LTRM Fish Sampling Strata, UMRS La Grange Reach

The data set includes delineation of sampling strata for the six study reaches of the UMRR Program’s LTRM element. Separate strata coverages exist for each of the three monitoring components (fish, vegetation, and water quality) to meet the differing sampling needs among components. Generally, the sampling strata consist of main channel, side channel, backwater, and impounded areas. The fish component further delineates a “shoreline” portion of the strata to be used for sampling gears deployed only along the shoreline. The data are raster in origin, with the center of each pixel representing the sampling location. Cell size is typically 50 meters, although several water quality strata are at 200 meter cell size.

本数据集涵盖UMRR项目LTRM模块下设的6个研究河段的采样层划分工作。针对鱼类、植被与水质三类监测组分，均设有独立的采样层覆盖数据集，以适配各组分差异化的采样需求。通常而言，采样层包含主河道、支河道、回水区与蓄水区四类区域。其中鱼类监测组分还进一步将采样层划分为“岸线”子区域，专供仅沿岸线布设的采样设备开展采样作业。本数据集原始格式为栅格数据，每个像素的中心点即为对应的采样点位。栅格单元尺寸通常为50米，不过部分水质监测组分的采样层采用200米的单元尺寸。