USGS ScienceSearch

Geology topics

James M. Gamble

Publications and source records attributed to James M. Gamble.

2 recordsLinked to original sources

Synthesis

The goal of this report is to examine changes in the current environment and living conditions of the coastal and tundra communities of northwestern Canada, northern Alaska, and the northern Far East of Russia – the Bering-Chukchi-Beaufort (BCB) region – and to understand how people are coping and adapting to these changes. The report seeks to describe how life in this region is changing in the context of the recent past; to project the likely future changes in the environmental, economic, and social systems; and to provide information for northern residents in preparing for and adapting to an uncertain future.

Book chapter

Hydrogeologic data from a shallow flooding demonstration project, Twitchell Island, California, 1997-2001

Data were collected during a study to determine the effects of continuous shallow flooding on ground-water discharge to an agricultural drainage ditch on Twitchell Island, California. The conceptual model of the hydrogeologic setting was detailed with soil coring and borehole-geophysical logs. Twenty-two monitoring wells were installed to observe hydraulic head. Ten aquifer slug tests were done in peat and mineral sediments. Ground-water and surface-water temperature was monitored at 14 locations. Flow to and from the pond was monitored through direct measurement of flows and through the calculation of a water budget. These data were gathered to support the development of a two-dimensional ground-water flow model. The model will be used to estimate subsurface discharge to the drainage ditch as a result of the pond. The estimated discharge will be used to estimate the concentrations of DOC that can be expected in the ditch.

Open-File Report