Inland river terminal lake preservation: determining basin scale and the ecological water requirement

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• 作者：Jianhua Si ; Qi Feng ; Tengfei Yu ; Chunyan Zhao
• 关键词：Inland lake ; Ecological water demand ; Juyan Lake ; Heihe River ; Water diversion
• 刊名：Environmental Earth Sciences
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：73
• 期：7
• 页码：3327-3334
• 全文大小：778 KB
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• 刊物类别：Earth and Environmental Science
• 刊物主题：None Assigned
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-6299

文摘

Inland lakes are a major water resource for arid regions. Determining basin scale is therefore an important indicator of variability for water resources in such regions. The goal of this study was to ascertain the appropriate Juyan Lake basin scale and its minimum ecological water requirement for the lake’s continued preservation. This was accomplished in three parts. First, an analysis was carried out on the inflow of the lower reach of Heihe River and any subsequent water surface area change to Juyan Lake. Second, an optimum Juyan Lake basin scale was determined by establishing existing relationships between reservoir capacity and lake area, water level and lake area, and variation in lake area during different times of the year. Third, the ecological water requirement of the lake was determined. Results showed that the decrease in surface runoff and ceased flow of the channel resulted in the drying up of the terminal lake of Heihe River. It was determined that 35.6?km2 is the most stable Juyan Lake surface area, and 0.55?×?108?m3 is the minimum replenishment quantity in which to maintain Juyan Lake throughout the year without it drying up.