【摘要】 提出了一种地表-地下径流联合模拟的分布式水文模型,该模型综合考虑了地表径流、土壤水、地下径流之间的相互作用和水量交换,更真实地模拟了径流系统。选取太湖西苕溪流域进行了模型的应用研究,采用1km×1 km网格,就1988-2001年横塘村、范家村两水文站逐日、月实测径流资料进行径流模拟,确定了模型的基本参数。从模拟精度、参数需求、模型稳定性、水量平衡等方面分析模型的特点,研究表明:该模型参数相对简单,模拟精度较高,耦合运行稳定、快速,水量平衡分析详尽。模型可用作地表-地下径流相互作用、流域水量平衡分析和水资源管理的有效计算工具。更多还原

【Abstract】 A distributed fully-coupled surface runoff and groundwater model was developed to account for interactions and water exchange between surface runoff,soil water and groundwater.This model was applied to Xitiaoxi catchment with a discretization of 1 km×1 km grids.Predicted stream flows were compared with the observed ones at Hengtangcun and Fanjiacun gauging stations for 1988-2001 with the calibrated parameters.The model was evaluated by its prediction precision,number of parameters needed,model execution stability and water budget analysis.Results indicate that compared to other models,the current model has less parameters,especially for soil data,which makes the model more applicable to areas where data are limited.The model runs steadily with a satisfactory accuracy of predictions.The comprehensive water budget analysis output from the model can be useful in quantitatively assessing the contributions of different flow components to the total stream discharge.The model can be a useful tool for investigation of the interactions between surface runoff and groundwater,and for water balance analysis and water resources management.更多还原