retake

% of water on earth considered freshwater- 3%

Ground water- exists in areas of porous rock underground and impervious surfaces decrease the rate of groundwater recharge

Result of groundwater depletion- lowering of the water table

Cone of depression result- saltwater intrusion

Distribution of freshwater resources on earth- human populations not aligned with freshwater access

Dam benefits- provide divertable water source for areas which are water poor

Concerns regarding dam sediment build up- reduces power generation, starves downstream water of nutrients, buildup of pollutants

Water in reservoir compared to water downstream from dam- colder and more nutrient rich

Largest hydroelectric dam- E. China

Diversion of water from Colorado River- loss of water volume in Lake Meade

Draining of Aral Sea- result of irrigation to regional cotton fields

Boiling water to distill freshwater from salt- Desalination

Biggest environmental cost of desalination- Salt Brine

Drip Irrigation- several crops on the farm, shallow sandy soil

Irrigation paired with advantage/disadvantage- Flood irrigation is often used in agricultural fields, however, it increases surface erosion and salinization of the soil

Greatest % of domestic use of water in US- flushing toilets

Gray water- water used for bathing and washing clothes

Why Mexico City sinking- Soil under city compacting with the aquifer that once supported it depleted

Economic consequence Lake Powell diversion- Increased electricity prices due to a decrease in production at the Glen Canyon Dam

Freshwater stored (largest to smallest supply)- Ice Caps/Glaciers -> Groundwater -> River & Lakes

Human health concern related to Aral Sea shrink- Respiratory illness from dried sediments

50% of world’s desalinated water- middle east

Loss of the least amount of water by evaporation- drip irrigation

Best explains bar graphs above- fruits and veggies give the greatest monetary return per water usage

Highest % of residential water usage in US- Outdoor uses

Greater groundwater depletion- increase in impervious surfaces, low cost of water, lack of ownership of water resources

Ogallala Aquifer- underlies the united states high plains, being depleted by overuse

Process depicted in image below (Applied pressure/pure water)- Reverse osmosis

Conclusions drawn from data in chart only- Increased water use is generally correlated with lower water prices

True about confined and unconfined aquifers - I, II, III, and V

Mrs. Boccher's family uses 220 gallons of water per day

Economic benefits of building large dams - I and III

Concerns regarding sediment build up behind a dam - II, III, & IV only

True about 3 Gorges Dam - III, IV, & V

Draining of the Aral Sea - Irrigation of regional cotton fields

Highest % of US water usage - Outdoor uses

Freshwater= 3%

Freshwater stored (largest to smallest supply)= Ice Caps/Glaciers -> Groundwater -> River & Lakes

Ground water= areas of porous rock underground, impervious surfaces decrease groundwater recharge

Result of groundwater depletion= lowering of the water table

Greater groundwater depletion= increase in impervious surfaces, low cost of water, lack of ownership of water resources

Cone of depression result= saltwater intrusion

Distribution of freshwater resources= population not aligned with freshwater access

Dam benefits= provide divertable water source for areas which are water poor

Dam sediment build up= reduces power gen, starves downstream water of nutrients, buildup pollutants

Water in reservoir vs. water downstream from dam= colder and more nutrient rich

Largest hydroelectric dam= E. China

Diversion of water from Colorado River= loss of water volume in Lake Meade

Draining of Aral Sea= result of irrigation to regional cotton fields

Human health concern related to Aral Sea shrink= Respiratory illness from dried sediments

Boiling water to distill freshwater from salt= Desalination

Biggest environmental cost of desalination= Salt Brine

50% of world’s desalinated water= middle east

Drip Irrigation= several crops on the farm, shallow sandy soil

Loss of the least amount of water by evaporation= drip irrigation

Irrigation paired with advantage/disadvantage= Flood irrigation is often used in agricultural fields, however, it increases surface erosion and salinization of the soil

Greatest % of domestic, residential use of water in US= flushing toilets, outdoor uses

Gray water= water used for bathing and washing clothes

Mexico City sinking= Soil under city compacting with the aquifer that once supported it depleted

Economic consequence Lake Powell diversion= Increased electricity prices due to a decrease in production at the Glen Canyon Dam

Best explains bar graphs above= fruits and veggies give the greatest monetary return per water usage

Process depicted in image below (Applied pressure/pure water)= Reverse osmosis

Conclusions drawn from data in chart only= Increased water use is generally correlated with lower water prices

Ogallala Aquifer= underlies the united states high plains, being depleted by overuse