基于WARMF模型的杭埠-丰乐河流域水文模拟研究

研究了WARMF模型在杭埠-丰乐河流域(巢湖流域最大支流)的水文模拟适应性能并进行了流域水文系统分析.利用AVSWAT2000模型将流域划分为37个子流域,利用流域地貌-土壤分布对应关系、土壤剖面结构、地下水位埋深等条件,确定了子流域的平面分组与剖面土层结构,较大程度上降低了流域模型参数校准的难度与不确定性.利用2000～2003年的水文观测数据,在参数灵敏度分析基础上,对模型水文参数进行了校准与检验.结果表明,WARMF在研究区具有较好的适应性能.WARMF模型与AVSWAT2000模型的水文模拟结果对比表明,WARMF模型具有更好的日拟合性能.基于模型的模拟结果,在空间尺度上定量分析了流域从降水开始到入湖的水循环过程,在时间尺度上分析了年内降雨、径流的分布及其对应关系.流域概化、模型的校准与检验以及流域水文时空变化的系统分析方法等对流域水文、环境的模拟研究与系统分析具有探索意义.

Evaluation of the WARMF model for hydrologic simulation in the Hangbu-Fengle river watershed

The Watershed Analysis Risk Management Framework (WARMF) model was applied for hydrologic simulation in the Hangbu-Fengle River Watershed of Chaohu Lake, Anhui Province, China. The study area was divided into 37 catchments using the AVSWAT2000 model. Based on analysis of the relationships between topography and soil type, soil profile structure and groundwater table within the study area, the 37 catchments were further classified into groups and the thickness of the soil layers in each catchment group was estimated. Observed hydrologic data in 2000~2003 were used for model calibration and validation. The results indicated that the WARMF model was applicable for hydrologic simulation in the Hangbu-Fengle River watershed. Compared to the SWAT model (AVSWAT 2000), the WARMF model gave better performance for daily simulations. Based on the model simulation results, the watershed hydrologic cycle from rainfall to the water in Chaohu Lake was analyzed on a spatial scale; the distribution of precipitation and runoff, and their corresponding relationships were studied on a temporal scale. Watershed generalization, model calibration and validation, and temporal and spatial scale analyses are significant for watershed hydrological and environmental research.