摘要
【目的】太湖流域是我国经济高度发达的区域,同时也是水资源供需矛盾突出的典型地区。为估算太湖流域多年平均地表水资源量,基于流域地理空间分布、下垫面类型及水文气象条件,【方法】提出分区耦合建模方法,将流域划分为上游山丘区和中下游平原区,分别采用新安江三水源模型和下垫面分类产汇流方法估算1956—2020年地表水资源量,并通过水库径流模拟和一维水动力模型验证结果的可靠性。【结果】研究表明:上游山丘区径流模拟平均确定性系数达0.76,相对误差控制在±7%以内;中下游平原区水位模拟确定性系数平均为0.88,丰水年拟合效果更优;模型估算的多年平均地表水资源量为178.54亿m^(3),较第二次全国水资源调查评价成果161.5亿m^(3)偏大10.6%,较2006—2020年水资源公报平均值174.81亿m^(3)偏大2.1%。【结论】分区耦合模型估算太湖流域地表水资源量具有较好的适用性和可靠性。降雨序列的延长、湖西区产流估算方式优化、下垫面变化等是造成模型同“二调”成果间存在差异的原因,未来研究中应考虑构建动态参数化方案精进模型估算能力。
[Objective]The Taihu Lake Basin is a highly developed economic region in China and a typical area with prominent imbalance between supply and demand of water resources.The aim is to estimate the multi-year average surface water resources in the Taihu Lake Basin based on its geographical distribution,underlying surface types,and hydrometeorological conditions.[Methods]A zonal coupling modeling method was proposed,dividing the basin into the upstream hilly area and the middle-lower plain area.The Xin’anjiang three-source model and the runoff generation and concentration method based on underlying surface classification were used respectively to estimate the surface water resources from 1956 to 2020.The reliability of the result was verified through reservoir runoff simulation and a one-dimensional hydrodynamic model.[Results]The result showed that in the upstream hilly area,runoff simulation achieved an average coefficient of determination of 0.76,with relative errors controlled within ±7%.In the middle-lower plain area,water level simulation yielded an average coefficient of determination of 0.88,with better fitting performance in wet years.The model estimated the multi-year average surface water resources at 17.854 billion m^(3),which was 10.6% higher than the 16.15 billion m^(3) reported in the Second National Water Resources Survey and Assessment and 2.1% higher than the 17.481 billion m^(3) average in the water resources bulletins from 2006 to 2020.[Conclusion]The zonal coupling model demonstrates good applicability and reliability for estimating surface water resources in the Taihu Lake Basin.Differences between the model result and the“Second Survey”result primarily stem from the extended rainfall series,optimized runoff estimation method in the western lake area,and underlying surface changes.Future research should consider developing dynamic parameterization schemes to improve the model’s estimation capabilities.
作者
许钦
张坤
叶鸣
陈星
XU Qin;ZHANG Kun;YE Ming;CHEN Xing(The National Key Laboratory of Water Disaster Prevention,Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China;Hydrology and Water Resources Department,Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China;Yangtze Institute for Conservation and Development,Nanjing 210098,Jiangsu,China;Shanghai Jiading District Hydrological Station,Shanghai 201899,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,Jiangsu,China)
出处
《水利水电技术(中英文)》
北大核心
2025年第9期30-41,共12页
Water Resources and Hydropower Engineering
基金
国家自然科学基金项目(U2443202,52209031)
长江电力智慧长江与水电科学湖北省重点实验室开放基金项目(2422020009)
山东省重点研发计划项目(2023CXGC010905)
中央级公益性科研院所基本科研业务费专项资金项目(Y523008,Y522018,Y524016)
南京水利科学研究院研究生学位论文发展基金(Yy524017)。
关键词
太湖流域
地表水资源量
径流模拟
新安江模型
一维水动力模型
Taihu Lake Basin
surface water resources
runoff simulation
Xinanjiang model
one-dimensional hydrodynamic model
