1 / 19

South Platte CWMS Model Missouri Basin Forecasters Meeting January 29, 2014

South Platte CWMS Model Missouri Basin Forecasters Meeting January 29, 2014. Brian Twombly, Omaha District, Corps of Engineers. Corps Water Management System (CWMS). Developed by the Hydrologic Engineering Center (HEC). Software that Interfaces: Data Acquisition Data Storage

zephr-fry
Download Presentation

South Platte CWMS Model Missouri Basin Forecasters Meeting January 29, 2014

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. South Platte CWMS Model Missouri Basin Forecasters Meeting January 29, 2014 Brian Twombly, Omaha District, Corps of Engineers

  2. Corps Water Management System (CWMS) • Developed by the Hydrologic Engineering Center (HEC). Software that Interfaces: • Data Acquisition • Data Storage • HEC-HMS (rainfall/runoff) • HEC-ResSim (reservoir routing) • RiverWare (river system) • HEC-RAS (hydraulics) • HEC-FIA (economic consequences) • HEC-RTS is the personal computer version of CWMS that interfaces all the models without the database connections.

  3. HEC-HMS • Three models were developed: • Upper Basin Snow • Upper Basin Rain • Middle Basin Rain

  4. Upper South Platte • Two different basins: Rain and Snow • Gridded snow and air temp from CRREL and NOHRSC

  5. Mid South Platte - Requires an input at the Waterton gage either from the upper HMS or NWS forecast.

  6. HEC-ResSim • HMS inflows fed into ResSim • ResSim computes reservoir releases for: • Chatfield • Cherry Creek • Bear Creek

  7. HEC-RAS • Uses outflow from ResSim in reaches downstream of the reservoirs. • HMS provides flows to other reaches.

  8. Model Development - GeoRAS DEM: 2 meter LiDAR data for core Denver Metropolitan area, obtained in 2008. 10 meter DEM outside LiDAR extents, provided by the district. Centerline Development: Digitized from aerial imagery for South Platte River and the major contributing tributaries in the basin. Centerlines in Green. Cross Section Geometry : Cross sections in Red. Developed by RAS team. Storage Areas in Blue.

  9. HEC-FIA • Calculates flood damages and loss of life • Uses inundations calculated in HEC-RAS

  10. Data Needs • Forecasted Temperature Grids • CRREL to provide grids from NOHRSC • 3 days forecasted temperature • Any other sources of grids? • Historical gridded temperature and precipitation • Could be used to develop spaghetti plots and probabilistic forecasts.

  11. Data Needs • NWS Waterton Forecast • 6 hour time step • Could be used instead of running the upper HMS model. • How are the radar precipitation grids ground truthed?

  12. Questions Brian Twombly, P.E. brian.j.twombly@usace.army.mil (402)995-2316

  13. South Platte ResSim Simulations • Sept 2013 Flood Simulation • Transposed rainfall grid for 10-16 Sept 2013 • Created new rainfall grid over reservoir watersheds • Developed hydrographs using 75% HMS models • Create a Sept 2013 ResSim simulation using HMS results

  14. South Platte ResSim Sept 2013 Simulation • Transposed Rainfall Grid • HEC-MetVue, Gage Interp, ArcGis • Created a grid of circles with Excel and ArcGis • Transposed gridded rainfall with MetVue • Re-sampled gridded rainfall by average rainfall for each circle over the time period of the gridded rainfall dss file • Created a new gridded rainfall file with Gage Interp

  15. South Platte ResSim Sept 2013 Simulation

  16. Sept 2013 Simulation Cherry Creek Basin Storm Centering

  17. Sept 2013 Simulation Downstream Storm Centering

More Related