安家沟小流域综合治理效益评价

Evaluation of comprehensive management benefits of Anjiagou small watershed in Dingxi,Gansu

采用层次分析法,对安家沟小流域5年的综合治理效益进行了分析和评价。结果表明,2005年较2001年,流域综合效益指标值提高了168.57%,生态效益值增加了56%;流域内植被覆盖率由2001年的10.1%增加到2005年的21.3%,水土流失治理度由72.6%增加到84.0%,土壤侵蚀模数由4627 t/(km2.a)下降到1300 t/(km2.a);农业投入产出比由2001年的0.95降低到2005年的0.82,劳动生产率由8074元/(人.a)提高到9167元/(人.a),土地生产率由267元/667 m2增加到343元/667 m2,平均增幅为28.46%;流域内人均纯收入从2001年的1620元增加到2005年的1748元,提高了7.9%。据此认为,通过实施一系列治理措施,流域内生态、经济和社会效益均有不同程度的提高,流域生态环境和农业生产环境发生了很大变化,人民生活水平有了显著改善,农林牧各业得到了协调发展,小流域的生态经济和社会复合系统正在向持续、稳定和协调的方向发展。

Using the analytic hierarchy process（AHP）,the benefits were analyzed and evaluated,of comprehensive management of Anjiagou small watershed in Dingxi,Gansu during 2001-2005.In Anjiagou small watershed,the comprehensive benefit value increased 168.57% and the ecological benefit value improved 56% during the 5 years from 2001 to 2005;the vegetation coverage increased from 10.1% in 2001 to 21.3% in 2005,the control degree of soil and water loss improved from 72.6% to 84.0%,the modulus of soil erosion decreased from 4 627 t/（km^2·a） in 2001 to 1 300 t/（km^2·a） in 2005;the agricultural input-output ratio decreased from 0.95 to 0.82,the productivity of labor increased from 8 074 yuan /person per year to 9 167 yuan/person per year,the land productivity improved from 267 yuan/667 m^2 to 343 yuan/667 m^2,and the average increasing rate was 28.46%;the rural per capita net income improved from 1 620 yuan in 2001 to 1 748 yuan in 2005,and increased by 7.9%.Based on the result,it was regarded that： through carrying out a series of management measures,the ecological,economic and social benefits in Anjiagou small watershed were all increased to some extent;the ecological and agricultural production environments were obviously improved;the living standard of local people were remarkably elevated;the harmonious development trend of agriculture,forestry and animal husbandry has come into being;the ecological economy and social multiplex system in Anjiagou small watershed were developing towards sustainable,steady and harmonious trend.