BAI Hua,MU Xing-min,WANG Shuang-yin.Impact of Soil and Water Conservation on River Flow of Tuwei River[J].Research of Soil and Water Conservation,2010,17(01):40-44.
水土保持措施对秃尾河径流的影响
- Title:
- Impact of Soil and Water Conservation on River Flow of Tuwei River
- Keywords:
- rainfall; run-off; soil and water erosion; soil and water consevation; similar rainfall; Tuwei river; the Loess Plateau
- 分类号:
- S157.2;P333.1
- 摘要:
- 在黄土高原地区,水土保持措施是影响流域产汇流的重要因素之一.本文采用双累积曲线、时间序列分析等方法,分析秃尾河流域降水及河川径流、暴雨洪水特征变化及其对流域水土流失治理的响应.结果表明：流域多年平均降水量406.4mm,河道多年平均径流量3.4亿m3,1977年后年径流量呈显著性减小趋势.与1977年之前相比,在水土保持措施影响下,汛期径流量占年径流量比例下降,枯水期径流量比例上升,季节分配趋于均匀.相似降水条件下,场次洪水总量、洪峰流量减少,洪水过程均化.
- Abstract:
- In view of the factors affecting run-off,it is effective to reflect the soil and water conservation’s contribution to the run-off by analysis and comparison of changes in the run-off before and after soil erosion control.Based on the data of rainfall runoff storm and flood,the characters of rainfall runoff storm and flood in the catchment have been comprehensively analyzed through the method of Mann-kendall etc.According to the turning point of rainfall-runoff cumulative curve,the changes in the volume of runoff have been restored caused by the dynamic changes in precipitation and the changes in the run-off elements has been calculated owing to the water and soil conservation.The standard of judging the similar rainfall has been worked out,by which the changes of the flood’s elements and progress has been analyzed among different periods.Analysis showed:the turning point of the annual average flow sequence is in 1977.After this turning point,multi-year average runoff depth and proportion of run-off during the flood season decreases.Proportion of run-off during the dry season increases.The degree of inter-annual dramatic changes decline,the flood volume and peak flow has reduced and flood process has been averaged.
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备注/Memo
收稿日期:2009-8-16。
基金项目:中国科学院西部行动项目黄土高原退耕还林(草)环境效应与效益评价(KZCX2-XB2-05-03);“973”项目中国主要水蚀区土壤侵蚀过程与调控研究(2007CB407203)
作者简介:白桦(1986- ),男,硕博连读研究生,研究方向:生态水文、水土保持工程.E-mail:baihua1985@126.com
通讯作者:穆兴民(1961- ),男,博士,研究员,博士生导师,主要研究方向:水土保持、生态水文.E-mail:xmmu@ms.iswc.ac.cn