The Camas National Wildlife Refuge (Refuge) in eastern Idaho, established in 1937, contains wetlands, ponds, and wet meadows that are essential resting and feeding habitat for migratory birds and nesting habitat for waterfowl. Initially, natural sources of water supported these habitats. However, during the past few decades, climate change and changes in surrounding land use have altered and reduced natural groundwater and surface water inflows such that the wetlands, ponds, and wet meadows are now maintained through water management and groundwater pumping. These water management activities have proven to be inefficient and costly, prompting the Refuge to develop alternative water management options that are more efficient and less expensive. The U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service, is studying the hydrogeology at the Refuge to provide information for developing alternative water management options.
The hydrogeologic studies at the Refuge included characterizing the type, distribution, and hydraulic conductivity of surficial sediments and measuring water levels and temperatures in monitoring wells. Four monitoring wells and seven soil probe coreholes were drilled at the Refuge. Seven water level and temperature data loggers were installed in the wells and water levels and temperatures were continuously recorded from November 2014 to June 2016. Sediment cores were collected from the coreholes and sediment type and distribution were characterized from drillers’ notes, geophysical logs, corehole samples, and particle grain-size analysis. The hydraulic conductivities of sediments were estimated using the measured average grain size and the assumed textural maturity of the sediment, and ranged from about 20 to 290 feet per day.
Twining, B.V., and Rattray, G.W., 2016, Characterization of sediment and measurement of groundwater levels and temperatures, Camas National Wildlife Refuge, eastern Idaho: U.S. Geological Survey Data Series 1024, 23 p., http://dx.doi.org/10.3133/ds1024.
ISSN: 2327-638X (online)
Table of Contents
- Characterization of Sediment
- Groundwater Levels and Temperatures
- References Cited
- Appendix A. Results of Particle-Grain Size Analyses on 49 Sediment Samples That Were Separated from the Seven Soil Probe Sediment Cores
Additional publication details
|Publication Subtype||USGS Numbered Series|
|Title||Characterization of sediment and measurement of groundwater levels and temperatures, Camas National Wildlife Refuge, eastern Idaho|
|Series title||Data Series|
|Publisher||U.S. Geological Survey|
|Publisher location||Reston, VA|
|Contributing office(s)||Idaho Water Science Center|
|Description||Report: v, 23 p.; Appendix|
|Other Geospatial||Camas National Wildlife Refuge|
|Online Only (Y/N)||Y|
|Additional Online Files (Y/N)||Y|