Bathymetric data for the Upper Mississippi and Illinois Rivers -- La Grange Pool

Water depth is an important feature of aquatic systems. On the Upper Mississippi River System (UMRS), water depth data are important for describing the physical template of the system and monitoring changes in the template caused by sedimentation. Although limited point or transect sampling of water depth can provide valuable information on habitat character in the UMRS as a whole, the generation of bathymetric surfaces are critical for conducting spatial inventories of the aquatic habitat. The maps are also useful for detecting bed elevation changes in a spatial manner as opposed to the more common method of measuring changes along transects. The Upper Midwest Environmental Sciences Center (UMESC) has been collecting bathymetric data within the UMRS since 1989 in conjunction with the Long Term Resource Monitoring Program (LTRMP).

水深是水生生态系统的重要特征。在上密西西比河系统（Upper Mississippi River System, UMRS）中，水深数据对于刻画该系统的物理生境模板，以及监测由沉积作用导致的模板变化均具有关键价值。尽管针对UMRS整体开展的有限水深点位或断面采样，可为其生境特征提供宝贵参考，但生成水下地形面对于开展水生栖息地的空间清查而言至关重要。相较于沿断面监测变化的常规手段，此类地形地图还可用于实现空间尺度上的河床高程变化检测。自1989年起，上中西部环境科学中心（Upper Midwest Environmental Sciences Center, UMESC）便联合长期资源监测计划（Long Term Resource Monitoring Program, LTRMP），在UMRS范围内持续收集水下地形数据。