Watersheds

Island County Watersheds used for the Surface Water Quality Monitoring Program. This layer does not include coastal drainages and smaller watersheds. This layer was created in the Planning Department using 2001 LiDAR between 2005 and 2008. Ground truthing edits were made through 2012.本图层为用于地表水水质监测项目的艾兰县（Island County）流域集水区。该图层未涵盖沿海排水区及小型流域集水区。本图层于2005年至2008年间由规划部门利用2001年采集的激光雷达（LiDAR）数据编制完成，并于2012年前完成了地面验证修正工作。