摘要
蓄水容量曲线是反映流域缺水量空间分布不均匀性的特征曲线,对流域产流计算有直接影响。通过对多个典型流域蓄水容量空间分布的分析,发现Erlang分布能更好地拟合流域的蓄水容量曲线,进一步基于Erlang分布进行流域产流的推导,提出了基于Erlang分布蓄水容量曲线的流域产流模型。应用结果表明,基于Erlang分布的流域产流模型,增加了模型的适应性,模拟结果更接近流域实际的产流过程,比新安江模型能取得更高的模拟精度。此外,该产流模型的参数可由流域地形和土壤类型数据估算,为无资料地区的产流计算提供了一种可行的途径。
A storage capacity curve reflects the spatial heterogeneity in water deficiency within a basin and is used for computing the production of watershed runoff.This study analyzed the spatial distributions of watershed storage capacity for several typical basins.The Erlang distribution was shown to have the best fit to the watershed storage capacity curves,which was then adopted to derive the production of runoff in the studied watersheds.This study proposes a novel watershed runoff yield model with increased adaptability based on the Erlang distribution storage capacity curve;hence,the model should be better able to represent the actual runoff yield process in a basin.The proposed watershed runoff yield model generated more accurate simulations compared to those of the Xin′anjiang model.In addition,the parameters of the proposed runoff yield model can be estimated from basin topography and soil type data,thereby providing a feasible approach for the calculation of runoff yield in data-scarce areas.
作者
闫宝伟
李正坤
段美壮
江慧宁
刘昱
YAN Baowei;LI Zhengkun;DUAN Meizhuang;JIANG Huining;LIU Yu(School of Civil and Hydraulic,Huazhong University of Science and Technology,Wuhan 430074,China;PowerChina Huadong Engineering Corporation Limited,Hangzhou 311122,China)
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2021年第1期120-126,共7页
Advances in Water Science
基金
国家重点研发计划资助项目(2016YFC0402708)
中央高校基本科研业务费资助项目(2017KFYXJJ195)。
