正确理解和描述配水库的水质行为对于确保满足监管要求至关重要。现场采样可以作为一种诊断工具，加快发现问题、评估问题范围、决定可能的解决方案以及评估所选方案的有效性的过程。本文描述了在加利福尼亚州阿祖萨市进行的水库水质广泛抽样研究。重点放在更好地了解水力混合动力学和水库中的游离氯残留浓度分布。研究结果显示，水库接近完全混合（CSTR）行为。这一表述的两个例外是某种程度的简短- 入口和出口之间的回路（这显著影响T10时间）和水库中央核心的滞流区的存在，其中混合较少，导致水变老。这些结果支持了储层分层或划分的假设。作者建议定期进行现场采样，以便于对配水系统水质进行有效管理。特别是，储层的内部采样可以提供有用的信息，而这些信息是无法通过其他方式推断出来的。

Proper understanding and characterization of water quality behavior in distribution storage reservoirs is critical to ensure meeting regulatory requirements. Field sampling can serve as a diagnostic tool to expedite the processes of detecting problems, assessing their scope, deciding among possible solutions, and evaluating the effectiveness of the selected option. This article describes an extensive sampling study of reservoir water quality conducted in Azusa, California. Primary emphasis was placed on providing a better understanding of the dynamics of hydraulic mixing and free chlorine residual concentration distribution in the reservoir. The results of the study showed a reservoir that approached completely mixed (CSTR) behavior. The two exceptions to this representation were a degree of short-circuiting between the inlet and outlet (which significantly affected the T10 time) and the presence of a stagnant zone in the center core of the reservoir where there was less mixing and resulting older water. These results support the assumption of stratification or partitioning in reservoirs. The authors recommend that field sampling be conducted regularly to facilitate the effective management of distribution system water quality. In particular, interior sampling of reservoirs can provide useful information that could not be inferred otherwise.