摘要
河道整治工程使福山水道水力条件发生变化,采用平面二维水力水质模型MIKE21进行研究,分析了在现状水力条件作用下,丰枯水期和支流引排水不同的工况下,福山水道水域的TP、TN和COD Mn随时间迁移扩散的质量浓度变化及分布情况;在此基础上,计算福山水道的综合营养状态指数(TLI)分布,结果显示支流排水及排水结束后水道内水域呈中—轻富营养状态。由此表明:在福山水道水动力条件弱,水体交换缓慢的状态下,全年中的春秋及初夏,在水道上段的局部水域,容易导致藻类暴发,引起水华现象。此结论为该水道后期管理与治理提供科学依据及决策支撑。
The river regulation project has changed the hydraulic conditions of Fushan Waterway.The 2-D hydraulic and water quality model MIKE21 was used to simulate the spatio-temporal variations of TP,TN and COD Mn in the current hydraulic conditions under different conditions such as flood or dry seasons,water diversion and drainage.On this basis,the distribution of comprehensive trophic state index(TLI)was calculated and the results showed that the water area in the waterway was in a medium-light eutrophic state during and after tributary drainage.The above conclusions indicated that under the condition of weak hydrodynamic conditions and slow water exchange in Fushan Waterway,algae may erupt and cause water bloom in spring,autumn,and early summer.This conclusion provides scientific basis and decision supports for the later management and harnessing of this waterway.
作者
邹霞
ZOU Xia(Shanghai Ecological Environment Scientific Research Center,Yangtze River Basin Ecological Environment Supervision and Administration Bureau,Ministry of Ecological Environment,Shanghai 200120,China)
出处
《环境生态学》
2023年第2期13-22,共10页
Environmental Ecology
关键词
福山水道
水质模拟
富营养化
MIKE21
水力条件
Fushan Waterway
water quality simulation
eutrophication
MIKE21
hydraulic conditions
