摘要
利用红碱淖流域中鸡雨量站1977—2008年降水量资料,构建了降水基尼系数模型,分析了降水量基尼系数的变化规律,结合红碱淖面积变化趋势,揭示了降水不均匀变化对红碱淖面积的影响。结果表明:1977—2008年平均降水基尼系数为0.445 2,年降水量与降水基尼系数呈一定的负相关性,即丰水年基尼系数较小,枯水年增大,其他年型在均值上下浮动;②降水主要通过其不均匀分布对红碱淖水量进行削丰补枯调节,成为影响其面积的重要因素之一。
Based on the precipitation data of Zhongji Rainfall Station from 1977 to 2008 ,this paper established the precipitation Gini coefficient model to analyze precipitation Gini coefficient changing pattern under the different precipitation years,combining with the Hongjiannao area change trend,the effect of uneven precipitation distribution on Hongjiannao area was analyzed. The results show that：a）the 32-year mean Gini coefficient of precipitation temporal distribution from 1977 to 2008 is 0. 445 2,and the annual precipitation has some negative correlation with the Gini coeffi-cient of precipitation. In other words,the Gini coefficient of precipitation is rather on the high side in dry years,lower in wet years,and the Gini coefficient of precipitation above and below the mean in other hydrological years;b）precipitation becomes one of the important factors affected the area distribution of Hongjiannao Lake by the uneven distribution of precipitation,which increases the amount of water resources of Hongjiannao Lake in dry hydrological years,and abates the amount of water resources in wet hydrological years;c）to be compared with curve of typeⅡ,the curve of typeⅠwhich has a higher proportion of the precipitation,should have stronger stability and more conducive to the stability of Hongjiannao area.
出处
《人民黄河》
CAS
北大核心
2014年第5期31-33,共3页
Yellow River
基金
"十二五"国家科技支撑计划项目(2012BAB02B04)
中央分成水资源费资助项目(1261220162511)
关键词
基尼系数
降水年型
面积变化
不均匀变化
降水
红碱淖
Gini coefficient
precipitation year
change of area
discontinuity change
precipitation
Hongjiannao Lake
