川中丘陵区遂宁组母质侵蚀与治理技术研究

Study of Erosion on Parent Rock of Suining Group in Hilly Area of Middle Sichuan Province and Harness Techniques

遂宁市中区母质侵蚀面积 5 9 9km2 ,属极强度侵蚀区。母质颗粒淤塞水道、淤毁农田及塘库埝工程 ,降低了工程防洪灌溉效益。遂宁组母质易风化 ,风化后的碎屑黏聚力弱、结构力差 ,易遭受径流侵蚀。治理遂宁组母质侵蚀 ,应实行治标与治本相结合 ,采用水平沟、鱼鳞坑等工程整地 ,沿山坡修筑排洪沟、建沉沙凼与蓄水池 ,并进行工程护坡处理 ,因地制宜建立果梯 ,护坡缝间、果梯埂坡宜栽植串叶松香草、蓑草。

The middle region of Suining city is belong to extreme severe soil erosion region with parent material erosion area of 59.9 km 2. The eroded parent material grains cause sedimentation and block in channels and destroy farmland, ponds and reservoirs and other projects, leading to lowering the effects of flood prevention and irrigation of the projects. Parent material of Suining group is easy eroded, and the erosion material is of poor cohesion and structure and even easier being eroded by runoff. In order to control erosion on Suining parent material, it should combine treatments aiming at both the appearance and root causes, apply leveling ditches, fish scale pitches in land preparation, construct flood delivery channel, ponds for sedimentation and water storage, and at the same time, implement slope protection measures, build orchards and terrace fields according to local conditions, plant varieties of soil conservation grass such as rosin grass and so on along the sides of slope protection, orchard and terrace ridge.