Jonathan Traum
Science and Products
A hybrid machine learning model to predict and visualize nitrate concentration throughout the Central Valley aquifer, California, USA
Intense demand for water in the Central Valley of California and related increases in groundwater nitrate concentration threaten the sustainability of the groundwater resource. To assess contamination risk in the region, we developed a hybrid, non-linear, machine learning model within a statistical learning framework to predict nitrate...
Ransom, Katherine M.; Nolan, Bernard T.; Traum, Jonathan A.; Faunt, Claudia C.; Bell, Andrew M.; Gronberg, Jo Ann M.; Wheeler, David C.; Zamora, Celia; Jurgens, Bryant C.; Schwarz, Gregory E.; Belitz, Kenneth; Eberts, Sandra M.; Kourakos, George; Harter, Thomas Water availability and land subsidence in the Central Valley, California, USA
The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This agriculture relies heavily on surface-water diversions and groundwater pumpage to meet irrigation water demand. Because the valley is semi-arid and surface-water availability varies substantially,...
Faunt, Claudia C.; Sneed, Michelle; Traum, Jonathan A.; Brandt, Justin T. Examples of deformation-dependent flow simulations of conjunctive use with MF-OWHM
The dependency of surface- and groundwater flows and aquifer hydraulic properties on deformation induced by changes in aquifer head is not accounted for in the standard version of MODFLOW. A new USGS integrated hydrologic model, MODFLOW-OWHM, incorporates this dependency by linking subsidence and mesh deformation with changes in aquifer...
Hanson, Randall T.; Traum, Jonathan A.; Boyce, Scott E.; Schmid, Wolfgang; Hughes, Joseph D. Water availability and subsidence in California's Central Valley
The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This agriculture relies heavily on surface-water diversions and groundwater pumpage to meet irrigation water demand. Because the valley is semi-arid and...
Faunt, Claudia C.; Sneed, Michelle; Traum, Jonathan A.; Brandt, Justin T.
Hydrologic model of the Modesto Region, California, 1960-2004
Strategies for managing water supplies and groundwater quality in the Modesto region of the eastern San Joaquin Valley, California, are being formulated and evaluated by the Stanislaus and Tuolumne Rivers Groundwater Basin Association. Management issues and goals in the basin include an area in the lower part of the basin that requires drainage of...
Phillips, Steven P.; Rewis, Diane L.; Traum, Jonathan A.
Documentation of a groundwater flow model (SJRRPGW) for the San Joaquin River Restoration Program study area, California
To better understand the potential effects of restoration flows on existing drainage problems, anticipated as a result of the San Joaquin River Restoration Program (SJRRP), the U.S. Geological Survey (USGS), in cooperation with the U.S. Bureau of Reclamation (Reclamation), developed a groundwater flow model (SJRRPGW) of the SJRRP study area that...
Traum, Jonathan A.; Phillips, Steven P.; Bennett V, George L.; Zamora, Celia; Metzger, Loren F.