摘要
陕南梯地垮坎，以黄褐土山地坡改梯最为严重，一般当年修的梯地在翌年雨季中有３０％～４０％梯坎出现崩塌或滑塌。从１９８９年以来，在陕南一些地方曾试验过挡板法、掺沙法和塑料编织袋法筑坎修地，但收效甚微。梯坎难以巩固的原因有六个方面：１．土壤含粘量高，排水能力差；２．雨多强度大；３．地面坡度陡；４．筑坎质量不高；５．排水系统不完善；６．没有采取植物护埂措施，甚至破坏地边埂。实践证明：任何单一措施都不能从根本上解决陕南土坎梯地垮坎问题，必须进行综合治理。应建立以排水固坎为中心，坡面工程措施与植物措施相结合，治理与开发相结合的综合防治体系，这是防治土坎梯地垮坎的有效途径。
The collapse of terrace-bank in South Shaanxi province,especially terracing on the slope with distribution of yellow cinnamon soil is serious. Generally,about 30%￣40% percent of the terrace conseructed in the year will collaps e orslide in the rainy-season in the next year. In some of places trial methods of conseructing terrace-bank such as retaining-plank,adding sand to clay soil,woven plastic bags have been tested and proved to be little effect. The reason which terrace-bank is difficult to stabilize are as follows: 1. Higher clay contents in soil and lower water drainge capacity; 2.Rich rainfall and high rainfall intensity; 3. Steep slope gradient; 4. No vegetation measures to protect terrace-bank even distroing the ridge of terraced field; 5. Poor construction quality of terrace-bank; 6. Imperfect water drainge system. It has been tentified by practie that no single measure can throughly solve the problem of collapse of terrace-bank in South Shaanxi province,and comprehensive harnessment is essential. It is an efficient way of controlling collapse of terrace-bank to establish comprehensive controlling system which focuses on water drainge and terrace-bank steadiness,combines slope control engineering with vegetation,combines harnessment with exploitation.
出处
《水土保持通报》
CSCD
北大核心
1994年第3期44-47,共4页
Bulletin of Soil and Water Conservation
关键词
陕南
土坎梯地
土壤侵蚀
防治
South Shaanxi
yellow cinnamon soil
terrace
control measures
