| 摘要: |
| 【目的】研究SWAT模型在渭河流域水文循环过程模拟上的适用性，为渭河流域时空径流响应研究奠定基础。【方法】依据林家村、咸阳、华县、张家山和状头5个水文站，将渭河流域划分成5个子区间，基于SWAT分布式水文模型，对各子区间1978-1982年和1983-1986年的月径流过程分别进行校准和验证，并对各分区径流模拟结果的合理性进行分析。【结果】渭河流域各水文站月模拟流量过程与实测流量过程均拟合较好，校准期林家村、咸阳、华县、张家山和状头5个水文站的相关系数分别为0.73，0.81，0.86，0.79，0.79；纳什系数分别为0.58，0.75，0.77，0.65，0.51；相对误差分别为10.73，-2.73，-11.20，-19.95，-10.80。验证期5个水文站的相关系数分别为0.87，0.81，0.86，0.75，0.79；纳什系数分别为0.80，0.77，0.82，0.68，0.69；相对误差分别为16.81，17.95，19.91，19.72，19.87，均满足要求。SWAT模型模拟效果较好，但并未达到最佳，主要是研究区利用数据的限制以及模型自身不确定因素的综合影响所致。【结论】SWAT模型在渭河流域各个分区均有较好的适用性，为研究渭河流域气候和土地利用变化的时空径流响应提供了模型基础。 |
| 关键词: SWAT模型 径流分区 水文循环 渭河流域 |
| DOI： |
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| 基金项目:国家自然科学基金 (51409210,51179149,51190093) |
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| Runoff simulation in subzones of the Wei River Basin based on the SWAT model |
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LI Yunyun,CHANG Jianxia,JIN Wenting,et al
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| Abstract: |
| 【Objective】The applicability of SWAT model in hydrological cycle simulation in the Wei River Basin was studied to provide basis for the study of spatial and temporal runoff response.【Method】The Wei River Basin was divided into five subzones based on the Linjiacun,Xianyang,Huaxia,Zhangjiashan,and Zhuangtou stations.The monthly runoffs at these five hydrological stations in corresponding subzones were calibrated and validated by the SWAT model during 1978-1982 and 1983-1986,respectively.The rationalities of the results in each subzone were analyzed as well.【Result】The simulated runoffs agreed well with the observations at the five stations.In calibration period,the correlation coefficients for Linjiacun,Xianyang,Huaxian,Zhangjiashan,Zhuangtou stations were 0.73, 0.81,0.86,0.79 and 0.79,the Nash efficiency coefficients were 0.58,0.75,0.77,0.65 and 0.51,and the relative errors were 10.73,-2.73,-11.20 -19.95 and -10.80,respectively.In the validation period,the correlation coefficients for the five stations were 0.87,0.81,0.86,0.75 and 0.79, the Nash efficiency coefficients were 0.80,0.77,0.82,0.68 and 0.69,and the relative errors were 16.81,17.95,19.91,19.72 and 19.87,respectively.The results met the requirements but did not approach the best performance due to the restriction of the land use map in this study and the uncertainties of the model.【Conclusion】The SWAT model could be used in the Wei River Basin,which provides model basis for the study of spatiotemporal responses of runoff to climate variation and land use change. |
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