NOAA/WDS Paleoclimatology - Stahle et al. 2001 San Francisco Bay Salinity Reconstruction

San Francisco Bay is one of the most important estuaries on the west coast of the Americas. Its water quality is controlled primarily by streamflow from the Sacramento and San Joaquin rivers. In fact, freshwater inflow from the Sacramento-San Joaquin Delta explains 86% of the salinity variability at the mouth of the San Francisco Bay estuary [Peterson et al., 1989]. The massive diversion of streamflow by the California State Water Project and the Central Valley Project, part of the largest manmade water control system on Earth [Reisner, 1988], has raised salinity in the estuary on daily, seasonal, and annual timescales [Nichols et al., 1986; Peterson et al., 1989].

旧金山湾是美洲西海岸最重要的河口湾之一。其水质主要受萨克拉门托河与圣华金河的径流量调控。事实上，萨克拉门托-圣华金三角洲的淡水输入量可解释旧金山湾河口湾口86%的盐度变化[Peterson等人，1989]。作为全球规模最大的人工水利调控系统之一[Reisner，1988]，加州州立水利工程与中央河谷工程对径流量的大规模截留，已在日、季、年时间尺度上推高了该河口湾的盐度[Nichols等人，1986；Peterson等人，1989]。