Implementation of a one-dimensional hydrodynamic model for the Middle Paraguay River Basin

HEC-RAS;Hydraulic model, Hydrodynamic model, Hydrologic frequency analysis;one-dimensional;Paraguay River;topo-bathymetry;waterway

Takahashi, Roberto Hiroshi ; Garcia ; Marcelo H.

关键词: HEC-RAS;    Hydraulic model, Hydrodynamic model, Hydrologic frequency analysis;    one-dimensional;    Paraguay River;    topo-bathymetry;    waterway;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/92981/TAKAHASHI-THESIS-2016.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

A steady 1D hydraulic model (HEC-RAS) was implemented for the Middle Paraguay River Basin (MPRB), which comprises a reach between Porto Murtinho, Brazil, and Asunción, Paraguay. In order to prepare the model, first the topo-bathymetry was prepared by digitizing more than 10,000 depth points from available nautical charts and scaling them to a consistent geographic reference system. The main features such as the cross sections, river reach length, flow path and ineffective flow areas were created with the aid of HEC-GeoRAS and imported to HEC-RAS to create the geometry file. A hydrological statistical analysis was conducted to prepare the input design flows from data that corresponds to Porto Murtinho and Asunción fluvial stations. Finally, the finished model comprises a river reach of approximately 635 kilometers, more than 200 cross sections with 3,100 meters of spacing, and calibrated Manning's n value of 0.0245 for the main channel and a value of 0.04 for the floodplain. The simulation results, such as the water surface profiles, were processed by HEC-GeoRAS in ArcGIS to prepare floodplain maps for the entire reach.