西北干旱区湖泊湿地生态系统稳定性评价——以宁夏银川市为例

Stability evaluation of lake wetland ecosystem in arid region of Northwest China—in Yinchuan city

用层次分析法对宁夏银川市湖泊湿地生态系统的稳定性进行了定量化评价,结果表明,对银川市湖泊湿地生态系统稳定性影响最大的准则层因子是人为因子,权重值为0.458,子准则层因子是政策法令,权重值为0.188;对银川市湖泊湿地稳定性影响,无论从准则层还是子准则层来看,人为因素和自然因素作用较大,其中,人为影响起主导作用.银川市湖泊湿地生态系统处于中度稳定性程度,整体处于良好状态,对其进行保护、恢复等正面干预具有可行性.可为银川市乃至整个西北干旱区生态建设及水资源安全建设提供参考.

The stability of Lake Wetland ecosystem is evaluated quantitatively in Yinchuan with the analytic hierarchy process （AHP）. The result shows that the maximal criteria-factor on stability of lake wetland ecosystem in Yinchuan city is human factors which weight is 0.458, and its sub-criteria level factor which weight is 0.188 is the policy act factor. The human factors and the natural factors all play the leading role in impacting the stability of lake wetland in Yinchuan, and the human factors are the leading factors. The Yinchuan lake wetland ecosystem is in moderate stability degree and the whole is in good condition, so it is feasible to protect and restore them. Research result can provide information not only for specific measures on stability strengthening of the lake wetland in Yinehuan city, but also for ecology and water resources in Yinchuan and the whole of arid region of Northwest China.