Understanding Contaminant Understanding Contaminant Sources, Ground-Water Residence Sources, Ground-Water Residence Times, and Flow Patterns in a Times, and Flow Patterns in a Karstic Springshed Karstic Springshed Brian Katz, Rick Copeland, Tom Greenhalgh, Brian Katz, Rick Copeland, Tom Greenhalgh, Warren Zwanka, and Sam Upchurch Warren Zwanka, and Sam Upchurch Suwannee River and Estuary Science Workshop Suwannee River and Estuary Science Workshop Cedar Key, Florida, Cedar Key, Florida, September 23, 2004 September 23, 2004
14
Embed
Understanding Contaminant Sources, Ground-Water Residence Times, and Flow Patterns in a Karstic Springshed Brian Katz, Rick Copeland, Tom Greenhalgh, Warren.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Residence Times, and Flow Residence Times, and Flow Patterns in a Karstic Patterns in a Karstic
SpringshedSpringshedBrian Katz, Rick Copeland, Tom Greenhalgh,Brian Katz, Rick Copeland, Tom Greenhalgh, Warren Zwanka, and Sam UpchurchWarren Zwanka, and Sam UpchurchBrian Katz, Rick Copeland, Tom Greenhalgh,Brian Katz, Rick Copeland, Tom Greenhalgh, Warren Zwanka, and Sam UpchurchWarren Zwanka, and Sam Upchurch
Suwannee River and Estuary Science WorkshopSuwannee River and Estuary Science WorkshopCedar Key, Florida, Cedar Key, Florida, September 23, 2004September 23, 2004
Suwannee River and Estuary Science WorkshopSuwannee River and Estuary Science WorkshopCedar Key, Florida, Cedar Key, Florida, September 23, 2004September 23, 2004
NITRATE IN SPRING WATERS, NITRATE IN SPRING WATERS, NORTHERN FLORIDANORTHERN FLORIDA
SOURCES OF NITRATE IN SPRING WATERS
Fannin Springs
Fannin Springshed Study
TYPICAL SPRING TYPICAL SPRING SYSTEMSYSTEM
Spring-water chemistry– reflects the temporal, spatial, and vertical integration of water from the aquifer system.
Can provide important clues about geochemical and hydrologic processes.
MULTIPLE CHEMICAL TRACER APPROACH
SOURCES OF NITRATE CONTAMINATION:SOURCES OF NITRATE CONTAMINATION: 15N/14N (15N and 18O of NO3)
GEOCHEMICAL PROCESS IDENTIFICATION:GEOCHEMICAL PROCESS IDENTIFICATION:18O, 2H, 13C, major ions, nutrients, dissolved gases, DOC
AGE OF SPRING WATERS:AGE OF SPRING WATERS: CFC-11, CFC-12, CFC-113; 3H/3He; SF6
Fannin Springs Study--Source Identification
Cropland farming:Cropland farming:
Herbicides and degradates (36 Herbicides and degradates (36 compounds)compounds)
Triazines, phenylureas, acetanilides, degradatesPesticides and degradates (66 compounds)
Predominant sources of nitrate Predominant sources of nitrate contamination in the Fannin springshed contamination in the Fannin springshed appear to originate from agricultural appear to originate from agricultural activities, based on the detection of activities, based on the detection of elevated potassium, herbicides and their elevated potassium, herbicides and their degradates, and nitrogen isotope ratios.degradates, and nitrogen isotope ratios.
However, other sources such as animal However, other sources such as animal wastes, and or septic tank effluent may wastes, and or septic tank effluent may account for elevated nitrogen isotope account for elevated nitrogen isotope ratios in some wells and Fannin Springs.ratios in some wells and Fannin Springs.
Predominant sources of nitrate Predominant sources of nitrate contamination in the Fannin springshed contamination in the Fannin springshed appear to originate from agricultural appear to originate from agricultural activities, based on the detection of activities, based on the detection of elevated potassium, herbicides and their elevated potassium, herbicides and their degradates, and nitrogen isotope ratios.degradates, and nitrogen isotope ratios.
However, other sources such as animal However, other sources such as animal wastes, and or septic tank effluent may wastes, and or septic tank effluent may account for elevated nitrogen isotope account for elevated nitrogen isotope ratios in some wells and Fannin Springs.ratios in some wells and Fannin Springs.