咸潮影响河段取水水源可靠性的分析

Reliability analysis of water intake sources in river reaches affected by salty tides

为分析咸潮河段取水水源可靠性,通过建立潭江一维河网水质数学模型和实测资料分析结合的方法对银洲湖纸业基地潭江取水口布置进行探讨。一维河网水质数学模型采用上游设计枯水流量遭遇下游典型潮的计算方案,并在枯水期对取水口上下游河段氯离子质量浓度进行了同步实测。计算分析结果表明:潭江取水口取水流量可靠,满足设计保证率取水要求,取水水质也基本满足要求,但在P=97%特枯年份受咸潮影响情况下会出现短时段氯离子超标现象。在采取一定取水风险的规避措施情况下,该取水口取水水源是可靠的。

In order to analyze the reliability of water intake sources in the river reaches affected by salty tides, a one- dimensional mathematical model of water quality in the river network combined with the measured data in the Tanjiang River was used to investigate the layout of the water inlet of the Tanjiang River at the Yinzhou Lake Paper Base. The scheme for calculating the design low flow upstream meeting the typical tide downstream was employed, and the concentration of chlorine ions in the river reaches upstream and downstream of the water inlet during the low flow period was measured simultaneously. The calculation results show that the intake flow at the water inlet of the Tanjiang River was reliable, and it met the design reliability requirements. The water quality generally met the requirements, except in extraordinarily dry years （P = 97 % ） when the river was affected by salty tides and chlorine ions exceeded standards for a short period. The water sources of the water inlet will be reliable if certain measures are taken to avoid risks in water intake.