Research Hydrologist
Email:
walvoord@usgs.gov
Office Phone:
303-236-4998
Fax:
303-236-5034
ORCID:
0000-0003-4269-8366
Location
Box 25046
Denver Federal Center
Denver
, CO
80225-0046
US
|
Groundwater withdrawals in the western US are a critical component of the water resources strategy for the region. Climate change already may be substantially altering recharge into groundwater systems; however, the quantity and direction (increase or decrease) of changes are relatively unknown as most climate change assessments have focused on surface water systems. We propose to conduct a broad scale literature review followed by a synthesis of available data, analysis and simulations with available downscaled climate scenarios to understand how recharge in the western US might respond to plausible climatic shifts during the rest of the 21st Century. We will produce an estimated range of impacts on groundwater...
Categories: Data,
Project;
Types: Downloadable,
GeoTIFF,
Map Service,
Raster;
Tags: All Working Groups,
Climate,
Completed,
Groundwater,
Land Resources, All tags...
Water Resources, Fewer tags
|
The West Fork of Dall Creek is located ~100km southwest of Coldfoot, AK along the Dalton Highway, south of the Brooks Range. Five ground penetrating radar (GPR) profiles were collected on 4/4/2019 at the West Fork of Dall Creek in interior Alaska. The West Fork of Dall Creek is composed of unburned black spruce forest with a burn scar from the 2004 Dall City Fire. All collected profiles, other than the Central Midpoint Survey (CMP), transect the burn scar between start and end locations in unburned black spruce forest. Data were collected with a Sensors and Software pulseEKKO pro unit and 100 mHz antennas. Four of the lines were conducted as common offset surveys with manual data collection that employed a consistent...
|
The West Fork of Dall Creek is located ~100km southwest of Coldfoot, AK along the Dalton Highway, south of the Brooks Range. The West Fork of Dall Creek is composed of unburned black spruce forest with a burn scar from the 2004 Dall City Fire. Multi-season, multi-method geophysical data were collected both within the burned and unburned areas. Geophysical techniques used include Nuculear Magnetic Resonance (NMR) and Ground Penetrating Radar (GPR) data. NMR data were collected with a down borehole Dart tool (Vista Clara Inc.). GPR data were collected with a Sensors and Software pulseEKKO pro unit and 100 mHz antennas and a high power (1000V) transmitter. Soil temperature data were collected from the unburned black...
|
The West Fork of Dall Creek is located ~100km southwest of Coldfoot, AK along the Dalton Highway, south of the Brooks Range. The West Fork of Dall Creek is composed of unburned black spruce forest with a burn scar from the 2004 Dall City Fire. HOBO Tidbit v2 temperature data loggers that recorded soil temperature were installed in the unburned black spruce forest adjacent to the burn scar on 5/10/2017 and removed on 6/26/2018. Data were collected from depths of 10, 30, 50, and 70 cm.
|
1) To better understand linkages between climate (and other perturbations such as land use change and fire) and variably saturated subsurface flow with focus on hydrologically extreme environments including arid to semiarid regions and subarctic to arctic permafrost systems, and 2) to simulate/predict hydrologic and related impacts resulting from system change by integrating cutting-edge data from remote sensing and geophysical methods into innovative numerical models.
|
View more...
|
