摘要
降低换水周期可以有效抑制水华的发生,但是要达到理论平衡换水周期,城市水体所需换水量将受到当地城市水资源承载力的限制,导致其实用性不佳。为探究更加直接实用的水动力抑藻条件及其应用机理,通过建造环流河道模型,并利用推进装置调控河道模型内水流速度,研究基于指定换水周期的不同流速对水华的抑制机理。基于合肥环城水系的水流状况和通过直流河道模型得到的平衡换水周期,设定环流河道模型的换水周期为10 d时,实验结果表明,河道模型内平衡流速为80 cm/min。说明河道模型中平衡流速是存在的,而且在水华发生的理化因素均满足的情况下,运用水动力条件来抑制水华发生的方法是可行的。根据模拟得到的水动力数据,提出了存在和不存在换水周期两种模式下的水质模型。
Reducing the water exchange cycle time can effectively inhibit the growth of algae;however,due to the limitation of the carrying capacity of local urban water resource on the quantity of exchanged water of urban water bodies,it is not practical to reach the theoretical equilibrium water exchange period.In order to explore a more direct and practical hydrodynamic condition for inhibition of algae growth and its application mechanism,we constructed a circulation channel model and used propelling configuration to regulate the water velocity in the circulation channel model,to study the algae growth inhabitation 'mechanisms of different water velocities with 'a given water exchange cycle.When the water exchange period of the circulation channel model was set to 10d in accordance to the flow condition of the water system around the city of Hefei and the equilibrium water exchange period obtained through the straight channel model,the experiment results showed that the equilibrium flow velocity (EFV)was 80cm/min,which indicated that EFV of the channel exists and it was feasible to control "algal growth by utilizing hydrodynamic condition under the condition that all the chemical and physical factors of occurrence of algal were satisfied.According to the hydrodynamic data obtained from the simulation,two water quality models with and without water exchange period were proposed respectively.
作者
黄鹏
田腾飞
张文安
秦松岩
刘钰
吕小佳
HUANG Peng;T.IAN Teng-fei;ZHANG Wen-an;QIN Song-yan;LIU Yu;LV Xiao-jia(College of Environmental Science and Safety Engineering,Tianjin University of Technology,Tianjin 300380.,China;North China Munieipal Engineering Design and Research Institute Co.,Ltd,Tianjin 300074,China)
出处
《环境工程》
CAS
CSCD
北大核心
2018年第12期64-69,共6页
Environmental Engineering
基金
水体污染控制与治理科技重大专项:海绵城市建设与黑臭水体治理技术集成与技术支撑平台(2017ZX07403001)
天津市自然科学基金重点项目(16JCZDJC39800).
关键词
平衡流速
藻类
景观水体
环流河道
模型
equilibrium flow velocity
algae
landscape water system
circulation channels
model
