HR: 0800h
AN: H51D-1162    [Abstracts]
TI: Coupled Simulation of Wetland Hydrology, Nutrient and Vegetation Dynamics
AU: * Yang, L
EM: leiy@ufl.edu
AF: University of Florida Agricultural and Biological Engineering Department, PO Box 110570, Gainesville, FL 32611-0570 United States
AU: Campbell, K L
EM: klc@ufl.edu
AF: University of Florida Agricultural and Biological Engineering Department, PO Box 110570, Gainesville, FL 32611-0570 United States
AU: Graham, W D
EM: wgraham@ufl.edu
AF: University of Florida Agricultural and Biological Engineering Department, PO Box 110570, Gainesville, FL 32611-0570 United States
AU: Kiker, G A
EM: Gregory.A.Kiker@erdc.usace.army.mil
AF: U.S. Army Engineer Research & Development Center Environmental Laboratory, CEERD-EP-R, 3909 Halls Ferry Road, Vicksburg, MS 39180-6199 United States
AB: Ecohydrological variations such as altered hydrologic regime, invasion of exotic flora, and nutrient enrichment in the Kissimmee-Okeechobee-Everglades aquatic ecosystem in south Florida have been observed. It is important to study the dynamics of wetland hydrology, nutrient and vegetation communities and their interactions over multiple spatial and temporal scales so that wetland restoration, ecological protection, and best management policy decision-making can be effectively accomplished. Hydrologic models are important tools in these decision-making processes. Hydrological components capable of multi-directional overland flow and lateral groundwater flow simulation within the Java-based, object-oriented framework of the ACRU2000 model were developed to make the existing hydrologic model in ACRU2000 more applicable in the Lake Okeechobee Basin where flat topography, high-water-table and sandy soils define the very unique hydrology. In addition nutrient components capable of multi-directional transport and transformation of nitrogen and phosphorus were modified to make the current nutrient model in ACRU2000 more applicable in the Lake Okeechobee Basin. Observed data in the Lake Okeechobee Basin were used to validate the coupled hydrologic and nutrient cycling model's predictions of the spatial and temporal distribution of flow and nutrient concentrations. The simulated results indicate that the coupled model is capable of simulating nutrient, overland, and lateral groundwater flows over a watershed that incorporates wetlands. Future work will focus on the development of a new wetland vegetation model to be integrated into this coupled hydrological and nutrient model. The new model will then be applied in the Lake Okeechobee Basin to simulate the ecohydrological variations due to the implementation of alternative water and land management practices. (More information regarding ACRU2000 and its modification for use in the Southeastern Coastal Plain can be found at http://www.agen.ufl.edu/~klc/acru2k/.)
UR: http://www.agen.ufl.edu/~klc/acru2k/
DE: 1800 HYDROLOGY
DE: 1831 Groundwater quality
DE: 1871 Surface water quality
DE: 1890 Wetlands
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting