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评价一个小流域治理的成效,主要应从两个方面来衡量:一是看土地生产率是否提高;二是看土壤侵蚀量是否降低。土地生产率的高低是衡量小流域治理成效的经济指标,但过去有不少地区土地生产率的提高是通过掠夺性的生产方式,以破坏土地资源为代价换来的。故单纯看土地生产率的高低,还不能完全说明小流域治理成效的优劣。反之,若单纯考虑减少
Evaluation of the effectiveness of a small watershed governance, mainly from two aspects to measure: First, to see whether land productivity increased; second is to see whether the amount of soil erosion decreased. The level of land productivity is an economic indicator to measure the effectiveness of small watershed management. However, in many areas, the increase of land productivity in the past has been achieved through the predatory mode of production in exchange for the destruction of land resources. Therefore, simply looking at the level of land productivity can not fully explain the advantages and disadvantages of the effectiveness of small watershed management. Conversely, if only consider reducing