SWAT和WetSpa Extension在罗玉沟流域的应用比较

近年来,运用水文模型来研究流域水文状况越来越普遍,本文以黄土高原丘陵沟壑区第三副区的典型小流域为例,基于SWAT和WetSpa Extension两个模型,从模型的输入数据、模型的参数和模型模拟结果等方面进行比较,以期为该区水沙模拟选择合适水文模型并为将来模型性能的改进提供参考。连续15年的校准验证表明:两个模型都能得到较好的结果,而SWAT模型能应用于水文及泥沙等模拟过程,相对来说功能更全面;WetSpa Extension模型目前仅能提供水文模拟的模块,优点在于模拟时间步长较任意,可进行洪水模拟。

Comparison of application of SWAT and WetSpa Extension in Luoyugou watershed

In recent years,it becomes more and more common to study the watershed hydrological conditions by use of hydrological model. The paper took the typical watershed of the third subplot of loess plateau hilly and gully region as example based on SWAT and WetSpa Extension model.It also explore the applicability of the two hydrological models in this area by comparing the input data, parameter, and simulation results of the two hydrological models,in order to select suitable hydrological model in the area and provide reference for the improvement of model performance in the future. The calibration and validation for 15 consecutive years indicated that the two models can get better result,but SWAT model can apply in the simulation process of hydrology and sediment,and has a comprehensive function; WetSpa Extension model can only provide the module of hydrological simulation, it has the advantage of random simulation time step and can simulate flood.