geos112gw

Information about geos112gw

Published on January 16, 2008

Author: Ubert

Source: authorstream.com

Content

GROUNDWATER:  GROUNDWATER Groundwater:  Groundwater What happens to precipitation once it reaches the ground infiltration percolation Water filling pore space, cracks & crevices in rocks- Porosity Aquifer- Geologic unit that can store, transmit and yield appreciable amounts of water Porosity and Permeability:  Porosity and Permeability Porosity % of rock or sediment that is open (void spaces) ability to hold water Permeability- ability to transmit water Movement of ground water :  Movement of ground water Moves in response to differences in water pressure & elevation Velocity influenced by Slope of water table Permeability Aquifers:  Aquifers Geologic unit that can store, transmit and yield appreciable amounts of water Highly permeable & saturated with water Good aquifers Aquitards- impermeable Unconfined aquifer open to atmosphere Confined aquifer under pressure artesian- flows w/o being pumped Groundwater Movement:  Groundwater Movement Darcy’s Law Q= KA (h1-h2)/(l) Where Q is discharge; A= BxW K is hydraulic conductivity (h1-h2)/(l) is hydraulic gradient Wells:  Wells Penetrate aquifer within the saturated zone Water table rises and falls during seasons Recharge Cone of depression Drawdown Artesian well- no need to pump Artesian aquifer Cone of Depression:  Cone of Depression Slide15:  After pumping in a well stops, the water level slowly recovers its previous level and the cone of depression disappears Springs and Streams:  Springs and Streams Spring Water table intersecting hillside Gaining stream= Effluent Stream Losing stream= Influent Stream Springs and Streams:  Springs and Streams Spring Water table intersecting hillside Gaining stream= Effluent Stream Losing stream= Influent Stream WT WT Pollution of Ground Water:  Pollution of Ground Water Pollutants Chemicals Gasoline Pesticides & herbicides Fertilizers Heavy metals Bacteria, viruses, parasites- Sewage Acid mine drainage Radioactive waste Natural pollution Balancing Withdrawal & Discharge:  Balancing Withdrawal & Discharge Overpumping results in: Falling water table Ground subsidence Artificial recharge Slide32:  Subsidence of land caused by extraction of groundwater in the San Juaquin Valley, CA The land sank 9m or 30 ft in 52 years Effects of Groundwater Action:  Effects of Groundwater Action Karst topography-Caves Rock usually limestone Dissolves by weakly acidic water rainwater pH 5.5 and carbonic acid from humus Dripstone- Speleothem stalagtite stalagmite Flowstone Sinkholes Slide39:  GUILIN DISTRICT, CHINA Hot Water Underground:  Hot Water Underground Hot springs Near magma or cooling igneous rocks Deep-circulating groundwater or Geyser Precipitation of dissolved ions Travertine- calcite Sinter- silica Mudpot Geothermal Energy Hot Water Underground:  Hot Water Underground Hot springs Near magma or cooling igneous rocks Deep-circulating groundwater or Geyser Precipitation of dissolved ions Travertine- calcite Sinter- silica Mudpot Geothermal Energy

Related presentations


Other presentations created by Ubert

Deltas
09. 01. 2008
0 views

Deltas

Perfumes
10. 01. 2008
0 views

Perfumes

Powerpoint Programas Co 12
11. 01. 2008
0 views

Powerpoint Programas Co 12

Religion and Everyday Life
14. 01. 2008
0 views

Religion and Everyday Life

English Monolingual Lexicography
14. 01. 2008
0 views

English Monolingual Lexicography

AquaticBiome APES
15. 01. 2008
0 views

AquaticBiome APES

ww5
15. 01. 2008
0 views

ww5

session 37 Adrienne Jeffries
17. 01. 2008
0 views

session 37 Adrienne Jeffries

Calibration Management
18. 01. 2008
0 views

Calibration Management

Orbital Mechanics Overview 2
11. 01. 2008
0 views

Orbital Mechanics Overview 2

PROCUREMENT WORKSHOP MRanger
22. 01. 2008
0 views

PROCUREMENT WORKSHOP MRanger

Life of a slave 2
24. 01. 2008
0 views

Life of a slave 2

Starting a Voices group final
04. 02. 2008
0 views

Starting a Voices group final

application programming
04. 02. 2008
0 views

application programming

Top 10 final
22. 01. 2008
0 views

Top 10 final

2006 opslesson11a
28. 01. 2008
0 views

2006 opslesson11a

amoussou
29. 01. 2008
0 views

amoussou

StarryM 0703
24. 01. 2008
0 views

StarryM 0703

2007524105753299
15. 01. 2008
0 views

2007524105753299

Renal pathology for web
25. 02. 2008
0 views

Renal pathology for web

Chapter 10 Spirit of Baroque
26. 02. 2008
0 views

Chapter 10 Spirit of Baroque

Scharf Sleep September21 1st
28. 02. 2008
0 views

Scharf Sleep September21 1st

earlyeuropeanmedicine
11. 03. 2008
0 views

earlyeuropeanmedicine

Hansford Ucam Ozone
20. 02. 2008
0 views

Hansford Ucam Ozone

AAS207Excite
19. 03. 2008
0 views

AAS207Excite

aetna presentation
15. 01. 2008
0 views

aetna presentation

no09
21. 03. 2008
0 views

no09

Desert
03. 04. 2008
0 views

Desert

Session 6 Malaysia MMU
08. 04. 2008
0 views

Session 6 Malaysia MMU

3490 Class 8
16. 04. 2008
0 views

3490 Class 8

2007041716325228351
24. 04. 2008
0 views

2007041716325228351

Cassini Huygens
09. 01. 2008
0 views

Cassini Huygens

ngupdate 2008
08. 05. 2008
0 views

ngupdate 2008

1 20080331132330
02. 05. 2008
0 views

1 20080331132330

Wedding Gown Ideas
05. 02. 2008
0 views

Wedding Gown Ideas

DeepImpact
09. 01. 2008
0 views

DeepImpact

T1Wk10 Wave Properties
14. 02. 2008
0 views

T1Wk10 Wave Properties

denardi sab06 srw
13. 01. 2008
0 views

denardi sab06 srw

BusinessLaw
04. 02. 2008
0 views

BusinessLaw