洞庭湖淤积、围垦对湖区江湖洪水影响的模拟  

IMITATIVE STUDY ON THE EFFECT OF SILTS AND CULTIVATION ON FLOODING IN DONGTING LAKE

作　　者：姜加虎[1] 黄群[1] 

机构地区：[1]中国科学院南京地理与湖泊研究所,江苏南京210008

出　　处：《长江流域资源与环境》2006年第5期584-587,共4页Resources and Environment in the Yangtze Basin

基　　金：中国科学院方向性项目(KXCX3-SW-331);领域前沿项目"洞庭湖区退田还湖对洪水影响与环境生态效应研究"联合资助.

摘　　要：应用数值模拟技术，通过建立洞庭湖与长江耦合的水动力学数值模型，并利用长江沿江的宜昌、枝江、沙市、监利、螺山和洞庭湖区沿湖的南咀、小河咀、沅江、鹿角、岳阳和城陵矶等水文测站的水文资料，开展洞庭湖区湿地恢复的洪水效应模拟计算，选用1998年6月15日～8月31日洪水资料作为模型计算依据。通过模拟计算，对1952年以来洞庭湖淤积、围垦对江湖洪水的影响进行了定量评估。结果显示，1952～1998年的47年间，洞庭湖湖泊湿地围垦对江湖洪水位升高影响的相对量是湖泊淤积对江湖洪水位升高影响值的2～10倍。Based on numerical imitative methods, a dynamic numerical model was set up between Dongting Lake and Yangtze River, and imitative calculation for wetland recovery and flood effect were conducted for the area around Dongting Lake. The calculation was based on the flood data obtained between 15^th June and 31^th August in 1998, and the water level and runoff data from five hydrological observation stations in Yichuang, Zhijiang, Shashi, Jianli and Luoshan for the Yangtze River, and other six stations in Nanzui, Xiaohezui, Yuanjiang, Lujiao, Yueyang and Chenglingji around Dongting Lake, among which there were only water level data for Yuanjiang, Lujiao and Yueyang. Through the calculation, the effect of cultivation and silts on flooding was estimated. It was revealed that for the period from 1952 to 1998, the effect on the rise of water level was 2 to 10 times higher as by the cause of silts than by cultivation.

关 键 词：洞庭湖 洪水 淤积围垦 

分 类 号：P426.616[天文地球—大气科学及气象学]