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Integrated Synoptic Surveys of the Hydrodynamics and Water-Quality Distributions in Two Lake Michigan Rivermouth Mixing Zones using an Autonomous Underwater Vehicle and a Manned Boat
| 题名： | Integrated Synoptic Surveys of the Hydrodynamics and Water-Quality Distributions in Two Lake Michigan Rivermouth Mixing Zones using an Autonomous Underwater Vehicle and a Manned Boat |
| 作者： | Jackson, P. R.; Reneau, P. C. |
| 关键词： | Hydrodynamics##Water temperature##Water quality##Simulation##Lake Michigan##Dissolved oxygen##Nitrogen##Ammonia##Nitrates##Phosphorus##Organic matter##Algae##Calibration##Velocity##River basins##Mathematical models##Manned##Tethering##Table(Data)##Figures(Data)##Underwater vehicles## |
| 摘要： | The U.S. Geological Survey (USGS), in cooperation with the National Monitoring Network for U.S. Coastal Waters and Tributaries, launched a pilot project in 2010 to determine the value of integrated synoptic surveys of rivermouths using autonomous underwater vehicle technology in response to a call for rivermouth research, which includes study domains that envelop both the fluvial and lacustrine boundaries of the rivermouth mixing zone. The pilot project was implemented at two Lake Michigan rivermouths with largely different scales, hydrodynamics, and settings, but employing primarily the same survey techniques and methods. The Milwaukee River Estuary Area of Concern (AOC) survey included measurements in the lower 2 to 3 miles of the Milwaukee, Menomonee, and Kinnickinnic Rivers and inner and outer Milwaukee Harbor. This estuary is situated in downtown Milwaukee, Wisconsin, and is the most populated basin that flows directly into Lake Michigan. In contrast, the Manitowoc rivermouth has a relatively small harbor separating the rivermouth from Lake Michigan, and the Manitowoc River Watershed is primarily agricultural. Both the Milwaukee and Manitowoc rivermouths are unregulated and allow free exchange of water with Lake Michigan. This pilot study of the Milwaukee River Estuary and Manitowoc rivermouth using an autonomous underwater vehicle (AUV) paired with a manned survey boat resulted in high spatial and temporal resolution datasets of basic water- quality parameter distributions and hydrodynamics. The AUV performed well in these environments and was found primarily well-suited for harbor and nearshore surveys of three-dimensional water-quality distributions. Both case studies revealed that the use of a manned boat equipped with an acoustic Doppler current profiler (ADCP) and multiparameter sonde (and an optional flow-through water-quality sampling system) was the best option for riverine surveys. |
| 总页数： | 44 |
| 报告类型： | 科技报告 |
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