GUO Lingmei,WANG Keqin,SU Bei,et al.Rill Erosion in Slope Farmland in Jianshan River Small Watershed[J].Research of Soil and Water Conservation,2015,22(02):12-16.
尖山河小流域坡耕地的细沟侵蚀研究
- Title:
- Rill Erosion in Slope Farmland in Jianshan River Small Watershed
- Keywords:
- Jianshan River small watershed; slope farmland; rainfall; rill erosion
- 分类号:
- S157.1
- 摘要:
- 开展坡耕地细沟侵蚀的研究，对搞清坡面土壤侵蚀规律，促进坡耕地水土保持具有十分重要的意义。通过定位观测和野外调查资料分析，研究了尖山河小流域坡耕地细沟侵蚀的发展过程。结果表明：坡耕地产生细沟后，随着侵蚀性降雨的继续，坡面细沟向坡下侵蚀加长，细沟密度逐渐增大，细沟不断加深加宽，细沟侵蚀量也不断增加。细沟发展至其深度达到犁底层后，将基本趋于稳定。细沟侵蚀深度一般不超过30 cm，宽可达35 cm，而大多数细沟深度小于15 cm，宽度小于20 cm。由细沟侵蚀产生的年土壤侵蚀量可达到8 700 t/km2以上。
- Abstract:
- The research for rill erosion in slope land has the very vital significance to clarify the slope soil erosion, to promote farmland soil and water conservation. The analysis on location observation and field investigation data was carried out to study the development of rill erosion process on the slope in Jianshan River small watershed. The results showed that after the generation of rill in slope farmland, the slope rill erosion lengthened along the slope, rill density increased gradually, the rill became wide and deep, and rill erosion was also increasing under the erosive rainfall. With the accelerating development of rill, rill depth increased. After developing to the depth of the plough, the rill was stable basically. According to statistics, rill erosion depth was generally less than 30 centimeters, its width can be up to 35 cm, and most of the rill depths were less than 15 cm, width was less than 20 cm. Soil losses produced by rill erosion could reach more than 8 700 t/km2.
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备注/Memo
收稿日期:2014-04-01;改回日期:2014-05-30。
基金项目:国家自然科学基金（30660037）；西南林业大学水土保持与荒漠化防治重点学科建设项目
作者简介:郭玲梅(1987-),女,云南宣威人,硕士研究生,主要研究方向为土壤侵蚀。E-mail:15198791135@163.com
通讯作者:王克勤(1964-),男,甘肃庄浪人,博士,教授,博士生导师,主要从事山区小流域环境综合治理的理论与技术研究。E-mail:wangkeqin7389@sina.com