Primary Production and Light Availability in Lake Onalaska: Results of a PilotStudy to Evaluate Continuous Water Quality Monitors for Use in Upper Mississippi River Backwaters. Long Term Resource Monitoring Program

摘要

To evaluate the performance of a continuous monitoring device (Waterlogger)developed at Iowa State University, a pilot study was conducted on Lake Onalaska, Wisconsin (Navigational Pool 7 of the Upper Mississippi River), between June 28 and October 4, 1990. The devices rcorded subsurface (20 cm) temperature and dissolved oxygen and surface and subsurface (50 cm) light (photon flux of photosynthetically active radiation) every six minutes at eight sites. The Waterlogger device stores its measurements electronically on battery-powered memory (RAM) within the unit and can transmit the recorded data directly to a personal computer. The authors recommend that a network of Waterloggers be established on the Upper Mississippi River and that this network should initially include the six trend-analysis pools currently being monitored by the Long Term Resource Monitoring Program.