WATER RESOURCES RESEARCH GRANT PROPOSAL
Project ID: 2004NE73B
Title: Investigation of Groundwater Interactions with Surface Hydrologic Systems in River Valleys -- Using Modeling and Field Approaches
Project Type: Research
Focus Categories: Groundwater, Surface Water, Methods
Keywords: Stream-aquifer Interactions, Groundwater Evapotranspiration, Streambed Conductance
Start Date: 03/01/2004
End Date: 02/28/2005
Federal Funds: $9,976
Non-Federal Matching Funds: $38,003
Congressional District: First District
University of Nebraska-Lincoln
Groundwater is intimately connected to the surface water systems in the river valleys of Nebraska. This study is needed to provide an integrated measure of groundwater and surface water systems and integrated models of the system.
Groundwater wells will be installed in the Platte River valley, Nebraska, where the depth to the water level is relatively shallow. These wells will be constructed in the areas near the U. S. Geological Survey’s stream gauging stations and in the areas where the weather stations of the High Plains Regional Climate Center, headquartered at the University of Nebraska-Lincoln, already exist. The stream gauging stations collect streamflow and stream stage data. These real-time data are available from the USGS web site. The High Plains Regional Climate Center collects hourly data on air temperature, relative humidity, solar radiation, wind speed, wind direction, precipitation, rainfall, and soil temperature. The observation wells will collect hourly groundwater levels that may reflect the responses of groundwater to the changes in stream stage, precipitation, and evapotranspiration. The integrated observation of groundwater, stream and atmospheric conditions provides basic data for the analysis of the interactions between groundwater and surface water systems.
Development of a cross-sectional numerical model is another task of this research. This model will include a groundwater flow model, a model for simulation of soil moisture movement in the vadose zone, and a crop model. This integrated model will simulate the interactions of groundwater with surface water systems. An inverse method will also be developed to determine the rate of groundwater evapotranspiration, as well as the streambed conductance of the Platte River, using the observed groundwater, stream and atmospheric data.