石马河泄洪与东江水利枢纽调节不同情景下东江水质的模拟与分析  

Simulation and analysis of water quality in Dongjiang River based on the different scenarios of flood discharge from Shima River and the regulation of Dongjiang Hydro-Project

作　　者：江涛[1] 钟鸣[1] 邹隆建 黎坤[1] 林波[1] 朱爱萍[1] 刘祖发[1] 

机构地区：[1]中山大学地理科学与规划学院,广东广州510275 [2]清远市水利枢纽建设管理处,广东清远511518

出　　处：《中山大学学报（自然科学版）》2016年第2期117-123,共7页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：广东省科技计划资助项目(2013B020700009);广东省水利科技创新资助项目(2011-10);国家自然科学基金资助项目(41371055)

摘　　要：以东江干流下游东江水利枢纽~石龙河段为研究范围,构建基于MIKE21的二维感潮河段水动力、水质模型,以氨氮为水质控制因子,模拟分析汛期石马河泄洪排污及东江水利枢纽不同水量调节情景下,东深供水工程东江取水口水质变化规律,结果表明：1受潮流影响,石马河各种泄洪流量情景下取水口氨氮浓度变化与潮位变化关系密切,显示出较为明显的大小潮变化的周期性;2涨潮过程是影响取水口水质的主要控制因素,氨氮浓度超标均发生在高高潮时;3石马河泄洪量愈大对东江水质影响愈大,东江水利枢纽水量调节对下游水质有明显的改善作用。结果可为汛期石马河橡胶坝与东深供水工程取水口联合调度及东江水利枢纽应急水量调度提供决策依据。In this study,a two-dimensional water dynamic and water quality model based on MIKE21 was developed to simulate the water quality at the intake of Dongshen water supply project. The study was carried out in the tidal reach between the Dongjiang Hydro-Project and Shilong in the downstream of the Dongjiang River,and NH3-N was taken as the water quality indicator. Different scenarios of flood discharge from the Shima River and the release discharge of the Dongjiang Hydro-Project were used to drive the model for the simulation of the water quality at the intake of the Dongshen water supply project. The results indicate that： 1 the change of the NH3-N concentration at the intake is related to the tidal change,the NH3-N concentration over-standard occurs during higher high water level period; 2 flood tide is the main factor which impacts the water quality at the intake,and the NH3-N concentration is more than 0. 5mg / L during higher high water lever period; 3 more flood discharge from Shima River has the greater effect on the water quality,and the water regulation of the Dongjiang Hydro-Project can cause a significant improvement on water quality in the downstream. The results of this study contribute to the decision-making for the joint operation of the flood discharge from Shima River and the intake of Dongshen water supply project,also have great significance for the emergency operation of the Dongjiang HydroProject.

关 键 词：水库调度 泄洪 MIKE21模型 石马河 东江 

分 类 号：X522[环境科学与工程—环境工程]