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| 引哈济党工程对苏干湖湿地天然植被的影响 |
| Influence of the Yinhajidang Project on the Natural Vegetation in Sugan Lake Wetland |
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| DOI： |
| 中文关键词: 引哈济党工程 调水 影响预测 苏干湖湿地 |
| 英文关键词: Yinhajidang project Water diversion Impact prediction Sugan Lake wetland |
| 基金项目:国家发展和改革委员会“敦煌水资源合理利用与生态保护综合规划”课题基金资助项目（发改农经［2011］1498号） |
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| 中文摘要: |
| 根据Processing MODFLOW模型对调水后大苏干湖区面积和湿地地下水位的影响预测结果，初步确立引哈济党工程适宜调水量，并在各调水方案的基础上，以干旱区天然植被与地下水的定量关系为依据，分析预测地下水位下降对湿地天然植被的影响。结果表明：不同工况引水50 a后，大苏干湖湖泊面积减少均不超过8%；湿地地下水水位0 m～1 m区面积将持续下降，最大减少17 km2；湿地天然植被部分将发生演替，主要由湿生植被向中、旱生植被演变，影响集中在两湖间河道湿地及湿地外围边缘地带。 |
| 英文摘要: |
| According to the prediction of lake area and wetland groundwater level in Big Sugan Lake by Processing MODFLOW model after water diversion, the rational water quantity was preliminary confirmed. On the basis of each water diversion project, the impact of groundwater level decline on wetland natural vegetation was predicted by the quantitative relationship between natural vegetation and groundwater in arid region. The results showed that after 50 years of water diversion under different conditions, the area of Big Sugan Lake would decrease 8% at most, the area of 0 m～1 m wetland groundwater level would reduce continuously, to the maximum of 17 km2. Succession would occur at part of the wetland natural vegetation, mainly from wetland vegetation to mesoxerophytes, in the rivers between the two lakes and the periphery of the wetland. |
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