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为深入评价小流域综合治理和水土保持措施对土壤侵蚀的影响,制定下一步规划方案提供参考资料。利用聚类分析、相关分析等方法对四川省“长治”五期工程涉及的212个小流域水土保持措施和土壤侵蚀状况进行分类并分析其耦合关系,结果表明:水土保持措施聚为4类,以封禁治理、保土耕作措施为主的3类地区有146个小流域,占总量的68.9%。土壤侵蚀聚为4类,以无明显侵蚀、轻度侵蚀为主的4类、一类地区共有158个小流域,占总面积的74.6%。水土保持措施与土壤侵蚀之间的关系为:以封禁治理和保土耕作措施为主的地区无明显流失面积较大,这两种措施防治水土流失效果明显。
In order to further evaluate the impact of comprehensive management of small watershed and soil and water conservation measures on soil erosion, develop plans for the next step to provide reference materials. The cluster analysis and correlation analysis were used to classify and analyze the soil and water conservation measures and soil erosion in 212 small watersheds involved in the Phase 5 of Changzhi Project in Sichuan Province. The results showed that the soil and water conservation measures were clustered into 4 There are 146 small watersheds in three types of areas mainly covered by banning management and tillage measures, accounting for 68.9% of the total. There are four types of soil erosion, which are mainly no obvious erosion and slight erosion. There are 158 small watersheds in one area, accounting for 74.6% of the total area. The relationship between soil and water conservation measures and soil erosion is as follows: there is no obvious area for loss in the areas dominated by embargo and tillage measures, and these two measures are effective in controlling soil and water loss.