摘要
根据长江流域生态系统特点,把河流生态需水的重点定位于下游河段至河口区,选择盐的质量分数作为关键因子,提出了河道生态流量计算方法.建立大通至长江口外海一、二维耦合数学模型,采用实测资料对模型率定,模拟大通水文站不同来流量时长江口盐的质量分数空间分布规律.以维持长江口生态系统服务功能最大化为目标,选定盐的质量分数控制标准,分析得出长江大通站生态流量为10 000 m3/s.
After analyzing the characteristics of river ecosystem in humid areas,ecological flow of the lower reaches and estuary of the Yangtze River is studied.The method takes salinity as the key factor and aims at maintaining maximum service functions of river ecosystem.1-D and 2-D models considering tidal-currents and salinity from Datong section to Yangtze Estuary are established.After they are calibrated by field data,the models are used to describe salinity distribution under different incoming water amounts of Datong section.According to the selected salinity criterion,it is determined that the ecological flow in Datong section is 10,000 m^3/s.
出处
《水利水运工程学报》
CSCD
北大核心
2010年第3期53-58,共6页
Hydro-Science and Engineering
基金
"十一五"国家科技攻关计划资助项目(2006BAB14B06
2006BAB14B07)
"十五"国家科技攻关计划资助项目(2004BA610A-01)
南京水利科学研究院基金资助项目(Y50603)
关键词
服务功能
生态流量
长江
盐的质量分数
service functions
ecological flow
the Yangtze River Estuary
salinity
