThe groun
Page 20 and 21: There is therefore no guarantee tha
Page 22 and 23: a) Streamflow, calibration periodb)
Page 24 and 25: 4.2 IMPACT OF THE CURVE NUMBER ON N
Page 26 and 27: the chosen value is a very rough ap
Page 28 and 29: all cultivated land will have winte
Page 30 and 31: HELCOM, 2004a. 30 years of protecti
Page 34 and 35: Description of parameter/input Name
Page 36 and 37: Description of parameter/input Name
Page 38 and 39: moisture.Figure B1. Selection of cu
Page 40 and 41: wherea t = rainfall erosivity coeff
Page 42 and 43: Appendix F. Regression lines of rep

Nutrient Transport Modelling in the Daugava River Basin - DiVA Portal

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