论文部分内容阅读
彰武县位于辽宁省西北部科尔沁沙地南部边缘,属沙化漫岗区。柳河从彰武县中部穿过,境内流程117km。彰武县春秋干旱,季风频繁,每年起沙风(5m/s)平均240次,6级以上大风达69次之多。从土壤侵蚀方式看,该区是水蚀、风蚀过渡区,以风蚀为主。1983年以前,由于不合理的耕作及过度放牧,该区植被稀少,沙化面积不断扩大,生产条件十分恶劣,“四料”俱缺,当地群众的温饱问题得不到很好解决。自1983年柳河上游被列为全国水土保持重点治理区以来,彰武县在柳河治理区内因地制宜地开展了大规模的综合治理。彰武柳河治理区包括县西北部的四堡子和满堂红两个乡,12个村,共9条小流域,面积266.4km~2,其中水土流失面积
Zhangwu County is located in the northwest of Liaoning Province Kerqin sandy southern margin of the sand, is a desertification Mange area. Liu River passed through the central Zhangwu County, the territory of the process 117km. Zhangwu County spring and autumn drought, monsoon frequent, annual sand (5m / s) an average of 240 times, 6 or more gale reaches 69 times. From the perspective of soil erosion, the area is a water erosion, wind erosion transition zone, mainly to wind erosion. Before 1983, because of unreasonable farming and overgrazing, the vegetation in this area was scarce, the area of desertification was expanding, the production conditions were very poor, the “four materials” were lacking, and the local people’s food and clothing problem was not well solved. Since the upper reaches of Liuhe River was listed as the key area for soil and water conservation in 1983, Zhangwu County has carried out large-scale comprehensive management in the Liuhe Governing Area according to local conditions. Zhangwu Liuhe governance area includes the four counties in the northwest of the county and two townships full of red, 12 villages, a total of 9 small watershed, an area of 266.4km ~ 2, of which soil erosion area