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首页> 外文会议>International Yellow River Forum on Keeping Healthy Life of the River vol.4; 20051021-24; Zhengzhou(CN) >The Characteristics and Cause Analysis of Erosion Sediment in Rainstorm - based Flood in the Compared Watersheds in Sub - area 3 of Loess Plateau -Taking the Storm on 'June 15,2001' in Gullies of Qiaozidonggou and Qiaozixigou as Example
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The Characteristics and Cause Analysis of Erosion Sediment in Rainstorm - based Flood in the Compared Watersheds in Sub - area 3 of Loess Plateau -Taking the Storm on 'June 15,2001' in Gullies of Qiaozidonggou and Qiaozixigou as Example

机译：黄土高原3区小流域暴雨型洪水侵蚀泥沙特征及成因分析-以乔子东沟，乔子西沟沟壑区2001年6月15日暴雨为例

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摘要

The 2 compared watersheds, Qiazidonggou and Qiaozixigou 2 adjacent gullies, are the level 4 sub - branches of Yellow River located on sub - area 3 of Loess Plateau. Since 1988 the Qiaozidonggou has been taken into erosion control program , the Qiaozixigou has been as the contrast, meanwhile their soil and water data have been observed. This paper analyses the characteristics of the rainfall, flood and sediment of the 2 watersheds based on the data observed on June 15, 2001 and field survey. The conclusions are that, under the little difference condition of rainfall, the characteristics of runoff and sediment of the 2 watersheds are significantly different. Compared with Qiaozixigou, the cutting down rate of peak flood of Donggou is up to 66.9% , unit's area reduces flood amount 13,336 m~2/km~2, reduce sediment amount 8,534 t/km~2, the sediment decreased by 8, 534 t/km~2 in Qiaozidonggou. Although the variety trend of runoff and sediment in both gullies are the same, but the variety ratios in the Qiaozixigou are larger than that in Qiaozidonggou, the erosion modulus in Qiaozidxigou was 3.5 times of that in Qiaozidonggou. The reduction efficiency of flood and sediment are 59.9% and 79.5% respectively in Qiaozidonggou on contrast, that in Qiaozixigou are 6.9% and 8.4%, the erosion control measures in Qiaozidonggou bring into play of runoff and sediment reduction significantly.
机译：比较的2个流域，齐子东沟和桥子沟2个相邻的沟壑，是黄土高原3区的黄河4级支流。自1988年起将桥子东沟纳入侵蚀防治方案，以桥子西沟为对照，同时观察了其水土流失数据。本文根据2001年6月15日观测到的数据和实地调查，分析了这两个流域的降雨，洪水和沉积物的特征。结论是，在降雨差异不大的情况下，两个流域的径流和泥沙特征存在显着差异。与桥子西沟相比，东沟洪峰减洪率高达66.9％，单位面积减少洪水量13,336 m〜2 / km〜2，减少泥沙量8,534 t / km〜2，泥沙减少8，534。桥子洞沟t / km〜2。虽然两个沟渠的径流和泥沙变化趋势相同，但桥子西沟的径流比大于桥子东沟，但桥子西沟的侵蚀模数是桥子东沟的3.5倍。桥子东沟的防洪减沙效率分别为59.9％和79.5％，桥子西沟的防洪减沙效率分别为6.9％和8.4％，桥子东沟的水土流失防治措施显着发挥了径流和减沙作用。

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