| 摘要: |
| 为探讨砒砂岩地区毛沟的形成机理,以内蒙鄂尔多斯市东一支沟小流域2005～05地形及毛沟特征要素详细测量数据为基础,分析了该流域的毛沟分布规律。结果表明,该流域毛沟数量和单位面积毛沟长度从下游到上游呈递增趋势;按毛沟的成因将其划分为自侵式毛沟和汇入式毛沟两类,并从毛沟数量、沟底比降、毛沟长度、沟底宽、沟深等方面分析了这两类毛沟的主要特征。研究结果有利于深化人们对砒砂岩地区小流域毛沟侵蚀特性的认识。 |
| 关键词: 砒砂岩 毛沟侵蚀 毛沟特征要素 自侵式毛沟 汇入式毛沟 |
| DOI： |
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| 基金项目:国家自然科学基金项目（50479067） |
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| Analysis of rill erosion characteristics for small watershed in soft rock area |
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| Abstract: |
| To investigate the formation mechanism of rills in soft rock area,the paper focused on the geographical and rill characteristics of Dongyizhigou small watershed 200505 in Erdos,Inner Mongolia,and analyzed the distribution law of rills in this watershed.The results showed that the average quantity of rills and the rill length per unit area in this watershed increased from lower reach to upper reach;and the rills in this watershed could be divided into two types according to their formation cause:self-eroded rill and confluent rill.Finally,the distribution and main characteristics of these two type's rills were analyzed in aspects such as the number,ditch slope,length,width and the depth of rill.To sum up,the findings are beneficial to the recognition of rill erosion characteristics for small watershed in soft rock area. |
| Key words: soft rock,rill erosion,rill characteristics,sel-eroded rill,confluent rill |
