![]() ![]() A key element is, that all four components use a common geometric data representation and common geometric and hydraulic computation routines. Transport computations and (4) water quality analysis. The HEC-RAS system contains several river analysis components for: (1) steady flow water surface profile computations (2) one- and two-dimensional unsteady flow simulation (3) movable boundary sediment Inundation mapping and animations of water propagation.Tabulation and Graphical Displays of Input and Output Data.The interface provides for the following functions: The main focus in the design of the interface was to make it easy to use the software, while still maintaining a high level of efficiencyįor the user. The user interacts with HEC-RAS through a graphical user interface (GUI). The following is a description of the major capabilities of HEC-RAS. The calibrated, verified, and validated LOEM model serves as a useful tool to support lake management.HEC-RAS is designed to perform one and two-dimensional hydraulic calculations for a full network of natural and constructed channels. SAV can have positive impact on the lake water quality by reducing algae concentration. Lower water elevation generally leads to larger SAV area. The model results are consistent with observed data indicating that algal growth in the lake is primarily nitrogen limited in the summer and nitrogen and light co-limited in the winter. The LOEM is applied to study water quality and SAV processes in the lake. ![]() The SAV model is capable of representing the spatial and temporal variations of SAV variations in the lake well. The SAV model is calibrated using measured SAV data in the lake. The model is capable of reproducing key water quality characteristics of the lake without having to resort to extensive, site-specific parameter manipulations. The water quality results are consistent with observed data from 25 locations in the lake. The LOEM is calibrated, verified, and validated to 3 years of water quality and SAV data. Lake Okeechobee is the largest subtropical lake in North America (1,730 km 2), it is very shallow (mean depth 2.7 m), and it includes a littoral habitat that makes up 20% of its area. The LOEM is developed under the framework of the EFDC model ( Hamrick 1992). This study presents the Lake Okeechobee Environment Model (LOEM), a three-dimensional (3D) hydrodynamic, sediment, water quality, and submerged aquatic vegetation (SAV) model of Lake Okeechobee, Florida. ![]()
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