Chloride concentrations in the upper water-bearing zone of the upper Floridan Aquifer in the Brunswick area, Georgia, October-November 1990

Joiner, Charles N.

doi:10.3133/ofr91174

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prior to October 1962, the Upper Floridan aquifer below the city of Brunswick, GA, had a hydraulic head of +3 to +5 m. In 1963, a paper mill began pumping roughly 1.4 × 10 5 m 3 freshwater day −1 from the aquifer and within 14 months the head in the aquifer had dropped to −3 m (Wait and Gregg, 1973). Within 30 years, a 5 km 2 subterranean estuary developed beneath the city, rendering the city wells non-potable due to 1-2.5 g/L chloride concentrations (Joiner, 1991). In China, saltwater intrusion along the coastline of the Laizhou Gulf in Shandong Province covered a total area of 16 km 2 in 1979; 10 years later the area of saltwater intrusion was 238 km 2 (Xu et al, 2002).…”

Section: Expansion Of the Subterranean Estuarymentioning

confidence: 99%

Saltwater Intrusion and Submarine Groundwater Discharge: Acceleration of Biogeochemical Reactions in Changing Coastal Aquifers

Moore

Joye

2021

Front. Earth Sci.

View full text Add to dashboard Cite

Intrusion of saltwater into freshwater coastal aquifers poisons an essential resource. Such intrusions are occurring along coastlines worldwide due largely to the over-pumping of freshwater and sea level rise. Saltwater intrusion impacts drinking water, agriculture and industry, and causes profound changes in the biogeochemistry of the affected aquifers, the dynamic systems called subterranean estuaries. Subterranean estuaries receive freshwater from land and saltwater from the ocean and expose this fluid mixture to intense biogeochemical dynamics as it interacts with the aquifer and aquiclude solids. Increased saltwater intrusion alters the ionic strength and oxidative capacity of these systems, resulting in elevated concentrations of certain chemical species in the groundwater, which flows from subterranean estuaries into the ocean as submarine groundwater discharge (SGD). These highly altered fluids are enriched in nutrients, carbon, trace gases, sulfide, metals, and radionuclides. Seawater intrusion expands the subterranean estuary. Climate change amplifies sea level variations on short and seasonal time scales. These changes may result in higher SGD fluxes, further accelerating release of nutrients and thus promoting biological productivity in nutrient-depleted waters. But this process may also adversely affect the environment and alter the local ecology. Research on saltwater intrusion and SGD has largely been undertaken by different groups. We demonstrate that these two processes are linked in ways that neither group has articulated effectively to date.

show abstract

Section: Expansion Of the Subterranean Estuarymentioning

confidence: 99%

Saltwater Intrusion and Submarine Groundwater Discharge: Acceleration of Biogeochemical Reactions in Changing Coastal Aquifers

Moore

Joye

2021

Front. Earth Sci.

View full text Add to dashboard Cite

show abstract

Ground-water conditions in Georgia, 1996

Cressler¹

1997

Open-File Report

View full text Add to dashboard Cite

Groundwater conditions in Georgia during 1996 and for the period of record were evaluated using data from groundwater level and groundwater-quality monitoring networks. Data for 1996 included in this report are from continuous waterlevel records from 71 wells and chloride analyses from 13 wells. Annual mean groundwater levels in Georgia in 1996 ranged from 9.8 feet (ft) lower to 1.8 ft higher than in 1995. Of the 71 wells summarized in this report, 7 wells had annual mean water levels that were higher, 60 wells had annual mean water levels that were lower, and 4 wells had annual mean water levels that were about the same during 1996 as during 1995. Record-low daily mean water levels were recorded in one well tapping the upper Brunswick aquifer, four wells tapping the Upper Floridan aquifer, two wells tapping the Clayton aquifer, and one well tapping a Cretaceous aquifer. These record lows were from 0.1 to 11.4 ft lower than previous record lows. Chloride concentration in water from the Upper Floridan aquifer in most of coastal Georgia was below drinking-water standards established by the Georgia Department of Natural Resources and the U.S. Environmental Protection Agency. In the Savannah area, chloride concentration has not changed appreciably with time. However, chloride concentration in water from some wells that tap the Floridan aquifer system in the Brunswick area exceeds the drinking-water standard. Purpose and Scope This report presents selected groundwater level and groundwater quality data for Georgia for calendar year 1996 and for the period of record. Graphs showing groundwater levels in 71 wells are presented. Graphs show chloride concentrations in water collected from 13 wells tapping the Floridan aquifer system in the Savannah and Brunswick areas. The text includes a brief discussion of the aquifers and aquifer systems, groundwater levels, and chloride concentration in water. An extensive list of references of waterresources investigations are presented in "Selected References"; previously published reports on Georgia groundwater conditions are listed in table 1. Well-Numbering System Wells described in this report are numbered according to a system based on the USGS index of topographic maps of Georgia. Each? 1/2-minute topographic quadrangle in the State has been assigred a three to four-digit number and letter designation (example, 07H, 11AA) beginning at the southwestern corner of the State. Numbers increase sequentially eastward and letters advance alphabetically northwrd. Quadrangles in the northern part of the State are designated by double letters; AA follows Z, and so forth. The letters "I", "O", "II", and "OO" are not u-ed. Wells inventoried in each quadrangle are numbered consecutively, beginning with 01. Thus, the fourth well inventoried in the 11 AA quadrangle is designated 11AA04.

show abstract

Chloride concentrations in the upper water-bearing zone of the upper Floridan Aquifer in the Brunswick area, Georgia, October-November 1990

Cited by 2 publications

References 0 publications

Saltwater Intrusion and Submarine Groundwater Discharge: Acceleration of Biogeochemical Reactions in Changing Coastal Aquifers

Saltwater Intrusion and Submarine Groundwater Discharge: Acceleration of Biogeochemical Reactions in Changing Coastal Aquifers

Ground-water conditions in Georgia, 1996

Contact Info

Product

Resources

About