Abstract
A high-density pilot network of 10 rain gauges was implemented in the Everglades Nutrient Removal (ENR) Project to quantify areal rainfall over the site for accurate computation of water budget. The ENR Project, located in south Florida, is a 1500 ha wetland that was constructed to reduce phosphorus loads in agricultural runoff from the Everglades Agricultural Area (EAA) that enters the Water Conservation Areas (WCAs). The first 158 days of wet season daily rainfall data were used to evaluate the adequacy (or redundancy) of the network. A spatial correlation function was developed to characterize the spatial variation of wet season rainfall over the site. An exponential spatial correlation model was fitted to the data with an R2 value of 0.74. A method that compares relative error to rain gauge density was applied to determine the required minimum gauge density. It was determined that a five rain gauge network with uniform distribution was the most efficient design.
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