Laserfiche WebLink
2 <br /> Task 3.4 2-D Model Development and Calibration <br /> WEST will develop a 2-D depth-averaged hydrodynamic and sediment transport model <br /> to simulate sediment transport and deposition near Outfall 025. The extent of the 2-D <br /> model domain will be determined in such a way that the 1-D HEC-RAS model provides <br /> appropriate boundary conditions at the upstream and downstream ends of the 2-D model <br /> domain. <br /> We will use CCHE2D to perform the sediment transport modeling. CCHE2D is a <br /> general model for 2-D simulation and analysis of river flows,non-uniform sediment. <br /> transport, and morphologic processes. It is developed at the National Center for <br /> Computational Hydroscience and Engineering of the University of Mississippi. <br /> CCHE2D is a public domain software and has been used extensively in the nation. <br /> The 2-D CCHE2D model will be calibrated using available existing data and/or newly <br /> collected data identified in Task 1. <br /> Task 3.5 Sediment Transport Simulation <br /> WEST will run the combination of the 1-D HEC-RAS and 2-D CCHE2D models for the <br /> two alternatives for a range of hydrologic conditions identified in this task. <br /> Task 3.6 Model Results Analysis <br /> We will use the sediment transport modeling results to determine sedimentation patterns <br /> and magnitude for the range of hydrologic conditions. From these results,WEST will <br /> determine frequency and volume of required maintenance dredging near Outfall 025 for <br /> the range of flow conditions. WEST will also summarize the pros and cons of the two <br /> alternatives. <br /> Task 3.7 Documentation <br /> We will prepare a draft report to document model development and calibration and <br /> present sediment transport results. <br /> Deliverables <br /> WEST will deliver the following study product: <br /> • Field data sampling plan <br /> • Technical Memo to present development and calibration of the 2-D model <br /> • Draft Report of hydrodynamic and sediment transport modeling <br /> • Final Report of hydrodynamic and sediment transport modeling <br /> Cost Estimate <br /> The total cost to complete these services is expected not to exceed$46,826. An itemized <br /> cost estimate is included below. Work will be billed on a time and materials basis and <br /> will not exceed this amount without written permission. Any additional services <br /> requested outside the scope will have to be negotiated separately. <br /> WEST scope and costs for Outfall 025 Hydrodynamic and Sediment Transport Modeling 5 <br /> 10/15/2013 <br /> 36 <br />