Stephen B Gingerich
Stephen Gingerich is a research hydrologist at the USGS Oregon Water Science Center.
Stephen Gingerich has been a Research Hydrologist for the U.S. Geological Survey since 1995. He has authored over 35 scientific papers on subjects such as groundwater modeling and island hydrology. He was a Fulbright Scholar working in Japan during 2008-09. He started working for the USGS in 1990 as a student. He has worked on hydrologic studies in Oregon, Hawaii, Guam, Japan, the Marshall Islands, American Samoa, the Northern Mariana Islands, and Diego Garcia.
Education and Certifications
BS in Geosciences from the Pennsylvania State University, 1986
MS in Hydrology from the University of Hawaii at Manoa, 1992
PhD in Hydrology from the University of Hawaii at Manoa, 1995
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Hydrologic Resources of Guam
Introduction
The U.S. Territory of Guam, which lies in the western Pacific Ocean near latitude 13?28'N and longitude 144?45'E, is the largest (211 mi2) and southernmost of the islands in the Mariana chain. Ground water supplies about 80 percent of the drinking water for the island's 150,000 residents and nearly one million visitors per year. In northern Guam, water is obtained from wells that t
Authors
Stephen B. Gingerich
Geohydrology and Numerical Simulation of Alternative Pumping Distributions and the Effects of Drought on the Ground-Water Flow System of Tinian, Commonwealth of the Northern Mariana Islands
Ground water in a freshwater lens is the main source of freshwater on Tinian, Commonwealth of the Northern Mariana Islands. Four major geologic units make up the island with high-permeability limestone units overlying low-permeability volcanic rocks. Estimates of limestone hydraulic conductivity range from 21 to 23,000 feet per day.
Estimates of water-budget components for Tinian are 82 inches
Authors
Stephen B. Gingerich
Drilling and construction data for the Waiohuli exploratory well (state well 6-4421-01), island of Maui, Hawaii
No abstract available.
Authors
Stephen B. Gingerich, David R. Sherrod
The influence of microclimates and fog on stable isotope signatures used in interpretation of regional hydrology: East Maui, Hawaii
Stable isotopes of precipitation, ground water and surface water measured on the windward side of East Maui from 0 to 3055 m altitude were used to determine recharge sources for stream flow and ground water. Correct interpretation of the hydrology using rainfall ??18O gradients with altitude required consideration of the influence of fog, as fog samples had isotopic signatures enriched by as much
Authors
M. A. Scholl, S. B. Gingerich, G.W. Tribble
Ground Water in Hawaii
Ground water is one of Hawaii's most important natural resources. It is used for drinking water, irrigation, and domestic, commercial, and industrial needs. Ground water provides about 99 percent of Hawaii's domestic water and about 50 percent of all freshwater used in the State. Total ground water pumped in Hawaii was about 500 million gallons per day during 1995, which is less than 3 percent of
Authors
Stephen B. Gingerich, Delwyn S. Oki
Ground-water resources of Tinian, Commonwealth of the Northern Mariana Islands
Tinian, which lies in the western Pacific Ocean at latitude 15°N and longitude 145°W (fig. 1), is the second largest island (39.2 mi2) in the Commonwealth of the Northern Mariana Islands (CNMI). Fresh ground water is obtained from shallow wells that tap the surface of a freshwater lends found in an aquifer composed mainly of coralline limestone. The main water-supply well withdraws water with a ch
Authors
Stephen B. Gingerich, Daniel S. Yeatts
Ground water and surface water in the Haiku area, East Maui, Hawaii
The Haiku study area lies on the gently sloping eastern flank of the East Maui Volcano (Haleakala) between the drainage basins of Maliko Gulch to the west and Kakipi Gulch to the east. The study area lies on the northwest rift zone of East Maui Volcano, a geologic feature 3 to 5 miles wide marked by surface expressions such as cinder, spatter, and pumice cones. The study area contains two geologic
Authors
Stephen B. Gingerich
Estimating transmissivity and storage properties from aquifer tests in the Southern Lihue Basin, Kauai, Hawaii
Three to four different analysis methods were applied to the drawdown or recovery data from five constant-rate aquifer tests of 2 to 7 days in length to estimate transmissivity of rocks in the southern Lihue basin, Kauai, Hawaii. The wells penetrate rocks of the Koloa Volcanics and the underlying Waimea Canyon Basalt. Because the wells are located far apart and in previously unexplored areas, it i
Authors
Stephen B. Gingerich
Ground-water occurrence and contribution to streamflow, northeast Maui, Hawaii
The study area lies on the northern flank of theEast Maui Volcano (Haleakala) and covers about129 square miles between the drainage basins ofMaliko Gulch to the west and Makapipi Stream tothe east. About 989 million gallons per day of rain-fall and 176 million gallons per day of fog dripreaches the study area and about 529million gal-lons per day enters the ground-water system asrecharge. Average
Authors
Stephen B. Gingerich
Ground-water resources of the coastal plain of Aunuu Island, American Samoa, 1996-97
No abstract available.
Authors
S. B. Gingerich, S. K. Izuka, T.K. Presley
Numerical modelling of vertically extensive groundwater bodies in Maui, Hawaii: An alternative to perched aquifers
Groundwater in East Maui, Hawaii is traditionally described as a series of discrete aquifers perched on low-permeability units underlain by a basal lens with heads of about 2-3 m. An alternative concept, a fully saturated aquifer to as much as 1400 m elevation, was investigated using a numerical model with various horizontal hydraulic conductivity values and anisotropy ratios. Results indicate tha
Authors
S. B. Gingerich
Estimation of the depth to the fresh-water/salt-water interface from vertical head gradients in wells in coastal and island aquifers
An accurate estimate of the depth to the theoretical interface between fresh, water and salt water is critical to estimates of well yields in coastal and island aquifers. The Ghyben–Herzberg relation, which is commonly used to estimate interface depth, can greatly underestimate or overestimate the fresh-water thickness, because it assumes no vertical head gradients and no vertical flow. Estimatio
Authors
S. K. Izuka, S. B. Gingerich
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Hydrologic Resources of Guam
Introduction The U.S. Territory of Guam, which lies in the western Pacific Ocean near latitude 13?28'N and longitude 144?45'E, is the largest (211 mi2) and southernmost of the islands in the Mariana chain. Ground water supplies about 80 percent of the drinking water for the island's 150,000 residents and nearly one million visitors per year. In northern Guam, water is obtained from wells that tAuthorsStephen B. GingerichGeohydrology and Numerical Simulation of Alternative Pumping Distributions and the Effects of Drought on the Ground-Water Flow System of Tinian, Commonwealth of the Northern Mariana Islands
Ground water in a freshwater lens is the main source of freshwater on Tinian, Commonwealth of the Northern Mariana Islands. Four major geologic units make up the island with high-permeability limestone units overlying low-permeability volcanic rocks. Estimates of limestone hydraulic conductivity range from 21 to 23,000 feet per day. Estimates of water-budget components for Tinian are 82 inchesAuthorsStephen B. GingerichDrilling and construction data for the Waiohuli exploratory well (state well 6-4421-01), island of Maui, Hawaii
No abstract available.AuthorsStephen B. Gingerich, David R. SherrodThe influence of microclimates and fog on stable isotope signatures used in interpretation of regional hydrology: East Maui, Hawaii
Stable isotopes of precipitation, ground water and surface water measured on the windward side of East Maui from 0 to 3055 m altitude were used to determine recharge sources for stream flow and ground water. Correct interpretation of the hydrology using rainfall ??18O gradients with altitude required consideration of the influence of fog, as fog samples had isotopic signatures enriched by as muchAuthorsM. A. Scholl, S. B. Gingerich, G.W. TribbleGround Water in Hawaii
Ground water is one of Hawaii's most important natural resources. It is used for drinking water, irrigation, and domestic, commercial, and industrial needs. Ground water provides about 99 percent of Hawaii's domestic water and about 50 percent of all freshwater used in the State. Total ground water pumped in Hawaii was about 500 million gallons per day during 1995, which is less than 3 percent ofAuthorsStephen B. Gingerich, Delwyn S. OkiGround-water resources of Tinian, Commonwealth of the Northern Mariana Islands
Tinian, which lies in the western Pacific Ocean at latitude 15°N and longitude 145°W (fig. 1), is the second largest island (39.2 mi2) in the Commonwealth of the Northern Mariana Islands (CNMI). Fresh ground water is obtained from shallow wells that tap the surface of a freshwater lends found in an aquifer composed mainly of coralline limestone. The main water-supply well withdraws water with a chAuthorsStephen B. Gingerich, Daniel S. YeattsGround water and surface water in the Haiku area, East Maui, Hawaii
The Haiku study area lies on the gently sloping eastern flank of the East Maui Volcano (Haleakala) between the drainage basins of Maliko Gulch to the west and Kakipi Gulch to the east. The study area lies on the northwest rift zone of East Maui Volcano, a geologic feature 3 to 5 miles wide marked by surface expressions such as cinder, spatter, and pumice cones. The study area contains two geologicAuthorsStephen B. GingerichEstimating transmissivity and storage properties from aquifer tests in the Southern Lihue Basin, Kauai, Hawaii
Three to four different analysis methods were applied to the drawdown or recovery data from five constant-rate aquifer tests of 2 to 7 days in length to estimate transmissivity of rocks in the southern Lihue basin, Kauai, Hawaii. The wells penetrate rocks of the Koloa Volcanics and the underlying Waimea Canyon Basalt. Because the wells are located far apart and in previously unexplored areas, it iAuthorsStephen B. GingerichGround-water occurrence and contribution to streamflow, northeast Maui, Hawaii
The study area lies on the northern flank of theEast Maui Volcano (Haleakala) and covers about129 square miles between the drainage basins ofMaliko Gulch to the west and Makapipi Stream tothe east. About 989 million gallons per day of rain-fall and 176 million gallons per day of fog dripreaches the study area and about 529million gal-lons per day enters the ground-water system asrecharge. AverageAuthorsStephen B. GingerichGround-water resources of the coastal plain of Aunuu Island, American Samoa, 1996-97
No abstract available.AuthorsS. B. Gingerich, S. K. Izuka, T.K. PresleyNumerical modelling of vertically extensive groundwater bodies in Maui, Hawaii: An alternative to perched aquifers
Groundwater in East Maui, Hawaii is traditionally described as a series of discrete aquifers perched on low-permeability units underlain by a basal lens with heads of about 2-3 m. An alternative concept, a fully saturated aquifer to as much as 1400 m elevation, was investigated using a numerical model with various horizontal hydraulic conductivity values and anisotropy ratios. Results indicate thaAuthorsS. B. GingerichEstimation of the depth to the fresh-water/salt-water interface from vertical head gradients in wells in coastal and island aquifers
An accurate estimate of the depth to the theoretical interface between fresh, water and salt water is critical to estimates of well yields in coastal and island aquifers. The Ghyben–Herzberg relation, which is commonly used to estimate interface depth, can greatly underestimate or overestimate the fresh-water thickness, because it assumes no vertical head gradients and no vertical flow. EstimatioAuthorsS. K. Izuka, S. B. Gingerich - News