康特拉科斯塔水区（CCWD）仅从三角洲（delta）供水 由萨克拉门托河和圣华金河汇合而成，然后排入河流 太平洋。由于三角洲内的水源水质随季节和季节变化显著 目前，CCWD采用多方面的运营战略，以优化给定成本的成本效益 运营和水质相关限制的数量。使用了两个关键的操作工具 为实现这一目标:洛斯瓦克洛斯水库（LV）； 以及复杂的盐度外流 模型（G-model），基于内部开发的数值模拟范式 工作人员战术管理也严重依赖于协调，而不仅仅是关键 CCWD内部不同部门的工作人员，以及CCWD和几个 州和联邦机构。这一策略使CCWD能够提供可靠的高质量 以对环境负责的方式，以尽可能低的成本提供优质水。包括2个参考文献、表格和图表。

The Contra Costa Water District (CCWD) delivers water exclusively from the river delta (Delta) formed by the confluence of the Sacramento and San Joaquin Rivers prior to discharge into the Pacific Ocean. Since source water quality within the Delta varies significantly with season and tide, CCWD employs a multi-faceted operating strategy to optimize cost-effectiveness given a number of operational and water quality related constraints. Two key operational tools are used to achieve this objective: Los Vaqueros Reservoir (LV); and, a sophisticated salinity-outflow model (G-Model), which is based on a numerical simulation paradigm developed by in-house staff. Tactical management is also critically dependent upon coordination, not only between key staff members in different departments within CCWD, but also between CCWD and several State and Federal agencies. This strategy allows CCWD to provide a reliable supply of high quality water at the lowest cost possible, in an environmentally responsible manner. Includes 2 references, tables, figures.