Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
Which two projects conserve the Colorado river basin? |
The State Water Project The Central Valley Project |
|
|
What share does California have in the lower basin? |
49% |
|
|
What share does Colorado have in the upper basin? |
52% |
|
|
What share is held by native people who take up 1/3 the land? |
5% |
|
|
Name a native tribe along the Colorado |
Navago |
|
|
What is the concern with native tribes reserving water? |
They will reserve more water then they need to conserve the land when people in urban areas will suffer. What is more valuable; ecosystem health or human life? |
|
|
How many people does the Colorado provide water for? |
40 million |
|
|
How many dams are there on the Colorado? |
11 |
|
|
How much farmland is irrigated by the Colorado? |
1.4 million ha |
|
|
What are shares of water based on and why is this an issue? |
20th century flow levels, flow them was 10% greater so currently over extracting |
|
|
What changes were made to the division scheme in 2007? |
Share of water allowed for extraction is a percentage not an amount so everyone suffers equally if there is a reduction in supply |
|
|
What was California's target for 2016? |
To reduce consumption by 20% |
|
|
What does research into tree rings show? |
Past water levels have been much lower so it's possible that levels are simply returning to normal |
|
|
How many acres of land turned dry as a result of the Hoover dam? |
2 million |
|
|
Why do mountainous areas of California receive more rainfall than others? |
Mt ranges running parallel to the Pacific bring relief rainfall from a prevailing wind in coastal zones |
|
|
What was California's population in 1990, and 2000? |
2 million 35 million |
|
|
What is the relationship between rainfall and demand for water in California? |
75% rainfall in North 75% demand in South |
|
|
Which famous desert landforms are in Southern California? |
Mojave Desert Salton Sea Death Valley |
|
|
Why are regions of California very dry? |
High pressure systems in Pacific block moist air La Nina brings drought Rainfall seasonal |
|
|
What is grown plentifully in the Imperial Valley and why is this a problem? |
Alfalfa, this requires a lot of water to grow and is exported to Beijing (this is cheaper than transporting it to other US states). In other water short regions, there is not enough feed to keep animals alive |
|
|
How many golf courses are there in California? |
1,130 |
|
|
Who's consumption has been compromised in the division scheme? |
Mexico, 10%? |
|
|
How big is the Salton Sea wildlife refuge? |
376 miles2 |
|
|
By how much is the annual number of visiting tourist decreasing and why? |
500,000 The sea is becoming toxic; salt content is 25% higher than the Pacific, this and eutrophication causes a decline in fish stocks |
|
|
What is the local economy based on and how does this effect the sea? |
Cotton, citrus and sugar beet All require large amounts of chemical fertiliser (also pollution from chlorine) |
|
|
Which delta is prone to flooding? How many people live on this low lying land? |
Sacramento San Joaquin River Delta 500,000 |
|
|
How will the restoration plan maintain agriculture in the Delta? |
Evaporation ponds will isolate toxic water Freshwater will be diverted from the Colorado to reduce toxicity and salinity |
|
|
How will the restoration plan restore wildlife? |
A sustainable nutrient mix will be used for farming that will not cause eutrophication The Salton Sea may be left to completely dry up Desalination plants help keep up the demand for water |
|
|
Which man made lake was made by the Hoover Dam and what is its current level? |
Lake Mead 18% full capacity |
|
|
What was the Hoover Dam known for when it was built? State the negative |
Largest concrete structure Each tonne of concrete releases a tonne of CO2 in production and whilst setting |
