摘要
针对无资料地区水文预报(PUB)问题,分析了Nash模型在无资料地区水文模拟与预报中的适用性。首先基于流域DEM数据及GIS技术提取流域的地形地貌参数,再根据初损后损法计算净雨过程及平均净雨强度,然后采用Eagleson-Bras的流速经验公式推求流速因子,最终确定Nash模型中的各参数,并将其应用于渭河水系秦渡镇流域。结果表明,Nash模型对洪峰和洪量模拟效果较好,对无资料流域洪水预报具有较好的适用性。
Focusing on the predictions in ungauged basin （PUB）, this paper analyzes the applicability of Nash model for hydrological simulation and prediction in ungauged basin. Firstly, geomorphic parameters of the study basin are obtained based on the DEM data and GIS. And the net rainfall process and the average net rainfall intensity are calculated by using the method of initial losses and continuing losses. Then the flow velocity is computed according to the empirical formula of Eagleson Bras. Finally, the parameters of Nash model are determined. The Nash model is applied to simulate the flood process of Qinduzhen Basin in Weihe Basin. The results show that the Nash model can give better simulation of flood peak and flood volume, and it is suitable for the flood forecasting in ungauged basin.
出处
《水电能源科学》
北大核心
2014年第2期23-26,共4页
Water Resources and Power
基金
国家重点基础研究发展计划(973计划)课题(2010CB9511)
江苏省科技攻关项目(2013562113)
