{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture 26 Apr 2 2008 Hydrogeology Part 2

Lecture 26 Apr 2 2008 Hydrogeology Part 2 - Typically we...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Typically, we pump out the groundwater that we need. In the case of excessive withdrawal, the water table can be lowered. Shown here is a local cone of depression. The water table can be lowered over a whole region if pumping and withdrawal outpace recharge by rainfall and infiltration.
Background image of page 2
The geology of the subsurface can be complex. Differences in permeability can cause groundwater to perch above the regional water table.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Layers of low permeability can confine an aquifer. In a confined aquifer, the water can be under pressure.
Background image of page 4
Putting a number of elements of a heterogeneous geological subsurface together makes for a complex distribution of groundwater resources.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
All sources of drinking water contain some naturally occurring dissolved chemicals. Water is a good solvent Rocks and minerals dissolve to some extent in water Human activities can introduce undesirable contaminants to water supplies. There are chemicals dissolved in water! There are chemicals dissolved in water!
Background image of page 6
Most contaminants of concern are related to human activities of agriculture, industry, transportation, and waste disposal . There are relatively few natural geological sources of contaminants. Contaminants in Water
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Common agricultural practices include the application of fertilizers, herbicides, and pesticides.
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}