摘要
以宁化县常丰里和石壁溪小流域为例,从宏观监测和微观监测2个层面监测了常丰里和石壁溪小流域水土流失动态变化、植被自然演替状况、植被覆盖度、林草生长量,以及经济效益和社会效益等指标。该流域治理水土流失面积2 675 hm2,治理程度达到80.4%;综合治理措施保存率达80%以上;宜草宜林面积达80%以上;林草植被覆盖率从50.4%提高到56.0%;提高了防洪减沙效益,减沙率达70%以上;小流域土壤侵蚀模数从2 533 t/(km2·a)降低到1 500 t/(km2·a)以下。经过综合治理,流域内的水土流失面积、强度都已明显下降,取得了良好的治理效果。
With Changfengli and Shibixi watersheds in Ninghua county as study cases,from the macro and micro two aspects the dynamic change of soil and water losses,the condition of natural vegetation succession,vegetation coverage,trees growth rate,and the indexes of economic and social benefits in Changfengli and Shibixi watersheds were monitored.Management of the basin soil erosion area is 2 675 hm2,management level 80.4％,and comprehensive management measures conservation rate above 80％; appropriate grass and forest area of more than 80％; vegetation coverage rate increased from 50.4％ to 56.0％; improve the efficiency of the flood control and sediment reduction,sediment reduction rate is above 70％; watershed soil erosion modulus reduces from 2 533 t/（km2·a） to 1 500 t/（km2·a）.Through comprehensive management,soil erosion area and strength in the basin have been significantly decreased and good management efficiency achieved.
出处
《山西农业科学》
2014年第1期54-56,73,共4页
Journal of Shanxi Agricultural Sciences
基金
福建省科技重大专项专题项目(2012NZ0002-1)
关键词
水土流失
综合治理
水土保持
效益分析
小流域
宁化县
water/soil erosion
comprehensive management
water/soil conservation
managemental economical efficiency analysis
watershed
Ninghua county
作者简介
黄锦祥（1964-）,男,福建宁化人,农艺师,主要从事水土试验、小流域综合治理技术推广工作.
