Abstract
Floridas Lake Okeechobee is currently experiencing accelerated eutrophication due to excessive phosphorus (P) loadings from agricultural activities in its drainage basin. As a part of a P management program, the South Florida Water Management District has developed a computer modeling framework to simulate P transport processes in watersheds that drain into Lake Okeechobee. The overall framework consists of a land-based model (CREAMS-WT), a P transport model, and a set of computer programs that transform output from the land-based model into a form usable by the P transport model. The transport model is a modified version of the QUAL2E model that accounts for P assimilation in both stream channels and wetlands. Results from model simulations were compared with measured data at sites located in the Taylor Creek basin for the period of May 1981 through October 1985. Comparisons indicate that the model provides reasonable estimates of flow and P loadings on a seasonal basis. Phosphorus assimilation within the transport system also was analyzed using the transport model, and estimates of P assimilation compared favorably with values taken from previous studies.
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