Examples of landfill-generated plumes in low-relief areas, Southeast Florida

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Authors:Russell, Gary M.; Stewart, Mark; Higer, Aaron L.
Author Affiliations:Primary:
U. S. Geol. Surv., Stuart, FL, United States
Univ. South. Fla., United States
Volume Title:Water Resources Bulletin
Source:Water Resources Bulletin, 23(5), p.863-866. Publisher: American Water Resources Association, Herndon, VA, United States. ISSN: 0043-1370
Publication Date:1987
Note:In English. 2 refs.; sketch maps
Summary:Areas of low topographic relief have low water-table gradients and make the direction of movement of contaminants from landfills in the groundwater difficult to predict from regional gradients alone. The landfill, nearby free-flowing ditches or canals, variations in hydraulic conductivity, and the influence of nearby pumping wells can all affect the direction of flow. In low-gradient areas the concepts of ' upgradient ' and ' downgradient ' are less useful in planning the location of monitoring wells than in areas of higher relief. Low-relief areas also may be affected by the discharge of mineralized water from deeper aquifers, naturally or through irrigation, which can mask geochemical surveys intended to detect landfill leachate. Examples of effects of low topographic relief are noted in southeast Florida where water-table gradients are 0.0007 to 0.0005 feet per foot. Water table mounding beneath the landfill and the drainage effects of nearby ditches and well have created multiple leachate plumes in Stuart where one plume migrated along two narrow zones. In Fort Pierce it was difficult to detect leachate because of mineralized irrigation water and fertilizer runoff from an adjacent citrus grove. (Author 's abstract)
Subjects:Conservation; Engineering geology; Environmental geology; Ground water; Landfills; Models; Monitoring; Movement; Pollution; Surveys; Waste disposal; Water quality; Water table; Broward County Florida; Florida; Martin County Florida; Saint Lucie County Florida; United States; Coral Springs; Fort Pierce; Southeastern Florida; Stuart
Record ID:1988009790
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from USGS product, Selected Water Resources Abstracts, Reston, VA, United States
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