Selected Environmental Characteristics of Sampled Sites, Watersheds, and Riparian Zones for the Puget Sound Stormwater Action Monitoring small stream status and trends project

Stormwater Action Monitoring (SAM) is a collaborative monitoring program between western Washington municipal stormwater permittees, state and federal agencies. SAM’s role is to use the results of regional monitoring and focused studies to inform policy decisions and identify effective strategies to improve stormwater management in the Puget Sound region. The SAM program includes status and trends monitoring of water quality, stream biota (macroinvertebrates, algae), and stream habitat to measure whether conditions are getting better or worse and identify patterns in healthy and impaired Puget Lowland streams. To meet this objective, a framework of fundamental geospatial data was required to develop physical and anthropogenic characteristics of the study region, sampled sites and corresponding watersheds, and riparian zones. This dataset comprises of 116 selected environmental characteristics for the 105 sites sampled for the SAM small stream study, and is one of the four fundamental geospatial data layers that were developed for this study. In addition, riparian zone boundaries for 16 reference sites in the Puget lowlands sampled by the Washington State Department of Ecology’s Ambient Biological Monitoring program from 2010 to 2015 were also digitized for this analysis to provide a regional context for the SAM study. In total, environmental characteristics for 121 total sites are provided in this data release.

雨水行动监测（Stormwater Action Monitoring，SAM）是华盛顿州西部市政雨水排放许可持有者、州级与联邦级机构合作开展的监测项目。SAM的核心职能是依托区域监测与专项研究的成果，为政策制定提供决策依据，并识别可有效改善普吉特湾地区雨水管理的可行策略。该项目涵盖水质、溪流生物群落（大型无脊椎动物、藻类）及溪流生境的现状与趋势监测，用于评估环境状况的优劣变化，并识别普吉特低地健康与受损溪流的分布模式。为实现该目标，本研究需构建基础地理空间数据框架，以刻画研究区域、采样点位、对应汇水区及河岸带的自然与人为属性特征。本数据集包含SAM小型溪流研究中105个采样点位的116项环境特征指标，是为本研究构建的四项基础地理空间数据图层之一。此外，为给本研究提供区域参照背景，本次分析还数字化了2010至2015年间，华盛顿州生态部环境生物监测项目在普吉特低地采样的16个参照点位的河岸带边界。本次数据发布共涵盖121个点位的环境特征信息。