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Kansas Water Science Center

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Watershed Processes and Modeling

This project conducts research in watershed processes and modeling. Work is done in cooperation with USGS projects and personnel located in Throughout the United States.

All references are listed in the publications by number.

Some ongoing and recently completed areas of research are:

Technical TOPMODEL Issues

  • Effects of DEM resolution on TOPMODEL parameters(see references 26, 41)
  • Effects of ln(a/tan(B)) computation algorithm on TOPMODEL parameters and calibration (see reference 29)

TOPMODEL Applications

  • Effects of subbasin size on simulated flow paths and stream chemistry (see references 27, 28, 35, 36)
  • Effects of climate change on streamflow (see reference 15)
  • Effects of topographic characteristics on stream chemistry (see references 6, 12, 19, 28, 35, 42, 44)

General description of TOPMODEL (see reference 22)

Effects of DEM Resolution on Landscape Characteristics

  • Effects of map scale and data resolution on topographic characteristics and TOPMODEL simulations (see reference 26)
  • Effects of computational algorithm and data resolution on topographic characteristics and TOPMODEL simulations(see reference 29)
  • Comparison of 100- and 1,000-m DEMs--effects of terrian discretization and terrain smoothing on landscape characteristics (see reference 41)

STATGO Soil Characteristics for the Conterminous US

  • Soil characteristics for the conterminous United States were derived from the USDA's STATGO database (see reference 35). The soil characteristics include available water capacity, permeability, bulk density, percent organic mater, slope, depth to bedrock, soil erodibility factor, soil loss tolerance factor, and wind erosion group. The data is available from: water.usgs.gov
  • Additional soil characteristics will be added to the online database. These will include soil taxonomy classifications and soil texture percentages (sand, silt, and clay).
  • The map below shows available water capacity of the soil. Lighter shades of gray indicate higher available water capacity.

Relations Between Terrain Characteristics and Stream Chemistry

  • Relation to lake alkalinity (see references 5, 6)
  • Relation to low-flow stream chemistry (see references 35, 36)
  • Relation to high-flow stream chemistry (see references 12, 42)

Effects of Climate Change on Water Resources

Technical Issues

  • Using weather-type analysis to assess the impacts of climate change (see references 13, 16)
  • Climate-change scenario development (see reference 18)
  • Detectability of climate change (see references 14, 15, 17, 43, 45)
  • Spatial scale issues (see references 31, 32)

Model Applications Evaluating the Impacts of Climate Change

  • Thornthwaite moisture index (see reference 11, 17)
  • TOPMODEL (see reference 15)
  • Water-balance models (see references 24, 30)

Links of interest:

List of publications

For further information or copies of the publications, please contact:

David Wolock
U.S. Geological Survey
4821 Quail Crest Place
Lawrence, KS 66049-3839

Telephone: 785-832-3528
FAX: 785-832-3500
EMAIL: dwolock@usgs.gov

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