slide1 l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Flooding in Flathead County and Kalispell, MT PowerPoint Presentation
Download Presentation
Flooding in Flathead County and Kalispell, MT

Loading in 2 Seconds...

play fullscreen
1 / 17

Flooding in Flathead County and Kalispell, MT - PowerPoint PPT Presentation


  • 150 Views
  • Uploaded on

Flooding in Flathead County and Kalispell, MT. Initiation to Geo-HMS and HEC-HMS. Remi Candaele Hydrology - CE394K. Outline. Context & Flood Events Characteristics ArcGIS Process Geo-HMS Process HMS Model Future Work. Evergreen – Kalispell Suburb - 1995. Context.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Flooding in Flathead County and Kalispell, MT' - gaylord


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Flooding in Flathead County and Kalispell, MT

Initiation to Geo-HMS and HEC-HMS

Remi Candaele

Hydrology - CE394K

outline
Outline
  • Context & Flood Events Characteristics
  • ArcGIS Process
  • Geo-HMS Process
  • HMS Model
  • Future Work

Evergreen – Kalispell Suburb - 1995

context
Context
  • Flathead county subject to flooding
  • Located in northwest corner of Montana State.
  • Total area of 13,614 km² (5,256 mi²),
  • 410 km² (158 mi²) of it (3.01%) is water.
  • As of 2000, the population was 74,471.
motivations
Motivations
  • Being familiar with a Hydraulic Model !!!
flood events characteristics
Flood Events Characteristics

Peak Flow : 2 events at 35m3/s

Peak Flow : 2 events > 100m3/s

flood events characteristics6
Flood Events Characteristics

Flathead Valley

  • Occurring mostly during spring time,
  • Focus on 2 major events :
    • 04/13/1996
    • 04/20/1997
  • Low Rainfall intensity : computation over a long period,
  • Difficulty : 1 meteorological station and 2 gauge stations.

Time Series

catchments streams delineation
Catchments & Streams Delineation
  • Projected Coordinate System : NAD1983_StatePlane_Montana
  • 7 Subwatersheds selected

SubWatershed Characteristics

reclassification of land cover
Reclassification of Land Cover
  • Data downloaded from NLCD
  • Reclassification in 4 main categories thanks to Dr Venkatesh Merwade

Land Use Grid Obtained

soil data characterization of the soil type
Soil Data – Characterization of the Soil Type
  • SSURGO (scale 1:24,000) dataset doesn’t cover the entire watershed: use of the Statsgo dataset (1:250000).
  • 4 types of soil: A/B/C/D. Soil B assigned to the unknown soils
curve number grid
Curve Number & Grid
  • CN obtained from SCS TR55 (1986)
  • Generation of a CN Grid
  • Statistics
    • Mean : 66.26
    • Std Deviation : 11.06
geo hms arcgis interface to create input files to hms
Geo-HMS ArcGIS Interface to create input files to HMS
  • Processes
    • River Length
    • River Slope
    • Basin Slope
    • FlowPaths,
    • Basin Centroids
  • HMS Inputs/Parameters
    • Loss, Transform methods by SCS,
    • Route method by Muskingum
    • Time Lag
    • Basin Curve Numbers

Selection of the contributing catchments

-

GeoHMS Interface

geo hms arcgis interface to create input files to hms12
Geo-HMS ArcGIS Interface to create input files to HMS

Basin Lag in Hours

Basin Curve Numbers

running the model under hms
Running the model under HMS
  • Meteorologic model :
    • Weight gages,
    • Muskingum routing,
    • Time Lag,
    • Time Series.
results calibrating the model
Results – Calibrating the model
  • Computations for exercising.
  • Next steps :
    • Find accurate numbers for Muskingum routing,
    • Calibration factor : Streamflow = Model
acknowledgments
Acknowledgments
  • Venkatesh Merwade – Purdue U.
  • Christine Dartiguenave – ESRI
  • Ron Schlagenhaufer – Flathead County
  • Folks : Eusebio, Tyler, Brian & others