Tasks and problems in modelling the penetration of ...

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XVI International Conference on Computational Methods in Water Resources (CMWR-XVI) Ingeniørhuset

Tasks and problems in modelling the penetration of the nutrients in subsurface environment
Author:Olga Nitcheva <nitcheva@iwp.bas.bg> (Institute of Water Problems at the BAS)
Presenter:Olga Nitcheva <nitcheva@iwp.bas.bg> (Institute of Water Problems at the BAS)
Date: 2006-06-18     Track: Special Sessions     Session: Groundwater Optimal Management Session

Bulgaria is famous for its soil fertility and very tasty fruits and vegetables. Rearrangement of the land use after the political changes has not yet been finished. The future association to the European Union will demand from us large amount of agricultural goods. That involves land use changes and intensive fertilizer application. The quality of the subsurface environment can be affected by these agricultural activities. The fertilizers, moving below the soil root zone, may contaminate underlying groundwater reservoirs. This is a serious problem, which should be investigated and avoided as well as it is possible. One of the main tools in that direction is the employment of mathematical models. The paper reports the research accomplished for testing the abilities of such a model for solving practical problems of land use. WAVE is one of the models used for evaluation and prediction of nutrient leaching to groundwater and surface water systems under the influence of fertilization, soil properties, soil tillage, cropping pattern and hydrological conditions. The reported investigation is done on a suitable rural region in Bulgaria- test field Chelopechene, near to Sofia. During the modeling of the processes of water flow and solute transport and transformation with the specific climate conditions arose many problems. It was impossible to collect all information necessary for modeling. Thanks to the available world database it was done a satisfactory simulation, with analyzing the effects of different scenarios on nitrogen leaching from rural areas. The model WAVE was developed for the Bulgarian conditions.