甘肃长江流域水土保持经济效益分析

运用水土保持综合治理效益计算方法（GB/T15774—2008）计算了甘肃省长江流域的水土保持综合治理经济效益，系统评价了各措施对研究区带来的经济效益。结果表明:甘肃长江流域梯田、水保林、经济林、人工种草经济效益分别为58.08亿元，180.02亿元，29.69亿元，15.2亿元，合计282.99亿元；同时，通过实施坡改梯工程，甘肃省长江流域累计节约土地面积25.96万hm²，节约劳工2 216.9工日。另外，随着水土保持的综合治理研究区的治理面积、年增产量、年净增产值以及累积净增产效益均表现出逐年递增的趋势，且水保林在水土保持综合治理中发挥着至关重要的作用。

Analysis on Economic Benefit of Soil and Water Conservation in Yangtze River Basin in Gansu Province

We calculated the economic benefit of comprehensive harness of soil and water conservation in Yangtze River Basin using the method of calculating the benefit of comprehensive harness of soil and water conservation (GB/T15774—2008), and systematically evaluated the economic benefits of the measures in the study area. The results show that the economic benefit of terraced fields, forest of soil and water conservation, trees of economic value and artificial grass planting are 5.808 billion yuan, 18.002 billion yuan, 2.969 billion yuan, 0.152 billion yuan, respectively, the total is 28.299 billion yuan; at the same time, through the project of terrance in the study area accumulated land area of 259 600 hm² was saved and 2 216.9 man-days of labors were saved in Yangtze River Basin in Gansu Province. In addition, with comprehensive control of soil and water conservation the management area in the study area, annual increment, net production value and the cumulative net production efficiency show the trend of increasing year by year, and forest of soil and water conservation plays an important role in comprehensive control of soil and water conservation.