| 正义峡径流变化与人类活动影响分析 |
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| 关键词:runoff variation human activity Zhengyixia valley |
| 基金项目:国土资源部专项基金项目(编号:200010301-04) |
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| 摘要: |
| An Analysis of Runoff Change and Effects of Human Activities in Zhengyixia Valley |
| A contrast analysis was made on the variation of residual runoff materials at Zhengyixia valley in the light of long-term observation data and impacts of the Human activities. The results indicate that the runoff amounts at Zhengyixia valley depend on water from the upper reaches and irrigation water in the middle reaches, and that there exist variations of different stages and increasing water depletion in recent years. The decrease of runoff amounts results from increasing consumption of river water and excessive exploitation of groundwater, decreasing recharge of groundwater and decreasing baseflow from springs. The spring water is a main component part of runoff at Yingluoxia valley, which accounts for 63% of the total runoff amount. However, relatively great differences of runoff components exist in different periods of a year, and the runoff may account for 100% in the intense water-use period. Therefore, it is especially important to keep stability of river water and protect the ecological environment in the lower reaches by decreasing consumptive water utilization in the middle reaches and accumulating groundwater and spring water. |
| LIU Shao-yu,LU Yao-ru,CHENG Xu-xue.2005.An Analysis of Runoff Change and Effects of Human Activities in Zhengyixia Valley[J].Acta Geoscientica Sinica,26(1):61-66. |
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