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Open-File Report 2007–1440

Prepared in cooperation with the U.S. Agency for International Development, Office of Foreign Disaster Assistance (USAID/OFDA)

Users Manual for the Geospatial Stream Flow Model (GeoSFM)

By Guleid A. Artan1, Kwabena Asante1, Jodie Smith1, Shahriar Pervez1, Debbie Entenmann1, James P. Verdin2, and James Rowland1

1Science Applications International Corporation, Contractor to the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center, Sioux Falls, SD, work performed under USGS contract 03CRCN0001
2U.S. Geological Survey


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The monitoring of wide-area hydrologic events requires the manipulation of large amounts of geospatial and time series data into concise information products that characterize the location and magnitude of the event. To perform these manipulations, scientists at the U.S. Geological Survey Center for Earth Resources Observation and Science (EROS), with the cooperation of the U.S. Agency for International Development, Office of Foreign Disaster Assistance (USAID/OFDA), have implemented a hydrologic modeling system. The system includes a data assimilation component to generate data for a Geospatial Stream Flow Model (GeoSFM) that can be run operationally to identify and map wide-area streamflow anomalies. GeoSFM integrates a geographical information system (GIS) for geospatial preprocessing and postprocessing tasks and hydrologic modeling routines implemented as dynamically linked libraries (DLLs) for time series manipulations. Model results include maps that depicting the status of streamflow and soil water conditions. This Users Manual provides step-by-step instructions for running the model and for downloading and processing the input data required for initial model parameterization and daily operation.

Version 1.0

Posted September 2008

For additional information contact:
U.S. Geological Survey Earth Resources Observation and Science (EROS) Center
Sioux Falls, South Dakota
(605) 594-6151
World Wide Web:

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Suggested citation:

Artan, G.A., Asante, K., Smith, J., Pervez, S., Entenmann, D., Verdin, J., and Rowland, J., 2008, Users Manual for the Geospatial Stream Flow Model (GeoSFM): U.S. Geological Survey Open-File Report 2007–1440, 146 p.



Introduction to GeoSFM

Preprocessing Module

Model Installation

Terrain Analysis

Basin Characterization

Unit Hydrograph Response

Hydrologic Analysis Module

Preparing Input Time Series Files

Soil Moisture Accounting

Computing Streamflow

Parameter Calibration Module

Performing Sensitivity Analysis

Performing Model Calibration

Postprocessing Module

Updating Bankfull and Flow Statistics

Display Flow Percentile Map

Displaying Hydrographs

GeoSFM Utilities

Rain Data Tool for Downloading Data

Rain Data Tool for Image to Grid Conversion

Rain Data Tool for Projecting Grids

GIS Tool for Computing Grid Statistics

GIS Tool for Point Sampling of Grids

GIS Tool for Interpolating Point Data

DEM Tool for Sink Filling

Time Series Tool for Changing Temporal Resolution

Time Series Tool for Frequency Analysis


References Cited


Appendix 1: Processing Elevation Data

Appendix 2: Defining Analysis Extent

Appendix 3: Processing Land Cover Data

Appendix 4: Processing Soil Characteristics

Soil Depth


Hydraulic Conductivity

WHC – Soil Water Holding Capacity



Appendix 5: Creating Reservoir and Gauge Rating Files

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