加州水资源部的一份事实说明书估计，在2015年至2020年期间，大约有2700万加州人依赖三角洲获取饮用水。它还指出，许多人可能不知道他们的水来自哪里。三角洲是数百万亩农业用地的重要水源，也是美国西海岸最大的河口。然而，该文件指出，过去150年里，三角洲经历了广泛的栖息地丧失，一些自然栖息地类型的面积下降了超过90%。
A California Department of Water Resources fact sheet estimated that about 27 million Californians relied on the Delta for drinking water during the 2015–2020 period. It also noted that many people may not have known where their water came from. The Delta is an important source of water for millions of acres of agriculture and is the largest estuary on the West Coast. However, the document notes that the Delta has experienced extensive habitat loss over the past 150 years, with some natural habitat types declining by more than 90%.
加州于2015年启动了EcoRestore计划，旨在推动三角洲、苏伊森沼泽和约洛旁洪道地区至少3万亩关键栖息地的恢复和改善。该事实说明书作为这一目标的追踪记录。它设定了超过3万亩的目标，并估计规划和已完成的恢复项目总计近38500亩，这一数字可能会被修订。潮汐和次潮汐栖息地是最大的类别，规划或已完成的面积近14000亩，目标为9000亩。
California launched the EcoRestore initiative in 2015 to advance at least 30,000 acres of critical habitat restoration and enhancement across the Delta, Suisun Marsh, and Yolo Bypass region. The fact sheet serves as a tracking record for this objective. It sets a target of more than 30,000 acres and estimates nearly 38,500 acres across planned and completed restoration, a figure that could be revised. Tidal and subtidal habitat is the largest category, with nearly 14,000 acres planned or completed against a goal of 9,000 acres.
洪泛平原恢复估计为18580亩，目标为17000亩。河岸和陆地栖息地估计为1650亩，目标为超过1000亩。非潮汐湿地预计将达到3500亩的目标。湿地对鱼类的重要性这些数据通过对栖息地的说明变得更加清晰。事实说明书解释说，潮汐湿地是指因潮汐而交替被淹没和排干的沼泽，加州EcoRestore计划旨在发展这些湿地，以支持三角洲小鳞鱼和鲑鱼等鱼类的食物来源。
Floodplain restoration is estimated at 18,580 acres against a goal of 17,000. Riparian and upland habitat is estimated at 1,650 acres against a goal of more than 1,000. Non-tidal wetlands are expected to reach their goal of 3,500 acres. Wetland importance for fishThe figures speak more clearly with an illustration of the habitat. Tidal wetlands are marshes that are alternately flooded and drained by the tides and, the fact sheet explains, the California EcoRestore program was intended to develop these wetlands to support food sources for fish such as salmon and Delta smelt.
流动的水有助于鱼类摄取浮游动物——这些微小生物以死亡的植物残渣为食，而高大的植物则可以为鱼类提供躲避捕食者的掩护。
Moving water helps fish reach zooplankton, microscopic organisms that feed on dead plant matter, while tall plants can provide cover from predators.
项目亮点之一是所洛诺县的Lookout Slough，这是位于三角洲的一个3,400英亩的栖息地恢复项目。该项目于2024年9月18日通过现场堤坝决口而完成。加州州长加文·纽瑟姆的办公室宣布，潮汐水域首次在100年后流入所洛诺县的3,400英亩恢复栖息地。官员们当时将其描述为三角洲地区规模最大的潮汐恢复项目。加州水资源部表示，该项目为周边中央谷地社区提供100年防洪保护，并在约洛旁洪泛区提供超过40,000英亩英尺的额外防洪储存。
One of the projects highlighted in the program was Lookout Slough in Solano County, a 3,400-acre habitat restoration project in the Delta. The project was completed on September 18, 2024, with the breaching of a levee at the site. The office of Governor Gavin Newsom announced that tidal waters were flowing to 3,400 acres of restored habitat in Solano County for the first time in 100 years. Officials described it as the largest tidal restoration project in the Delta at the time. The California Department of Water Resources said the project provides 100-year flood protection for surrounding Central Valley communities and more than 40,000 acre-feet of additional flood storage within the Yolo Bypass.
施工始于2022年6月，包括超过3英里长、25英尺高的后退堤坝，旨在应对未来海平面上升，此外还有26英里的开放潮汐通道。公私合作伙伴关系加州水资源部还描述了标志着项目完成的堤坝决口。该项目源于该部门与生态系统投资合作伙伴之间的合作，该机构表示该项目从概念到施工的推进时间不到六年。当天的堤坝决口移除了旧堤坝上的600英尺泥土，使其成为项目东侧计划中的九个决口中规模最大的一个。
Construction began in June 2022 and included more than 3 miles of 25-foot-tall setback levees, designed to allow for future sea-level rise, along with 26 miles of open tidal channels. Public-private partnershipThe California Department of Water Resources also described the levee breach that marked the project's completion. The project resulted from a partnership between the department and Ecosystem Investment Partners, and the agency said it progressed from concept to construction in less than six years. That day's levee breach removed 600 feet of dirt from the old levee, making it the largest of the nine breaches planned along the project's eastern edge.
水资源部部长卡拉·内梅斯表示，防洪与自然并不冲突，而自然资源部长韦德·克劳福特则称该项目是恢复工作的一个重要里程碑。完工后的场地也设计用于公众使用。所有决口完成后，公众可通过北侧决口处的非机动船坡道进入新通道，进行野生动物观赏、钓鱼和狩猎。
Department Director Karla Nemeth said flood protection is not at odds with nature, while Natural Resources Secretary Wade Crowfoot described the project as a significant milestone for the restoration effort. The finished site was also designed for public use. Once all breaches were complete, the public could access the new channels through a non-motorized boat ramp at the northernmost breach for wildlife viewing, fishing, and hunting.
该部门还将 Lookout Slough 列为全州 100 多个由其主导或支持的项目之一，旨在创造栖息地并保护特殊状态物种。事实表强调，恢复工作不会在施工结束时终止。栖息地恢复项目需要持续的运营和维护，而合作伙伴关系，尤其是公私合作伙伴关系，被确定为该项目头五年期间额外恢复工作的重要来源。3,400 英亩的 Lookout Slough 项目代表了推动三角洲、苏伊森沼泽和约洛旁通道地区至少 30,000 英亩栖息地恢复的更广泛努力中的重要部分。
The department also identified Lookout Slough as one of more than 100 projects statewide that it leads or supports to create habitat and protect special-status species. The fact sheet emphasizes that restoration does not end when construction does. Habitat restoration projects require ongoing operation and maintenance, while partnerships, particularly public-private partnerships, were identified as important sources of additional restoration during the program's first five years. The 3,400-acre Lookout Slough project represents a significant part of the broader effort to advance at least 30,000 acres of habitat restoration across the Delta, Suisun Marsh, and Yolo Bypass region.