陈行水库在长江河口咸潮入侵期间的取水调度和库内氯度分布  

Chlorinity distribution and water intake operation of the Chenhang Reservoir during saltwater intrusions in the Yangtze Estuary

作　　者：申一尘 李路[2] 朱建荣[2] 

机构地区：[1]上海城投原水有限公司,上海200050 [2]华东师范大学河口海岸学国家重点实验室,上海200062

出　　处：《华东师范大学学报（自然科学版）》2012年第1期27-36,共10页Journal of East China Normal University(Natural Science)

基　　金：上海城投原水有限公司项目

摘　　要：在长江河口咸潮入侵严重期间,为保证供水,陈行水库有时会带盐取水.2009年11月27日至2010年3月12日在陈行水库进行了氯度观测.结合径流量、潮汐、风应力、上游氯度和取水口氯度,分析了长江河口咸潮入侵以及陈行水库3次带盐取水的运行方式和库内氯度的时空变化.数值模拟的结果表明,在东风作用下,水库东岸有上升流的存在.在咸潮到来前期,陈行水库增大取水量,使水库保持在高水位.在咸潮到来的初期,进行带盐取水,保证水库在较高的水位.在咸潮中后期,根据咸潮入侵的强弱向宝钢水库抽调适量淡水,同时当库内供水口氯度接近250 mg/L时必须停止从长江带盐取水.库内氯度资料表明水库带盐取水造成库内氯度升高,氯度的变化与风况有关,在空间存在差异性.陈行水库的调度与库内外的氯度密切相关,同时需要考虑库内的水位、上游氯度变化以及水库表面风场的变化情况.本研究可为河口水库的优化运行提供科学依据,同时为水库的调度管理提供经验.In order to supply water during severe saltwater intrusions in the Yangtze Estuary, the Chenhang Reservoir sometimes took brackish water. The chlorinity in the reservoir was measured during November 27 in 2009 to March 12 in 2010. Combined with the river discharge, water level, wind stress, chlorinity at the upstream station and its inlet, the saltwater intrusion in the estuary, the way of water intake operation, and temporallspatial variations of the chlorinity in the reservoir were analyzed. The simulated results showed that, the upstream was tended to be present around its eastern coastline under westward wind. Before the brackish water reached the reservoir, the amount of the water intake was increased to make it to high water level. At the beginning of a saltwater intrusion, the reservoir took the brackish water to keep its higher water level. In the later of the saltwater intrusion, some freshwater was taken from the Baogang Reservoir and the amount depended on the intensity of saltwater intrusion. Furthermore, the water intake from the Yangtze River must be paused when the chlorinity at the supply outlet in the reservoir was close to 250 mg/L. The measured data indicated that the chlorinity of the reservoir was increased when the brackish water intaking was conducted and experienced a spatial variation under different wind stresses. The water intake operation of the Chenhang Reservoir was dependent on the chlorinity insideloutside it. In addition, its water level, the chlorinity in its upstream as well as the wind stress should also he taken into account. This study can bring experience to the reservoirs built in estuaries for better operstion.

关 键 词：陈行水库 带盐取水 取水调度 氯度分布 

分 类 号：Q948[生物学—植物学]