The GROWA98 model for water balance analysis in large river basins—the river Elbe case study
The GROWA98 model for water balance analysis in large river basins—the river Elbe case study
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大河流域水平衡分析的 GROWA98 模型——易北河案例研究
DOI：
10.1016/s0022-1694(01)00579-0
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
F. Wendland
中科院分区：
文献类型：
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作者：
R. Kunkel;F. Wendland
利用GROWA98模型对易北河流域(德国部分)1961-1990年的水量平衡进行了区域分异分析。长期平均总径流量被模拟为场地条件、气候、土壤、地质、地形和土地利用的区域相互作用的函数。根据区域特征(如地质、地下水埋深)，利用基流指数将总径流分为直接径流(内流和地表径流)和地下水径流(基流)。通过这种方式，确定了区域主要径流成分，即养分从土壤向地表水转移的路径。通过将易北河流域120个子流域的径流水位计算值与实测值进行比较，对模型结果进行了验证。总体而言，模型径流值和实测值之间的差异不到15%，表明所选程序的可靠性。这允许进一步的模型应用，例如，对地下水和地表水的扩散养分输入进行量化，区分为径流成分。
An area differentiated water balance analysis in the river Elbe basin (German part) for the hydrological period 1961–1990 was carried out using the GROWA98 model. The mean long-term total runoff was modelled as a function of the regional interaction of the site conditions climate, soil, geology, topography and land use. The total runoff was separated into the direct runoff (interflow and surface runoff) and groundwater runoff (base flow) using base-flow indices, depending on area characteristics (e.g. geology, depth for groundwater). In this way, the regional dominant runoff components, i.e. pathways for the displacement of nutrients from soil to surface water were identified. The model results were validated by comparing the calculated runoff levels with measured data from 120 sub-basins of the river Elbe-catchment area. In general, the differences between modelled and measured runoff values were less than 15%, indicating the reliability of the chosen procedure. This allows further model applications, e.g. for the quantification of the diffuse nutrient input into groundwater and surface waters differentiated to the runoff components.