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作 者:王海彬 刘家宏[1,2] 刘希胜 王东[1,2] WANG Haibin;LIU Jiahong;LIU Xisheng;WANG Dong(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Key Laboratory of River Basin Digital Twinning of Ministry of Water Resources,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Hydrology and Water Resources Forecast Center of Qinghai Province,Xining 810001,China)
机构地区:[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]中国水利水电科学研究院水利部数字孪生流域重点实验室,北京100038 [3]青海省水文水资源测报中心,青海西宁810001
出 处:《水资源保护》2024年第4期82-91,共10页Water Resources Protection
基 金:青海省重点研发与转化计划项目(2022-SF-143)。
摘 要:基于青海湖流域2010—2020年的降水资料,利用ANUSPLIN插值法反演了青海湖流域的降水时空分布。结合水文气象及地球遥感解译等资料,构建了青海湖流域数字流域模型,并对模型参数进行了率定和验证。将模型应用于探究下垫面变化对流域水文过程的影响,解析了青海湖流域水循环演变规律和驱动机制,并对关键参数进行了敏感性分析。结果表明:在率定期和验证期,布哈河口站纳什效率系数分别为0.72和0.67,刚察站分别为0.81和0.84,说明数字流域模型适用于青海湖流域降水长时空序列模拟;土壤垂向下渗速率和土壤水平渗透速率主要影响径流的峰值,其中表层土水平渗透速率最敏感;土壤孔隙率及初始含水量主要影响径流的基流,其中中层土初始含水量最敏感。Based on precipitation data of the Qinghai Lake Basin from 2010 to 2020,the ANUSPLIN interpolation method was used to invert the spatiotemporal distribution of precipitation in the Qinghai Lake Basin.A digital watershed model of the Qinghai Lake Basin was constructed by combining hydrological,meteorological,and earth remote sensing interpretation data,and the model parameters were calibrated and verified.The model was applied to explore the impact of underlying surface changes on watershed hydrological processes,analyze the evolution laws and driving mechanisms of water cycle in the Qinghai Lake Basin,and conduct sensitivity analysis on key parameters.The results show that during the calibration and validation periods,the Nash-Sutcliffe efficiency coefficients of the Buhahekou Station are 0.72 and 0.67,respectively,while those of the Gangcha Station are 0.81 and 0.84,indicating that the digital watershed model is suitable for simulating long-term spatiotemporal sequences of precipitation in the Qinghai Lake Basin.The vertical and the horizontal infiltration rates of soil mainly affect the peak of runoff,with the horizontal infiltration rate of surface soil being the most sensitive.The soil porosity and initial water content mainly affect the base flow of runoff,with the initial water content of the middle soil being the most sensitive.
关 键 词:数字流域模型 ANUSPLIN插值法 下垫面 敏感性分析 青海湖流域
分 类 号:TV122[水利工程—水文学及水资源]
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