water cycle

Question 1

how much of water is fresh and atmospheric

Answer 1

2.5% fresh 0.4% of which is atmospheric

Question 2

what is a water balance

Answer 2

the diffrence between the input and the output of a water system

Question 3

what is a simple regime

Answer 3

a river that has seasonally high and low periods of discharge, usually through 1 climate and from mountainous glacial melt water

Question 4

what is a complex regime

Answer 4

river crosses multiple climate zones and experiences the effects of the different climates

Question 5

what is a storm hydrograph

Answer 5

shows the relation between the discharge in the river an the amount of precipitation as well as the lag time between the result of the precipitation and the river discharge

Question 6

name 3 factors that wold effect the storm hydro graph

Answer 6

-urbinsation -concrete affects surface run off
-rock permeability
-agriculture
- water management/ storing water up stream

Question 7

what are the 3 types of drought

Answer 7

meteorological- high degree of dryness in comparison to
hydroligical- short fall in water in a basin
agricultural- not sufficient in water for farming

Question 8

Nile basin case study

Answer 8

• 95% of egypts water needs
• 1929 agreement favoured egypt and sudan however modern day lower basin countrys want to build dams like egypt
  -2010 6 countries singing a new agreement on water useage with the nile
• negotiations between Sudan and Egypt in 2015 means
• no agreement between all coountries so conflict is lilkely

Question 9

how many states involved int the Colorado river agreement 1922

Answer 9

7

Question 10

north south water project

Answer 10

submerge 370km3 of land
bejing has 35% and 40% of arible land
- to much water being drained from southern china
-cost 70 billion
- one from the yanksee
-one from thenyellow river