Coho Intrinsic Potential

For more information about this layer please see the GIS Data Catalog. Information on estimating the quality and extent of historical habitat is needed for ongoing efforts to conserve and eventually recover protected populations of Pacific salmonids. Because georeferenced spatial data on habitat and fish distribution at the regional scale are lacking, we requested that NOAA implement a GIS approach in modeling the intrinsic potential (IP) of stream reaches to support juvenile coho salmon. The IP model uses geomorphic and hydrological attributes to estimate the latent potential of stream reaches to provide favorable habitat characteristics for spawning and rearing. Indices for the model are derived from a DEM and precipitation data. Thus, the model predicts patterns of relative productive potential expected in the absence of human disturbances, as related through the input data. The stream lines used as the basis for the IP geometry are based on King County's watercourse dataset, which has omission and spatial accuracy issues.如需获取该图层的更多详细信息，请参阅地理信息系统（GIS）数据目录。当前在开展太平洋鲑类（Pacific salmonids）受保护种群的保护及最终恢复工作时，亟需掌握用于估算历史栖息地质量与分布范围的相关数据。鉴于缺乏区域尺度下栖息地与鱼类分布的地理参考空间数据，我们请求美国国家海洋和大气管理局（NOAA）采用地理信息系统（GIS）方法，对河段的内在潜力（IP）开展建模工作，以支撑幼龄银鲑的栖息需求。该内在潜力模型借助地貌与水文属性，估算河段为鱼类产卵及育幼提供适宜栖息地特征的潜在能力。模型所需的指标源自数字高程模型（DEM）与降水数据。因此，该模型可基于输入的基础数据，预测在无人类干扰条件下的相对生产潜力空间分布模式。用于构建该内在潜力模型几何基底的河道矢量数据，源自金县（King County）的河道数据集，该数据集存在信息遗漏与空间精度不足的问题。