白山水库春季径流模拟中的积雪遥感数据同化研究  

Research on data assimilation of snow remote sensing data in spring runoff simulation of Baishan reservoir

作　　者：鄢康 李文龙 次旦央宗 李鸿雁 YAN Kang;LI Wenlong;CIDAN Yangzong;LI Hongyan(College of New Energy and Environment,Changchun 130021,Jilin,China;Fengman Hydropower Plant of State Grid Xinyuan Co.,Ltd.,Jilin 132108,Jilin,China)

机构地区：[1]吉林大学新能源与环境学院,吉林长春130021 [2]国网新源控股有限公司丰满发电厂,吉林吉林132108

出　　处：《水利水电技术（中英文）》2020年第S02期11-18,共8页Water Resources and Hydropower Engineering

基　　金：国网新源控股有限公司技术开发项目(SGTYHT/17-JS-203);吉林省科技发展计划重点研发项目(20200403070SF)

摘　　要：白山水库流域是季节性积雪区,融雪径流是主要春季径流,掌握水库春季融雪径流规律对于水库调度、春汛防控等有着至关重要作用。雪水当量反映了积雪的物质和能量信息,能定量表征固态降水量,对于融雪径流模拟具有重要意义。本文以白山水库流域的积雪遥感数据同化为核心技术,对欧航局和NASA雪水当量产品进行时空优化插值同化,改善了雪水当量产品在研究区内的像元和时段缺失问题,建立了较高质量的长时间序列雪水当量数据集;识别白山水库流域积雪期为11月中下旬至翌年4月中下旬,多年平均积雪时间为133天;基于雪水当量数据同化结果,建立1981—2010年雪水当量与融雪期径流量的相关关系,确定融雪径流系数为0.55;采用融雪径流系数对2011—2016年融雪径流总量进行模拟,模拟结果合格率在66.67%,模拟效果较好。Baishan reservoir basin belongs to the seasonal snow area,where the snowmelt runoff accounts for a large proportion of the spring runoff,which plays an important role in reservoir operation,spring flood control and so on.The snow water equivalent reflects the material and energy information of snow and can quantitatively evaluate the solid-state precipitation,which has a guiding significance for the simulation of snowmelt runoff.In this paper,the snow remote sensing data assimilation of Baishan reservoir basin is taken as the core technology,and the spatiotemporal optimization of the snow water equivalent products of ESA and NASA is optimized by spatiotemporal interpolation assimilation,which improves the pixel and time interval missing of the snow water equivalent products in the study area.A high-quality long-term sequence snow water equivalent data set is established,which leads to the conclusion that the snow cover period is from the last twenty-days of November to the last twenty-days of April in the next year and averages about 133 days for many years.Based on the assimilation results of snow water equivalent data,the correlation between snow water equivalent and runoff during the snowmelt period from 1981 to 2010 was established,and the snowmelt runoff coefficient was 0.55.The snowmelt runoff coefficient was used to simulate the total amount of snowmelt runoff from 2011 to 2016,and the qualified rate of simulation results was 66.67%and it takes effect.

关 键 词：积雪遥感数据 雪水当量 数据同化 融雪径流 

分 类 号：P333[天文地球—水文科学] TV697.21[水利工程—水文学及水资源]