感潮河网区白云湖水系生态环境补水研究  

Study on Ecological Water Supplement of Baiyun Lake Water System in Tidal River Network Area

作　　者：韦秋莹 刘丙军 WEI Qiu-ying;LIU Bing-jun(School of Civil Engineering,Sun Yat-sen University,Zhuhai 519082,China;Water Resources and Environment Research Center of Sun Yat-sen University,Guangzhou 510275,China)

机构地区：[1]中山大学土木工程学院,广东珠海519082 [2]中山大学水资源与环境研究中心,广东广州510275

出　　处：《水电能源科学》2023年第1期38-41,共4页Water Resources and Power

基　　金：广东省基础与应用基础研究基金联合基金重点项目(2019B1515120052);国家自然科学基金项目(52179029,51879289)。

摘　　要：感潮网河区水系交错、城市发达,高强度土地利用开发导致城市景观湖泊水环境污染严重,生态环境功能退化。以典型网河区城市景观湖体—广州市白云湖为例,构建二维水动力水质耦合模型,研究其生态环境需水及其补水方案。结果表明,基于MIKE21的二维网河区水动力水质耦合模型,能较好模拟城市景观湖泊水体水质输移规律,模拟值与实测值相对误差值均小于0.20,纳什效率系数均大于0.75;运用白云湖闸、泵水利工程联合调度补水,白云湖及其连通水系生态环境需水量保证率基本达到100%,TN及TP浓度均达到Ⅳ类水标准。研究成果可为感污河网区城市景观湖泊生态环境治理提供参考。The tidal river network area has the characteristics of criss-crossed water systems and developed cities. High intensity land use and development leads to serious hydrological pollution and degradation of ecological environment functions of urban landscape lakes. Taking the typical urban landscape lake in the river network area-Baiyun Lake in Guangzhou as the research object, this paper constructed a two-dimensional hydrodynamic and water quality coupling model to study its eco-environmental water demand and its water supplement schemes. The results show that the two-dimensional hydrodynamic and water quality coupling model in the river network area based on Mike21 can effectively simulate the temporal and spatial evolution law of water quality in urban landscape lakes, and the relative errors between the simulated values and the measured values are less than 0.20, Nash efficiency coefficients are greater than 0.75. By jointly using Baiyun Lake sluice and pump hydraulic engineering to dispatch and replenish water, the assurance rates of eco-environmental water demand of Baiyun Lake and its connected rivers are basically 100%, the contents of TN and TP meet the fourth class water quality. The research results can provide reference for ecological and environmental governance of urban landscape lake of polluted river network.

关 键 词：网河区 景观湖泊 水动力水质模型 生态补水 

分 类 号：TV213.4[水利工程—水文学及水资源]