铁杉多水库系统为康涅狄格州西南部的一个大型配水区供水。该系统由铁杉水库（直接水源）、Aspetuck水库和Saugatuck水库（大型深水库）组成。Aspetuck和铁杉水库的流域排水为软水，而Saugatuck水库及其流域由硬水组成。该系统为研究软硬水系统之间的相互作用提供了机会。供水方面的挑战包括避免蓝藻、甲基异龙脑和地奥蛋白在底栖蓝藻席上产生的浮游植物水华、厌氧呼吸产物的积累，以及无意引入的陆地种群对生态和水质的影响- 我的妻子。本文描述了为解决铁杉系统中的这些问题而采取的各种水库管理方法。这些措施包括分布的深水释放和储水库的深度选择性释放，避免铁和锰的积累，使用人工循环系统，以及通过鱼类放养进行生物操作。包括数字。

The Hemlocks multiple reservoir system provides water for a large distributionarea in southwestern Connecticut. This system consists of the Hemlocks Reservoir (the direct source), Aspetuck Reservoir, and Saugatuck Reservoir (a large, deep reservoir). The watershed drainage to Aspetuck and Hemlocks Reservoirs is soft water, while Saugatuck Reservoir and its watershed consist of hard water.This system provides an opportunity to study the interactions between hard and soft water systems. Water supply challenges included avoidance of phytoplanktonic blooms of Cyanobacteria, methylisoborneol and geosmin production by benthic Cyanobacteria mats, accumulation of anaerobic respiration products, and both ecological and water quality impacts of an unintentionally introduced population of land-locked alewife. This paper describes the various reservoir management approaches that have been taken to solve these problems in the Hemlocks system. These include deep water releases from the distribution and depth-selective releases from the storage reservoir, avoiding accumulation of iron and manganese, use of an artificial circulation system, and biomanipulation by fish stocking. Includes figures.