examreview

examreview - Water scarcity Water is scarce in the Middle...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Water scarcity- Water is scarce in the Middle East, India, and N. Africa- Vegas has a growing population; least water entering city- There has been an increase in withdrawals in US and Asia Water used for:- Agriculture (most) -- 1- Industrial -- 3- Reservoirs -- 4- Domestic (most waste) -- 2 Water Budget- Input – Output = Delta Storage o Precipitation – (Evaporation + Runoff) = Delta Storage- Globally, water is in equilibrium (different areas change)- Shows how much is in soil-moisture zone (hydrologic bank) o Where water is stored- Potential: what COULD evaporate under optimum conditions- Actual: what is allowed to evaporate When Water Reaches Surface:- Water either flows over the land or soaks into the soil- Infiltration: soaking into subsurface (short term)- Percolation: water further permeates downward (long term)- Evapotranspiration: water evaporated from soil or vegetation- Runoff: water flows overland o Highest amount at equator (ITCZ) Aquifers- Groundwater: largest potential freshwater source o Tied to infiltration (if polluted, irreversible) o Slow moving- Groundwater mining: confined aquifer is pumped beyond flow and recharge capacities. o Permanent removal- Unconfined Aquifer: easy to recharge; pollutants can easily enter o Wells, springs- Aquiclude: clay layer; makes pressure. Confined aquifer o 2 water tables; not as easily polluted o Artesian wells, harder to get to- Drawdown: water table lowered. The faster you pump, the greater the drawdown. (Cone of depression pump, the greater the drawdown....
View Full Document

This note was uploaded on 03/21/2008 for the course GEOG 110 taught by Professor Konrad during the Spring '08 term at UNC.

Page1 / 10

examreview - Water scarcity Water is scarce in the Middle...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online