| 摘要: |
| 【目的】通过优化CN值构建SCS-CNP模型，并探讨SCS-CNP模型在延庆地区典型下垫面条件下的适用性，可以为区域水资源管理提供科学依据和理论参考。【方法】以延庆区7种典型下垫面为研究对象，利用研究区长期观测的降雨-径流数据，采用多元回归线，基于降雨量构建CN值估算方法并改进SCS-CN模型，并探究改进CN值后的模型（SCS-CNP）在不同下垫面中的适应性。【结果】1)基于标准SCS-CN模型，7种不同下垫面条件（T1—T7处理）下的径流实测值整体低于模拟值；2）改进SCS-CNP模型在不同下垫面中的总体应用效果优于标准SCS模型；3）改进SCS-CNP模型在休耕地下垫面条件下的模拟精度依次优于林地、耕地。【结论】标准SCS-CN模型不适用于延庆区典型下垫面条件下的径流模拟 ，改进后的SCS-CNP模型在延庆区典型下垫面条件下的径流模拟具有良好的适应性。 |
| 关键词: SCS-CN模型；径流计算；径流曲线数；模型改进；延庆区 |
| DOI： |
| 分类号:TV211.1 |
| 基金项目: |
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| Optimization and application of Runoff Curve Model in Yanqing typical underlying surface |
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Li Zhimei
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Water and soil conservation management station of Yanqing District Water Bureau of Beijing
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| Abstract: |
| 【Objective】Built SCS-CNP model by optimizing CN value，and the applicability of SCS-CNP model under typical underlying surface conditions in Yanqing area will be discussed, which can provide scientific basis and theoretical reference for regional water resources management.【Method】 In this study, seven typical underlying surfaces in Yanqing District were taken as the research objects. The long-term observed rainfall and runoff data, linear regression were used to built improved SCS-CN model under the conditions of different underlying surfaces and explore the adaptability of the improved CN value model (SCS-CNP) in different underlying surfaces.【Result】1)Based on the standard SCS-CN model, the observed value of runoff under seven different underlying surface conditions (T1-T7 treatment) are generally lower than the simulated values; 2) The accuracy of the improved SCS-CNP model in different underlying surfaces is better than that of the standard SCS model; 3) The simulation accuracy of the improved SCS-CNP model under the condition of fallow land is highest which followed by accuracy used in forest land and cultivated land conditions.【Conclusion】The standard SCS-CN model is not suitable for runoff simulation under typical underlying surface conditions in Yanqing District. The improved SCS-CNP model has good adaptability for runoff simulation under typical underlying surface conditions in Yanqing District. |
| Key words: SCS-CN model; runoff calculation; runoff curve; model improvement; Yanqing District |
