eastern shore well-logging program 2018 progress
TRANSCRIPT
![Page 1: Eastern Shore Well-Logging Program 2018 Progress](https://reader036.vdocuments.site/reader036/viewer/2022071612/61570931a097e25c7650638e/html5/thumbnails/1.jpg)
• fourth annual logging run
• review background concepts
• log-analysis results
• possible early trends emerging
Eastern ShoreWell-Logging Program
2018 Progress
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Groundwater Flow
ATLANTIC OCEAN
CHESAPEAKE BAY
FRESHSALTY
LAND SURFACE
WATER TABLE
*** VERTICAL SCALE GREATLY EXAGGERATED ***
P R E C I P I T A T I O N
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High Rechargeor Low Withdrawal
ATLANTIC OCEAN
CHESAPEAKE BAY
FRESH
SALTY SALTYDEPRESS
P R E C I P I T A T I O N
RISE
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Low Rechargeor High Withdrawal
ATLANTIC OCEAN
CHESAPEAKE BAY
SALTY SALTY
FRESH
RISE
P R E C I P I T A T I O N
DROP
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Pumping-InducedSaltwater Movement
ATLANTIC OCEAN
CHESAPEAKE BAY
YEARS
DECADES - CENTURIES
FRESH
SALTY
LAND SURFACE
*** VERTICAL SCALE GREATLY EXAGGERATED ***
WELL
UPCONING
WEEKS-MONTHSREVERSIBLE
LATERAL INTRUSION
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ShallowWater-Quality
ChangesATLANTIC OCEAN
CHESAPEAKE BAY
FRESHSALTY
*** VERTICAL SCALE GREATLY EXAGGERATED ***
INUNDATIONINUNDATION
INVERTED SALINITY
INVERTED SALINITY
STORM SURGESTORM SURGE
SURFACE SOURCES
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Saltwater Monitoring
Well-Logging Network
• 12 USGS-DEQ observation wells
• sampled 2003
• logged 2008, 2016, 2017, 2018
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LAND SURFACE
WELL
SCREEN
• direct observation
• costly• slow sample collection• lab analyses
• single water zone
Well-Sample Monitoring
PUMP
SAMPLE
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Well-Log MonitoringLAND SURFACE
LOG
PROBE
RECORDER
“SEES OUT”
WELL•low cost
• fast field method• no lab
• entire profile
• indirect observation
• only shows changes in salinity over time
SCREEN
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Well-Log MonitoringLAND SURFACE
PROBE “SEES OUT”
WELL
SCREEN
ELECTRICAL CONDUCTIVITY
TIME 3TIME 1 TIME 2
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TIME 3TIME 1 TIME 2
Well-Log MonitoringLAND SURFACE
PROBE “SEES OUT”
WELL
SCREEN
ELECTRICAL CONDUCTIVITY
INCREASING
SALINITY
DECREASING SALINITY
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Basis of Method
USGSOpen-File Report
2016-1194
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UNADJUSTED LOGS ADJUSTED LOGS
South Florida Well Logging
1996
2014
18-YEAR RECORD
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New Online Log-Data Resource