| 基于 GSFLOW 的青土湖生态输水量-湖水面积关系研究 |
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| 引用本文： | 郭云彤,周妍,崔亚莉,邵景力.基于 GSFLOW 的青土湖生态输水量-湖水面积关系研究[J].水文地质工程地质,2022,49(5):32-41. |
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| 作者姓名： | 郭云彤 周妍 崔亚莉 邵景力 |
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| 作者单位： | 中国地质大学(北京)水资源与环境学院, 北京 100083 |
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| 基金项目： | 国家重点研发计划项目（2017YFC04061） |
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| 摘 要： | 西北地区水资源匮乏，生态环境脆弱，如何科学处理生产用水与生态用水的关系一直是西北干旱区水资源开发利用中关注和研究的热点难点课题之一。关于流域中上游生态输水与尾闾湖水域面积（或湿地面积）关系的定量化研究较少。以我国西北干旱区河西走廊石羊河流域的尾闾湖—青土湖为例，利用GSFLOW建立了区域地表水-地下水耦合模型，其中采用...
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| 关 键 词： | 青土湖 生态输水-水面面积关系 数值模拟 地下水-地表水耦合模型 |
| 收稿时间： | 2022-03-15 |
A study of the relationship between ecological water conveyance and water surface area of the Qingtu Lake based on GSFLOW |
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| Affiliation: | School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China |
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| Abstract: | Water resources are scarce and ecological environment is fragile in the arid regions of northwest China. How to scientifically deal with the relationship between production water and ecological water has always been one of the hotspot and difficult issues in the field of water resources development and utilization in northwest arid areas. However, there are few quantitative studies on the relationship between the ecological water conveyance from the middle and upper reaches of the basin to the downstream terminal lake (wetland) and the area of the terminal lake (wetland). In this paper, Qingtu Lake, the terminal lake of the Shiyang River Basin in Gansu Province, is taken as an example. A coupled model of surface water and groundwater is established using GSFLOW software, among which, LAK module and SFR2 module are used to treat the lake and water channel, respectively. Based on this, the changes of surface area of the Qingtu Lake under different ecological water conveyance schemes are predicted. The appropriate range of ecological water conveyance to the Qingtu Lake is determined. The results show that the current ecological water conveyance of 3100×104?m3/a can ensure the highest water level of Qingtu Lake of 1212.23?m (the average water level of 1211.68 m) and the corresponding water surface area of 16.27?km2. The relationship between ecological water conveyance and water surface area is as follow. When the water delivery is in the range of 2000×104?3700×104?m3/a, the water surface area increases obviously and the area change rate is relatively stable with the increase of water conveyance; when the water delivery is in the range of 3700×104?4500×104?m3/a, the increasing water surface area gradually decreases and the area change rate gradually decreases with the increasing water conveyance; and when the water conveyance is more than 4500×104?m3/a, the increase of water surface area with the increasing ecological water conveyance is very small, especially when the ecological water conveyance is more than 5500×104?m3/a, the change rate of water surface area tends to 0. Considering the demand for maintaining the current water surface area of the Qingtu Lake and the benefits of ecological water conveyance, the ecological water conveyance volume from the Hongyashan reservoir to the Qingtu lake should be in range of 3100×104?4500×104?m3/a. The results are of certain reference value in determining the local ecological water demand and maintaining the coordinated and sustainable development of local ecology, economy and society. |
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