Threshold phenomenon of sediment reduction beneficials from soil-water conservation measures in the Wudinghe river
文献类型：EI期刊论文
| 作者 | Xu Jiong-Xin |
| 发表日期 | 2006 |
| 英文摘要 | Based on the period 1956 - 1969 taking as a 'baseline' period for the Wudinghe river basin, a multiple regression equation is established between the annual sediment yield and some indices of the precipitation characteristics, and used to calculate the sediment yield in the measure period (1970 - 1993), assuming there are no soil-water conservation measures. Then the annual sediment reduction beneficials, defined as the percentage of sediment reduction of the sediment yield without soil-water conservation measures, is calculated, and its temporal variation is plotted. The curve indicates that the soil-water preservation beneficats is a non-linear variation, which can be divided into three stages: (1) the increasing slowly; (2) increasing rapidly; and (3) remaining unchanged or even decreasing. The relationships are plotted between the sediment reduction beneficials and the areas of the soil-water conservation measures such as land terracing, tree- and grass-planting and the land created through check dams. It also shows the non-linear variations which can be fitted by the two straight lines with different slopes. The turning point between the two straight lines can be regarded as a threshold of the area of the soil-water conservation measures, and the two straight lines represent a high-return area and a low-return area of the sediment reduction beneficials, respectively. The curve can provide some useful information for the soil-water conservation planning in the studied area. |
| 出处 | Shuikexue Jinzhan/Advances in Water Science
 |
| 卷 | 17期:5页:610-615 |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/24466]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Xu Jiong-Xin. Threshold phenomenon of sediment reduction beneficials from soil-water conservation measures in the Wudinghe river. 2006. |
入库方式： OAI收割
来源：地理科学与资源研究所
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