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AGWA Training

AGWA Training

Oct 30, 2015

Thursday 10/29 AGWA Workshop

Copied all of the AGWA tutorials to my GoogleDrive /AGWA (/Presentations, /Documents)

ArcGIS Refresher

The Land Cover Modification Tool in AGWA will be used to create a treated version of the National Land Cover Data 2001 (NLCD 2001) already modified to represent the effects of the fire. The post-fire NLCD 2001 dataset and the treated, post-fire NLCD 2001 dataset will be used to parameterize the KINematic Runoff and EROSion Model (KINEROS2; Semmens et al., 2008; www.tucson.ars.ag.gov/kineros).

Basic Data Requirements

•Digital Elevation Model (DEM – in ESRI Grid format)
  • USGS DEM
  • OpenTopography
  • Custom
•Soils (SSURGO or STATSGO)
•Land Use – Land Cover (National Land Cover Dataset – NLCD)
  • Alternate vegetation data need to be congruent to the NLCD.
•Location of Outlet (Pour point)
•Climatic Data
•Hydrologic Unit Maps (HUC)
•NRCS - http://www.nrcs.usda.gov/wps/portal/nrcs/main/national/water/watersheds

Steps to Create an AGWA Database

•Locate your watershed (Google)
•Gather Data
•DEM and NLCD
•nationalmap.gov
•Soils
•Web Soil Survey (websoilsurvey.sc.egov.usda.gov)
•Climate
•Varies sources – depends on which model you use
•NOAA National Centers for Environmental Information (www.ncdc.noaa.gov/)
•NOAA Atlas 14 – Design Storms (hdsc.nws.noaa.gov)
•Daymet - http://daymet.ornl.gov/ 
•NWS Precipitation Frequency Data Server: http://hdsc.nws.noaa.gov/hdsc/pfds/
Stochastic Weather Generator – In AGWA
•Doppler Weather Radar Maps. 

Steps to Create an AGWA Database

•Convert all the data to the same Coordinate System
•Same Reference Ellipsoid  (Datum)
•Same Projection
•Universal Transverse Mercator (UTM)
•UNITS must be in METERS
•Use the Project tool in ArcGIS – in Batch mode
•Different tool for Features and Rasters
•Clip Data to Watershed Area
•The Smaller the Data Extent the Faster the Processing Time
•Use other information to locate the watershed
•HUC watersheds
•Pour points
•In tutorial we will used a disturbance (fire) area
•Select the HUC Watershed(s) you are interested in
•If more then one HUC watershed Merge the watersheds together  
•Buffer the Merged HUC Watershed(s)
•1 km (1000 m) usually is enough
•Use the Buffered HUC Watershed(s) to Clip the data layers
•Different Clip tools for features and rasters
•Soil Data
•Two parts – Soil polygon Layer and the Soil Attributes Table
•Need to Join the Table to the Polygon Layer
•We do it after the Clip so only data for the soil types in the analysis area are  Imported.  
    

References

Anderson, H. W., M. D. Hoover, and K. G. Reinhart. 1976. "Forests and water: effects of forest management on floods, sedimentation, and water supply." General Technical Report PSW-18, USDA, Forest Service, Berkeley, CA.
Canfield, H.E., D.C. Goodrich, I.S. Burns, 2005. Selection of parameter values to model post-fire runoff and sediment transport at the watershed scale in southwestern forests. In: Proceedings, ASCE Watershed Management Conference, Williamsburg, VA, July 19-22, 2005.
DeBano, L. F., Neary, D.G. and Folliott, P.F., 1998. Fire’s Effects on Ecosystems. John Wiley and Sons, New York. 338p.
Goodrich, D.C., H.E. Canfield, I.S. Burns, D.J. Semmens, S.N. Miller, M. Hernandez, L.R. Levick, D.P. Guertin, and W.G. Kepner, 2005. Rapid post-fire hydrologic watershed asessment using the AGWA GIS-based hydrologic modeling tool. In: Proceedings, ASCE Watershed Management
Conference, Williamsburg, VA, July 19-22, 2005.
Robichaud. P.R. Beyers, J. L., Neary, D.G., 2000 Evaluating the Effectiveness of Postfire Rehabilitation Treatments. United States Forest Service Rocky Mountain Research Station General Technical Report RMRS-GTR-63
Semmens, D.J., Goodrich, D.C., Unkrich, C.L., Smith, R.E., Woolhiser, D.A., Miller, S.N., 2008. KINEROS2 and the AGWA Modeling Framework. Chapter 5: In Hydrological Modelling in Arid and Semi-Arid Areas, Cambridge University Press, London. pp 49-69.