孤山川流域已有水土保持措施蓄水减沙效益计算成果分析

针对已有水土保持措施蓄水减沙效益计算成果存在同一流域同一时段差异较大的问题,以孤山川流域为例,介绍了已有水土保持措施蓄水减沙效益计算成果,在分析比较的基础上,认为其结果差异较大的原因是所采用的水土保持措施量和蓄水减沙指标不同引起的。为了解决差异,提高计算精度,今后要加强对基本资料、基本规律的研究,特别要加强对径流小区、小流域水土流失规律和水土保持效益的研究等。

Analysis on Keeping Water and Sand Reducing Benefit with Existed Measures of Soil and Water Conservation in Valley of Gushanchuan

To research the reasons why the existed measures of soil and water conservation bring the different benefit of soil and water conservation which are existing in the same valley and at the same time. We cite the data of Gushanchuan valley and introduce the existed effect,at the same time, we use the method of analysis and compare,in the end, we think the evident different effect is theresult of taking different number of measure and different keeping water and reducing sand index.To resolve the existing difference and enhance the accuracy,we will strengthen the research work of basic data and disciplinarian,especially for the research work in the small runoff watershed and the disciplinarian of soil erosion in small watershed and the benefit of soil and water conservation etc.