RELEASE-2023

A dual beam echosounder with side scan sonar and WAAS GPS are used to collect bathymetric (depth) and backscatter (signal strength) data. These data are collected using a boat-mounted system applied during surveys of NEON lakes and river sites. Bathymetric surveys are completed every 5 years; if an extreme event results in substantial changes to the physical environment then an out-of-cycle survey may be conducted. Depth data are used to produce bathymetric maps and side scan sonar data are used to classify subaquatic features to produce a habitat map. Instrumentation: Humminbird 1198c Si Combo