董事会成员一览
2024年6月26日
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State_Water_Project_Draft_05132024
Northern Sierra snowpack, photo courtesy of California Department of Water 资源
国家水利工程
从 the Northern Sierra to Southern California
When the 国家水利工程 was constructed in the 1960s and 70s, Metropolitan became the system’s largest contractor, importing up to 2 million acre-feet of water per year to our Southern California service area. Although the SWP on average provides about 30% of the water used in the region, the amount of water we have imported from Northern California from year to year has widely fluctuated over the past decade due to the rapidly changing climate and increasingly extreme weather patterns. Regulations designed to protect fish species and water quality also have played a role in the limited availability of SWP supplies that pass through the 萨克拉门托-圣华金三角洲.
Metropolitan is engaged in projects and re搜索 that promote the health and sustainability of this region and the vital estuary at its heart. 我们的行动是由我们的信念所引导的 《湾三角洲政策纲要, which was adopted by our board in 2022.
Bouldin Island, 萨克拉门托-圣华金三角洲
共享三角洲:
Balancing Ecosystem Health, 水的供应 Reliability & 社区
的 Delta is the central hub of California’s water delivery system, 但它对我们的经济也至关重要, a number of endangered native fish species and the quality of life for millions of Californians. Balancing these diverse interests is the challenge of regulators, 水资源管理者, biologists and many others interested in the health of the environment and our water delivery system.
的 amount of water that can be pumped out of the Delta for delivery to cities and farms in the south every year depends not only on the amount of snowpack runoff from the Sierra Mountains, but also on the condition of the Delta’s ecosystem and fisheries. 三十年来, regulators have increasingly restricted deliveries in an effort to protect endangered species in the Delta, 包括德尔塔的味道.
To support ecosystem health, as well as water reliability, Metropolitan purchased a number of 三角洲岛 in 2016. As a responsible landowner and conscientious neighbor, we have committed to science-based watershed management, multi-benefit environmental initiatives and community-based partnerships with island stakeholders and throughout the region.
Pacific Flyway, 萨克拉门托-圣华金三角洲
三角洲基础设施面临风险
At the heart of the SWP water delivery system is the Delta, 一个复杂的水道网, 融化, 运河和岛屿, where freshwater from California’s two largest rivers meets saltwater from the Pacific. 但三角洲也面临风险.
Levees vulnerable to sea-level rise and earthquakes, more extreme weather patterns associated with climate change and the declining health of the Delta ecosystem all threaten the reliable delivery of water supplies through the Delta.
大堤决口，图片由DWR提供
气候变化
Extreme weather associated with climate change may severely reduce SWP supplies available to Metropolitan in future years. Existing water quality and minimum flow regulations mean that during intense drought periods, very little SWP supplies may be delivered to Southern California.
海平面上升
Rising sea levels will not only put more pressure on the Delta’s dirt and peat levees; they also push seawater further into the Delta, 影响水质, and threatening intake pumps that draw water out of the Delta and into the California Aqueduct, for delivery to cities and farms in the south. 的 levees are especially vulnerable as they sit only a few feet above sea level.
土壤沉降
In the 1850s, the Delta was transformed from a marsh into farmland, using levees to hold back water. 这一活动暴露了泥炭土, 哪些正在迅速蒸发, causing land levels to drop and turning the islands into bowls entirely dependent on the levees for preservation. 随着下沉的继续, 堤坝上的水压增加了, putting them at greater risk of collapse, which would draw seawater toward the Delta’s freshwater pathway.
地震
With several faults running through the region, the U.S. Geological Survey estimates a 72% percent chance of a magnitude 6.7 earthquake hitting the Bay Area in the next 30 years. This could cause widespread failures along the 1,100 miles of levees that surround 三角洲岛, allowing seawater to enter and render the freshwater that travels between the levees undrinkable for months, 甚至是几年.
渔业下降
Various endangered species call the Delta home. Regulators’ efforts to protect these species have largely focused on cutting back water exports from the SWP, although numerous scientific investigations have attributed the decline in the Delta’s ecosystem health to various causes.
萨克拉门托-圣华金三角洲
拟议的三角洲运输工程
政府. Gavin Newsom's 三角洲交通工具 Project proposes to modernize the state's water infrastructure in the Delta to increase water supply reliability for 27 million Californians.
拟建项目 is distinct from previous efforts to develop an alternative path to move water across the Delta region. Identified as the Bethany Reservoir alignment, the project would carry water from two new intakes on the Sacramento River in the north Delta and through a tunnel that nearly parallels Interstate 10 to the Bethany Reservoir situated at the start of the California Aqueduct.
拟建项目, 容量为6,000立方英尺每秒, would allow for the capture of water supplies during particularly wet periods. 在干燥和一般条件下, state project supplies would continue to move through the Delta, 就像他们188bet棋牌平台做的那样.
In December 2023, the California Department of Water 资源 released its 最终环境影响报告 进行三角洲运输工程. 阅读都市的 声明 最终EIR的发布.
Metropolitan’s board and water leaders across the state will use the state's Environmental Impact 报告 进行三角洲运输工程, 以及其他信息, such as the state’s benefit-cost analysis, to determine how to best invest our resources in response to a changing climate, while also supporting the state’s coequal goal to protect, 恢复和加强三角洲生态系统.
On May 16, 2024, the Department of Water 资源 released a 成本估算和效益成本分析. 读 大都会的声明.
到目前为止, Metropolitan’s board has voted to support funding the district’s share of environmental planning and pre-construction costs, joining other 国家水利工程 Contractors. 董事会的 最近一次投票 是在2020年12月.
而DCP正在考虑中, Metropolitan has been meeting with diverse voices within the Delta - including NGO, 部落, academic and government agencies - to identify common interests and improve reliability in the Delta.
环境影响报告
Bethany Reservoir, photo courtesy of DWR
After launching the environmental review process in January 2020, the EIR草案 was released in July 2022 for public comment. 的 最终报告 was released by the California Department of Water 资源 in December 2023. This report evaluates and identifies potential environmental impacts of the proposed project and alternatives and will allow Metropolitan to conduct its own analyses and beginning in mid-2024 evaluate the potential costs and benefits of the project in support of our board’s decision-making process.
A 社区福利计划框架 was included in the Final Environmental Impact 报告, signaling DWR’s commitment to ensuring benefits for the Delta community and providing an opportunity for the public to comment on the concepts included in the framework.
通过最终EIR认证, the 社区 Benefits Program will officially become part of the proposed 三角洲交通工具 Project under consideration by Metropolitan’s board and other water leaders across the state.
在未来的几个月, DWR will negotiate permits in compliance with the California Endangered Species Act and federal Endangered Species Act, as well as a Change in Point of Diversion from the State Water 资源 Control Board to ensure the new north Delta intakes would be operated to meet current laws, 法规和保护.
地盘水库工程
站点水库是一个拟议的1.5 million acre-foot off-stream reservoir in the Sacramento Valley that would capture stormwater flows from the Sacramento River after all other water rights and regulatory requirements are met, 城市利益最大化, agricultural communities and the environment. 在南加州, this translates to improved supply reliability in drought years, especially for our communities that are dependent on the 国家水利工程 as well as reduced risk of depleting Southern California’s groundwater supplies.
自2017年以来, Metropolitan has invested about $31 million into the planning, permitting and environmental review effort for Sites Reservoir. 任何 future investment would need to be considered by Metropolitan’s board.
Proposed location of Sites Reservoir, photo courtesy of DWR
资源
佩里斯湖，图片由DWR提供
