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Hydrological and Water Quality Monitoring Network in a watershed adjacent to the Everglades National Park

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  032048,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13763) @2003
Authors:   R. Munoz-Carpena, Dispenza and M. Morawietz
Keywords:   Watershed, hydrology, field methods, database, modeling, groundwater, Everglades, canal, seepage, intrumentation

The extensive boundary of Miami-Dade County (FL) with the Everglades National Park (ENP) is subject to the most expensive restoration project in history, the Comprehensive Everglades Restoration Project (CERP). The Frog Pond area is an agricultural watershed of 23 km2 adjacent to ENP. A network of 16 wells with automatic logging of groundwater heads, 4 canal/ditch stage recorders surrounding the area, 2 raingauges, ET estimation by an on-site automatic weather station, and a bi-weekly water quality sampling program was established in the area in March02. A GIS system was implemented in the area to support this research with different hydrological, land use and vegetation layers. The resulting hydrological and water quality information has been standardized and can now be accessed remotely from a custom-designed SQL database web server (UF-HydroBase). An MS-Windows client has been developed to maintain and update the on-line database remotely on a bi-weekly basis. UF-HydroBase contains powerful reporting and plotting capabilities to allow for analysis and sharing of data among researchers, managers, and to support on-going modeling efforts. The experimental results show that in a managed hydrological area like the Frog Pond, the regional water management system (canal stages) is the main factor explaining the mean seasonal groundwater profiles, rather than precipitation. However, precipitation is important to explain instantaneous or localized groundwater responses that in some cases can be directly associated with the risk of flooding. A flow perturbation created by a closed canal gate reached around 1.6-3.2 km (1-2 mi) around the structure. The aquifers specific yield (Sy) was estimated by a simplified method using the high-resolution (15 min readings) water level data leading to very consistent results for the five inner wells (3 7) of the well transect, with a value of Sy = 0.115

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