Fisheries River Classification Catchments - Institute for Fisheries Research (IFR)

This dataset identifies catchment areas based upon the concept of a natural ecological unit, as defined by the spatial scales of riverine physical and biological processes. Catchments are fairly large units that are characterized by relatively homogenous hydrologic, limnologic, channel morphology, and riparian dynamics. Catchment size, hydrology, water chemistry, water temperature, valley character, channel character, and fish assemblages were the attributes used to interpret and describe the ecological character of river valley segments. A GIS was utilized to interpret the information from the catchment and valley characteristics and categorizations were developed for each component attribute and assigned category values for each segment. Results were stored in ArcView 3.0 format. This dataset on valley segment classifications provides an initial description of the river resources in the Lower and Upper Peninsula of Michigan. This dataset and its development are an iterative process in which validation of attribute codings and the addition of new attributes will continue.本数据集以自然生态单元的概念为基础划定汇水区（catchment area），该单元的界定依据为河流物理与生物过程的空间尺度。汇水区属于规模较大的单元，其核心特征为相对均一的水文、湖沼学、河道地貌及河岸动态属性。汇水区规模、水文状况、水化学特征、水温、河谷特征、河道特征以及鱼类群落，均为用于阐释与描述河谷段生态特征的属性指标。本研究借助地理信息系统（Geographic Information System，GIS）解析汇水区与河谷特征相关的信息，为各组分属性构建分类体系，并为每个河谷段分配类别赋值。结果以ArcView 3.0格式存储。本河谷段分类数据集首次完成了密歇根州下半岛与上半岛的河流资源初步描述。本数据集及其构建过程属于迭代式工作，后续将持续开展属性编码验证与新属性补充工作。