Sensitive Area Ordinance Streams

For more information about this layer please see the GIS Data Catalog. Streams are defined in the Sensitive Areas Ordinance (SAO) as those areas of King County where surface waters produce a defined channel or bed. A defined channel or bed is an area that demonstrates clear evidence of the passage of water and includes but is not limited to bedrock channels, gravel beds, sand and silt beds and defined-channel swales. The channel or bed need not contain water year-round. This definition is not meant to include irrigation ditches, canals, storm or surface water runoff devices or other entirely artificial watercourses unless they are used by salmonids or used to convey streams naturally occurring prior to construction in such watercourse.如需了解此图层的更多信息，请参阅地理信息系统（Geographic Information System，GIS）数据目录。根据金县（King County）《敏感区域条例》（Sensitive Areas Ordinance，SAO），溪流指该县境内地表水能够形成明确河道或河床的区域。明确河道或河床指具有明显过水痕迹的区域，包括但不限于基岩河道、砾石河床、砂质与粉砂质河床以及明渠型洼地。此类河道或河床无需全年蓄水。本定义不涵盖灌溉沟渠、运河、雨水或地表径流排放设施及其他完全人工水道，除非此类水道被鲑科鱼类使用，或用于输送在该水道修建前即自然存在的溪流。