| 三峡水库出库流量变化对洞庭湖定居性鱼类产卵生境的影响 |
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| 引用本文： | 戴凌全,张培培,常曼琪,陈磊,李翀,戴会超,毛劲乔.三峡水库出库流量变化对洞庭湖定居性鱼类产卵生境的影响[J].河海大学学报(自然科学版),2023,51(5):38-45, 96. |
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| 作者姓名： | 戴凌全 张培培 常曼琪 陈磊 李翀 戴会超 毛劲乔 |
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| 作者单位： | 中国长江三峡集团有限公司长江生态环境工程研究中心,北京100038;三峡工程鱼类资源保护湖北省重点实验室,湖北 宜昌443100;河海大学水文水资源与水利工程科学国家重点实验室,江苏 南京210098 |
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| 基金项目： | 国家重点研发计划项目(2022YFC3204205,2022YFC3201802)；国家自然科学基金青年科学基金项目(52109013) |
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| 摘 要： | 为分析三峡水库消落期不同出库流量与洞庭湖定居性鱼类产卵生境加权可利用面积之间的关系，选取水深和流速作为定居性鱼类产卵生境的关键影响因子，建立生境适宜性曲线，基于物理栖息地模型定量评估鱼类产卵生境适宜性的空间变化特征，并量化鱼类产卵所需的适宜生态流量。结果表明：三峡水库消落期增加出库流量对洞庭湖的水位及流速有一定的提升作用，对东洞庭湖的影响明显，对南洞庭湖和西洞庭湖的影响较小；随着三峡水库出库流量的增加，湖区定居性鱼类产卵生境的加权可利用面积呈现先增大再减小的趋势，不同湖区的加权可利用面积变化趋势及对三峡水库出库流量的响应情况具有显著差异，东洞庭湖定居性鱼类产卵生境的加权可利用面积呈现逐渐上升的趋势，南洞庭湖加权可利用面积总体增长幅度不大，呈现双峰曲线，西洞庭湖加权可利用面积呈现先增大后减小的趋势；定居性鱼类产卵生境的适宜生态流量范围为18 500～24 500 m3/s,最适宜生态流量为22 500 m3/s。
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| 关 键 词： | 三峡水库 洞庭湖 定居性鱼类 物理栖息地模型 生态调度 |
| 收稿时间： | 2022/9/9 0:00:00 |
Effect of outflow from Three Gorges Reservoir on spawning habitat of sedentary fish in Dongting Lake |
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| DAI Lingquan,ZHANG Peipei,CHANG Manqi,CHEN Lei,LI Chong,DAI Huichao,MAO Jinqiao.Effect of outflow from Three Gorges Reservoir on spawning habitat of sedentary fish in Dongting Lake[J].Journal of Hohai University (Natural Sciences ),2023,51(5):38-45, 96. |
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| Authors: | DAI Lingquan ZHANG Peipei CHANG Manqi CHEN Lei LI Chong DAI Huichao MAO Jinqiao |
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| Affiliation: | Yangtze Eco-environment Engineering Research Center, China Three Gorges Corporation, Beijing 100038, China;Hubei Key Laboratory of Three Gorges Project for Conservation of Fishes, Yichang 443100, China;State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | To analyze the relationship between different outflows from Three Gorges Reservoir (TGR) during the drawdown period and the weighted usable area (WUA) of sedentary fish spawning habitat in Dongting Lake, the water depth and flow velocity were selected as the key influencing factors of sedentary fish spawning habitat, and the habitat suitable curves were established. This study quantitatively assessed the spatial variation characteristics of fish spawning habitat suitability based on the physical habitat simulation model (PHABSIM), and quantified the suitable ecological flow required for the fish spawning. The results show that the increase of outflow from TGR during the drawdown period has a certain effect on the water level and flow velocity of Dongting Lake. The effect on East Dongting Lake is obvious, but the effects on South Dongting Lake and West Dongting Lake are less. With the increase of outflow, the WUA of sedentary fishes spawning habitats in the lake area first increased and then decreased, whilst the difference is that the WUA of East Dongting Lake shows a gradual upward trend, the WUA of South Dongting Lake has a small overall increase with a double-peak curve, and the WUA of West Dongting Lake shows a trend of decreasing after increasing. The suitable ecological flow range of sedentary fishes spawning habitat was 18 500-24 500 m3/s, and the optimum ecological flow is 22 500 m3/s. |
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| Keywords: | Three Gorges Reservoir Dongting Lake sedentary fish physical habitat simulation model ecological operation |
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