Physically-based hydrological modelling for non-point dissolved phosphorus transport in small and medium-sized river basins / Modélisation hydrologique à bases physiques et du transport de phosphore dissous diffus en bassins versants de petite et moyenne tailles
Physically-based hydrological modelling for non-point dissolved phosphorus transport in small and medium-sized river basins / Modélisation hydrologique à bases physiques et du transport de phosphore dissous diffus en bassins versants de petite et moyenne tailles
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中小型河流流域非点溶解磷迁移的基于物理的水文模型 / Modélization Hydrologique à Bases Physiques et du Transport de Phosre dissous diffus en Basins versants de Petite et Moyenne Tailles
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Michael Rode
中科院分区：
文献类型：
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作者：
Karl;Gregor Ollesch;Michael Rode
摘要 摘要 目前的研究表明，控制泥沙和磷面源流失的策略应关注流域内不同径流成分及其时空变化。这是确定减少面源污染有效管理措施的前提。因此，非点源模型，特别是在潮湿气候地区，应考虑可变的水文活跃源区。这些模型应该能够考虑饱和地表径流以及霍顿地表径流产生的径流。本研究选择了水文模型 WaSiM-ETH 与侵蚀和磷输送模型 AGNPS 的组合。该模型在 WaSiM 径流生成模式（Green & Ampt/TOPMODEL 或 Richards 方程方法）和 SCS 曲线数模式下运行，以评估这些不同径流计算程序对溶解磷产量的影响。选择德国中部面积分别为1.44平方公里和128.9平方公里的一个小型流域和一个中型流域进行调查。结果表明，WaSiM-AGNPS 耦合比 SCS 曲线数法产生更准确的结果。对于空间分布，更基于物理的模型方法计算出更现实的水和磷产量区域的分布。
Abstract Abstract Current research suggests that strategies to control sediment and phosphorus loss from non-point sources should focus on different runoff components and their spatial and temporal variations within the river basin. This is a prerequisite for determining effective management measures for reducing diffuse source pollution. Therefore, non-point source models, especially in humid climatic regions, should consider variable hydrologically active source areas. These models should be able to consider runoff generation by saturated overland flow, as well as Hortonian overland flow. A combination of the hydrological model WaSiM-ETH and the erosion and P-transport model AGNPS was chosen for this study. The models were run in the WaSiM runoff generation mode (Green & Ampt/TOPMODEL or Richards equation approach) and the SCS curve number mode to assess the effect of these different runoff calculation procedures on the dissolved phosphorus yield. A small and a medium-sized river basin, of the area of 1.44 and 128.9 km2, respectively, in central Germany were selected for the investigation. The results show that the WaSiM–AGNPS coupling produces more accurate results than the SCS curve number method. For the spatial distribution, the more physically-based model approach computed a much more realistic distribution of water and phosphorus yield-producing areas.