+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Determining regional ground-water recharge in the Great Basin



Determining regional ground-water recharge in the Great Basin



Abstracts with Programs - Geological Society of America 34(4): 56



Ground-water recharge in arid basins of the Great Basin varies spatially and temporally. This variability is caused by the varying distribution of net infiltration in the shallow subsurface and the lateral and vertical redistribution of water within the unsaturated zone. The major components affecting net infiltration in order of importance are the quantity and duration of precipitation (rain and snow accumulation and melt); infiltration rate and water storage capacity of the shallow subsurface material; evapotranspiration; and the bulk permeability of the subsurface material below the root zone. The major components influencing the lateral and vertical redistribution of water in the unsaturated zone are the amount of net infiltration; the thickness of the unsaturated zone; and the effective flow path porosity, which is controlled by faults, fractures, and the hydrologic properties and layering of sediments and bedrock in the unsaturated zone. Although temporal fluctuations in net infiltration diminish with depth, resultant recharge is expected to fluctuate on timescales of days to centuries making decadal-scale climate cycles significant to understanding recharge. Simple water-balance calculations were used to analyze the spatial and temporal components that influence net infiltration, and subsequently ground-water recharge, in the Great Basin, and to evaluate the dominant components in each subbasin. The calculations are done on a monthly time step and account for rainfall, snow accumulation, snowmelt, soil water storage, potential evapotranspiration, runoff, and infiltration below the root zone. Calculations indicate that, in a typical basin, net infiltration occurs in less than 5 percent of the area and only when surface-water supply exceeds the storage capacity and potential evapotranspiration in the shallow subsurface over a fixed period of time. This method compares well with the recharge results determined by more physically detailed numerical models, and with other approaches used on the same subbasins. These calculations use 50 years of climate data that allows for the evaluation of decadal-scale climate cycles (El Nino/La Nina and the Pacific Decadal Oscillation) which will help determine the influence of future climate change on water availability for basin recharge.

Accession: 018716100

Download citation: RISBibTeXText


Related references

Shallow ground-water recharge, regional ground-water divides, and aquifer storage in the Great Lakes basin. Geological Society of America 40.5, 2008

Determination of ground-water recharge data at specific sites and their use in determining regional values. Memoires - Association Internationale des Hydrogeologues = Memoires - International Association of Hydrogeologists 15(1): 84-87, 1979

Regional ground-water evapotranspiration and ground-water budgets, Great Basin, Nevada. 2000

Mankind's use of ground water within the Great Lakes basin; why recharge, flow, discharge, and quality matter. Iaglr Conference Program and Abstracts. 43: A 104, 2000

Development of concepts of regional ground-water flow, Great Basin part of the Basin and Range Province, eastern Nevada and western Utah. Abstracts with Programs - Geological Society of America 29(6): 427, 1997

Hydrogeologic controls on regional ground-water movement in the southeastern Great Basin. Abstracts with Programs - Geological Society of America 14(4): 183, 1982

Michigan basin regional ground water flow discharge to three Great Lakes. Ground Water 40(4): 390-405, 2002

Depleting ground water resources with an alarming rate in the great Thar Desert of India and an urgent need to check the uncontrolled exploitation of the ground water and to go for the artificial; recharge in the region. Congres Geologique International, Resumes 33, 2008

Deuterium as a Tracer of Regional Ground-Water Flow, Southern Great Basin, Nevada and California. Geological Society of America Bulletin 83(12): 3691-3708, 1972

Deliniation of regional ground water flow systems using deuterium, eastern Great Basin, Nevada. Part 7: 239-240 1969, 1969

The effects of ground-water recharge on nitrate-N concentrations in a conduit-dominated carbonate aquifer; the Sinking Valley ground-water basin, south-central Kentucky. Abstracts with Programs Geological Society of America: , Pages 371. 1990., 1990

Geologic features that control regional ground-water movement in the eastern Great Basin, Nevada and Utah. Abstracts with Programs - Geological Society of America 17(7): 691, 1985

Simulation of regional ground-water flow in carbonate-rock aquifers of the Great Basin in Nevada, Utah, and adjacent states. Abstracts with Programs - Geological Society of America 17(7): 534, 1985

Hydrogeologic setting and ground-water flow simulations of the Great Miami River basin regional study area, Ohio. U S, 2007

Ground-water recharge and detergents; detection and localization of recharge to a ground-water aquifer from a river on the basis of mapping detergent content, and comparison with results obtained by hydraulic methods. Terres et Eaux 22(58): 19-28, 1969