五雷山生态公益林对小流域洪水过程的影响  

Influence of ecological forest on surface funoff in watersheds of Wulei Mountains

作　　者：田育新[1] 李锡泉[1] 牛艳东[1] 杨楠[1] 陈业银 王中建 

机构地区：[1]湖南省林业科学院,湖南长沙410004 [2]慈利县林业局,湖南慈利427200

出　　处：《湖南林业科技》2011年第5期18-21,共4页Hunan Forestry Science & Technology

基　　金：湖南省林业厅重点项目(生态公益林效益监测)

摘　　要：以五雷山生态公益林区女儿寨小流域为研究对象,采用长期定位监测的方法,研究了生态公益林对小流域洪水过程的影响。结果表明:小流域洪水年的森林覆盖率Fi(%)与洪水滞后时间差Hi始(min)、洪峰滞后时间差Hi峰(min)、洪峰流量Wi峰(m3/s)均以一元线性关系藕合最为密切,Fi=a+bHi(始、峰)(Wi峰),a、b为常数;女儿寨小流域森林覆盖率每增加1个百分点,洪水始发滞后降雨时间差就延长4.289 2 min,洪峰滞后于降雨时间差就延长6.979 7 min,洪峰流量减小0.045 5 m3/s。Based on the research of Nuer-viUage small watershed in Wulei Mountains researched by long-term methods, the influence of ecological forest on surface runoff in watersheds were analyzed. Results show that the forest coverage Fi （ % ） of flood years have closely coupled with linear relationship among flood lag time difference ttistart （ rain）, flood peak lag time difference Hipeak （ rain）, peak discharge Wistart （m3/s）, respectively, Fi = α ＋ b Hi（start,peak） （ Wipeak ） , a, b are constants. When the forest coverage of Nuer-vil- lage small watershed increased one point, the time difference of the floods originating extend 4. 289 2 min and flood peak lagged behind rainfall extend 6. 979 7 minutes, and the peak flow reduced 0. 045 5 m3/s.

关 键 词：洪水过程 小流域 生态公益林 

分 类 号：S715.3[农业科学—林学]