LTRM Water Quality 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计划LTRM模块下6处研究河段的采样分层划定方案。针对鱼类、植被、水质三类监测组分的差异化采样需求，分别为每一类组分编制了独立的分层覆盖数据集。常规采样分层类型包含主河道、支汊道、回水区与蓄水区域。鱼类监测组分还进一步将分层划定出"岸线"子区域，专供仅沿岸线布设的采样设备使用。本数据集原始格式为栅格，每个像素的中心点即为对应采样点位。栅格单元尺寸通常为50米，不过部分水质分层的单元尺寸为200米。