Open-File Report 2007–1440
Abstract 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: Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge. |
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.
Abstract
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
Conclusions
References Cited
Glossary
Appendix 1: Processing Elevation Data
Appendix 2: Defining Analysis Extent
Appendix 3: Processing Land Cover Data
Appendix 4: Processing Soil Characteristics
Soil Depth
Texture
Hydraulic Conductivity
WHC – Soil Water Holding Capacity
Maxcover
RCN
Appendix 5: Creating Reservoir and Gauge Rating Files