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The proposed Sites Reservoir would be a large offstream reservoir in the Sacramento Valley in Northern California, a project of the California Department of Water Resources. Its primary purpose is to collect winter flood flows from the Sacramento River, diverting the water upstream of the Sacramento–San Joaquin River Delta and pumping it into an artificial lake located west of Colusa. The estimated water yield would be between per year, depending on yearly rainfall and environmental regulations. The reservoir would be operated as part of the California State Water Project (SWP) and is projected to cost between US$2.3—3.2 billion.〔 According to a 2013 Bureau of Reclamation study, it would provide economic benefits of between US$248.8–276.2 million per year, while annual operating costs would be in the range of $10–20 million. The state Department of Water Resources received an approval to study water storage north of the delta in 1996, and more funding was approved every several years since then. As of 2014, US$52 million has been spent on studies. ==History== The first proposals for Sites appeared in the 1980s as part of the State Water Project's Stage II. Stage I, which comprised the project's primary features, including the Oroville Dam, California Aqueduct and associated hydroelectric plants and pumping stations, was completed during the 1960s to mid-1980s, to provide an annual water yield of . Stage II, which included Sites Reservoir, the Peripheral Canal and various proposals to divert other Northern California rivers was intended to bring the SWP to its full yield of . Due to political and environmental opposition, these projects have not been built. Sites Reservoir went through federal review in 1996 but did not receive authorization. However, the 21st century has experienced a growing threat of serious water shortfalls due to drought and rapid population growth in California; by 2020 the annual deficit of supply to demand could be as much as . Current studies refer to the reservoir officially as the North-of-Delta Offstream Storage Project. The DWR has noted that between 2002 and 2011, SWP water supply delivery reliability declined, and that NODOS could improve water supply reliability during drought periods (when operated in conjunction with existing reservoirs).〔http://www.water.ca.gov/storage/docs/NODOS%20Project%20Docs/NODOS_Prelim_Admin_Draft_EIR/00-ES-Executive_Summary_prelim_admin_draft_Dec2013_w_table.pdf〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sites Reservoir」の詳細全文を読む スポンサード リンク
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