City of Seattle, Seattle Public Utilities, Riparian Restoration 2001-current, Cedar River Municipal Watershed, King County, WA

The City of Seattle’s Cedar River Municipal Watershed is managed to support and supply clean drinking water to the greater Seattle area. The watershed covers 91,000 acres, hosts a rich diversity of plants, animals, and habitats, and is owned by the City of Seattle. In 2001 the City of Seattle prepared a multi-species Habitat Conservation Plan (HCP) to comply with the federal Endangered Species Act and to address a variety of related natural resource issues in the Cedar River Watershed. As defined in the HCP, the riparian zone is the area adjacent to surface waters and areas of high groundwater levels where the terrestrial system both influences, and is influenced by, the aquatic system. The City’s strategies for the riparian ecosystem are designed to protect the region’s supply of high-quality drinking water, to preserve and enhance stream and riparian ecosystems within the municipal watershed, and to restore and rehabilitate stream and riparian functions. This package includes as-builts from riparian restoration projects, shapefiles of planting locations, and their associated monitoring data. The data is a result of monitoring that occurred after installation of riparian restoration projects in the Cedar River Municipal Watershed. The monitoring data includes plant survivorship but varies by project in what information was collected. The monitoring data was collected by multiple people over many years. Some projects were monitored for several years after project installation and some projects were monitored only once. Some projects included experimental plantings that were assigned a variety of treatments to test the efficacy of different planting strategies. In this instance, the monitoring data can be used to identify the success of the various strategies. Monitoring tabular data will be updated as more restoration projects are installed, and as previously installed projects receive continued monitoring.

西雅图市雪松河城市集水区（Cedar River Municipal Watershed）的管理宗旨为保障大西雅图地区的清洁饮用水供应。该集水区总面积达91000英亩，孕育了丰富多样的植物、动物类群与栖息生境，其所有权归西雅图市所有。2001年，西雅图市编制了多物种生境保护计划（Habitat Conservation Plan，HCP），以满足联邦《濒危物种法》的合规要求，并解决雪松河集水区内各类相关自然资源议题。根据该HCP的界定，河岸带（riparian zone）指毗邻地表水与高地下水位区域的陆地区域，在此范围内陆地生态系统与水生生态系统双向互作：前者既影响后者，同时也受后者调控。西雅图市针对河岸生态系统制定的管理策略，核心目标包括保护本地区优质饮用水供应，保护并优化城市集水区内的溪流与河岸生态系统，以及修复与恢复溪流及河岸生态系统的功能。本数据包包含河岸修复项目的竣工实测图（as-builts）、种植点位的形状文件（shapefiles）及相关监测数据。该数据源于雪松河城市集水区内河岸修复工程完工后的监测工作。监测数据涵盖植物存活率指标，但不同项目的采集信息项存在差异。监测数据由多名工作人员历经多年采集完成：部分项目在完工后被持续监测数年，部分项目仅开展了单次监测。部分项目设置了实验性种植组，通过施加多种处理措施以测试不同种植策略的实施效果。在此场景下，本监测数据可用于评估各类种植策略的实际成效。随着更多修复工程的落地，以及对已完工项目的持续监测，监测表格数据将持续更新。