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| 健康水循环理念下异龙湖流域灌区水资源优化配置研究 |
| Study on optimal allocation of water resources in Yilong Lakeirrigation area under the concept of healthy water circulation |
| 投稿时间：2024-09-10 修订日期：2024-11-16 |
| DOI： |
| 中文关键词: 水资源配置 健康水循环 外流域调水 NSGA-II 熵权-Topsis 异龙湖 |
| 英文关键词:Water resources allocation healthy water cycle external basin water transfer NSGA-II entropy weight -Topsis Yilong Lake |
| 基金项目:国家自然科学基金NSFC-云南联合基金(U2202207) |
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| 中文摘要: |
| 异龙湖是云南九大高原湖泊中流域面积最小、水资源供需矛盾最突出、内源性污染最严重的浅水型湖泊。为有效缓解异龙湖流域灌区水资源供需矛盾、逐步扭转湖泊的半封闭状态并促进湖泊水质的持续性改善,本文以异龙湖为纽带,充分挖掘流域内可利用的再生水资源,通过湖内提水替换清洁灌溉水源、利用湖滨湿地净化湖周低污染水,增加清洁入湖水量,从而构建异龙湖流域健康水循环体系,并依托构建的水资源优化配置模型实现异龙湖流域灌区多水源的优化配置。研究结果表明：在不同降水保证率(50%、75%、95%)下,现状年缺水量分别约为477.5万m3、563万m3、665.2万m3,对应缺水率分别为20.3%、22.3%、24.2%；通过水资源优化配置,各降水保证率下灌区缺水量可分别减少至409.83万m3、476.96万m3、626万m3；基于健康水循环体系下多水源优化配置,各降水保证率下灌区缺水量进一步减少为153.64万m3、168.6万m3、316万m3,缺水率降至6.5%、6.6%、11%。同时基于健康水循环体系下的多水源优化配置方案可加快湖泊水体的循环与交换,不同降水保证率可削减入湖COD224.4t、194.7t、194.9t,对湖泊水质持续性改善具有较好的推动作用。该研究以健康水循环理念为指引构建的水资源优化配置体系,可为高原湖泊治理以及环湖灌区水资源优化配置提供新的思路。 |
| 英文摘要: |
| Yilong Lake is the shallow water lake with the smallest basin area, the most prominent contradiction between water supply and demand, and the most serious endogenous pollution among the nine plateau lakes in Yunnan. In order to effectively alleviate the contradiction between supply and demand of water resources in the irrigation area of Yilong Lake Basin, gradually reverse the semi-closed state of the lake and promote the sustainable improvement of the water quality of the lake, this paper takes Yilong Lake as a link, fully taps the available renewable water resources in the basin, replaces the clean irrigation water source by extracting water from the lake, uses lakeside wetlands to purify the low-pollution water around the lake, and increases the amount of clean water into the lake. Therefore, the healthy water circulation system of Yilonghu Basin is constructed, and the optimal allocation of multi-water sources in the irrigation area of Yilonghu Basin is realized based on the optimal allocation model of water resources. The results show that under different precipitation guarantee rates (50%, 75%, 95%), the current annual water shortage is about 4.775 million m3, 5.63 million m3, 6.652 million m3, and the corresponding water shortage rates are 20.3%, 22.3%, 24.2%, respectively. Through the optimal allocation of water resources, the water shortage of irrigation areas can be reduced to 4,098,300 m3, 4,769,600 m3 and 6.26 million m3 respectively under each precipitation guarantee rate. Based on the optimal allocation of multiple water sources under the healthy water circulation system, the water shortage of the irrigation area under each precipitation guarantee rate is further reduced to 1,536,400 m3, 1,660,000 m3, 3,160,000 m3, and the water shortage rate is reduced to 6.5%, 6.6%, and 11%. At the same time, the multi-water source optimal allocation scheme based on the healthy water circulation system can accelerate the circulation and exchange of lake water, and reduce the COD224.4t, 194.7t, 194.9t into the lake, which has a good role in promoting the sustainable improvement of lake water quality. The optimal allocation system of water resources based on the concept of healthy water circulation can provide new ideas for the treatment of plateau lakes and the optimal allocation of water resources in the irrigation area around lakes. |
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