Integrated erosion control measures and environmental effects in rocky mountainous areas in northern China

Based on observations of runoff plots and field investigations of gully cross-sections, impacts of various soil and water conservation measures on runoff and sediment yield are analyzed for different rainfall conditions. The results show that antecedent rainfall and rainfall intensity are the main f...

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Bibliographic Details
Published in:International journal of sediment research 2010-09, Vol.25 (3), p.294-303
Main Authors: HE, Jijun, CAI, Qiangguo, LI, Guoqiang, WANG, Zhongke
Format: Article
Language:English
Subjects:
Antecedent rainfall
Cumulated erosion amount
Erosion control
Gullies
Gully head protection
Rainfall
Rainfall character
Runoff
Sediments
Soil (material)
Soil erosion
Vegetation
Water conservation
中国北方
土壤侵蚀过程
山区环境
径流小区
水土流失
综合防治
降雨条件
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Summary:Based on observations of runoff plots and field investigations of gully cross-sections, impacts of various soil and water conservation measures on runoff and sediment yield are analyzed for different rainfall conditions. The results show that antecedent rainfall and rainfall intensity are the main factors affecting the runoff and soil erosion processes. Rainfall events with antecedent rainfall can produce high runoff and sediment yield. Large differences in the characteristics of two rainfall events will result in greater variations of total runoff and sediment yield from the same runoff plot. Under the same soil control measure and rainfall condition, soil and water conservation measures can reduce the impacts of antecedent rainfall and rainfall intensity on runoff and soil erosion. Among various measures, level terrace seems to be the greatest for soil conservation purposes. Combining with engineering measures,Vegetation measures is also effective in controlling runoff and soil erosion. In the initial stage of vegetation enclosure measures, engineering measure is necessary to improve the environment for ecological recovery. Gully head protection can control gully erosion effectively, but the effectiveness of gully head protection would be reduced when rainfall intensity increases. Therefore, the design of a gully head protection structure must be based on local hydrological conditions.
ISSN:1001-6279
DOI:10.1016/S1001-6279(10)60046-7