USGS Groundwater Information
New & NoteworthyModelMuse: Graphical User Interface for MODFLOW-2005 and PHAST (TM 6-A29) Groundwater: Ground water versus groundwater (OGW Technical Memo 2009.03) Field Techniques for Estimating Water Fluxes Between Surface Water and Ground Water (TM 4–D2) Ground-Water Availability in the United States (Circular 1323) USGS in Your StateUSGS Water Science Centers are located in each state. |
PULSE: Model-Estimated Ground-Water Recharge and Hydrograph of Ground-Water Discharge to a StreamThis web site includes information about the PULSE computer program for analyzing a streamflow record. The version at this site will read streamflow data in the format that is available from USGS web sites. OverviewThe computer model PULSE can be used to construct a hydrograph of groundwater discharge to a stream. The model is applicable to a ground-water flow system that is driven by areally uniform recharge to the water table, and in which groundwater discharges to a gaining stream. One of the two formulations used by the model allows for an instantaneous recharge pulse and subsequent groundwater discharge to the stream. The other formulation, which allows for a gradual hydrologic gain or loss term in addition to the instantaneous pulse, can be used to simulate the effects of gradual recharge to the water table, groundwater evapotranspiration, or downward leakage to a deeper aquifer.
Program users should be aware of recent data issues (12kb PDF). Background LiteratureThere are two publications which will provide valuable information to the hydrologist who is using the PULSE program. The first documents the theoretical basis and mathematical model. The program user should read this report. The second report provides additional information that may be useful to some program users. This report shows a particular application of the program (a forward model) for evaluating an inverse model. The second report includes useful information about applicability of the method and the recession index.
Useful Resources
Point of ContactComments about this page can be sent to Paul Barlow. |