摘要
基于汉江流域5个典型水文站1956—2016年逐日平均流量资料,采用数理统计手段分析了汉江流域汛期径流量的时程变化特性;根据流域内水文气象资料、DEM、土壤类型和植被覆盖等资料,构建适用于汉江流域的VIC模型;基于VIC模型的径流模拟成果,分析汛期径流空间分布特征。结果表明:汛期径流量均呈现下降趋势,在1990年前后存在较强的突变性,并伴随有6~8 a、18~21 a两类尺度的周期振荡特性;从模型的率定和验证结果来看,VIC模型在汉江流域的模拟精度总体较好,基本能反映汉江流域的降雨径流特性;以1990年突变点为界,夏汛期径流空间分布差异性变大,极值中心有所转移,秋汛期和汛期径流深的极值呈减小趋势,极值中心变化差异较小。研究成果对加深汉江流域洪水资源变化规律的认识,雨洪资源利用及水资源优化配置具有一定的借鉴价值。
Based on the average daily flow data of five typical hydrologic stations from 1956 to 2016 in the Hanjiang River Basin,this paper analyzes the spatio-temporal vibration characteristics of runoff in flood season by means of mathematical statistics,establishes the VIC model applicable to Hanjiang River Basin according to the hydrometeorological data,DEM,soil type and vegetation cover data,and analyzes the spatial distribution characteristics of runoff in flood season based on runoff simulation results of the VIC model.The results show that:the runoff of the five stations in flood season showed a downward trend,and there were strong changes around 1990 with periodic oscillation characteristics of 6~8 years and 18~21 years;According to the calibration and validation results of the model,with good simulation accuracy,the VIC model can basically reflect the rainfall and runoff characteristics of the Hanjiang River Basin;Based on the change point in 1990,the difference on spatial distribution of runoff in summer flood season is larger,and the extremum center was transferred to a certain extent.The extremum in autumn flood season and flood season with deep runoff was decreasing,and the variation of extremum center was smaller.The results could be considered as a reference for understanding the variation of flood resources,rain-flood resources utilization and optimal allocation of water resources in Hanjiang River Basin.
作者
王栋
吴栋栋
解效白
李雪慧
WANG Dong;WU Dongdong;XIE Xiaobai;LI Xuehui(Bureau of Hydrology,Changjiang Water Resources Commission,Wuhan 430010,China;Pearl River Water Resources Commission of Ministry of Water Resources,Guangzhou 510611,China;The 724th Research Institute of China Shipbuilding Industry Corporation(CSIC),Nanjing 210000,China;Zhejiang Guarantee Group Co.,Ltd.,Hangzhou 310020,China)
出处
《人民珠江》
2020年第4期30-39,共10页
Pearl River
基金
国家重点研发计划项目(2016YFC0400901)。
关键词
汛期径流
时空变化
趋势性
突变性
周期性
VIC模型
汉江流域
runoff in flood season
spatio-temporal variation
trend
change
periodicity
VIC model
Hanjiang River Basin
