Closed system : This means that there is a fixed amount of water in the system.
Stores
1. The atmosphere
2. The land
3. The sea
Flows (or transfers)
1. Evaporation
2. Condensation
3. Overland flow
4. Throughflow
Drainage basins : Every river has this system,it is small-scale of hydrological cycle. (open system )
Open system : The amount of water in the system in the basin varies over time.
Discharge : The amount of water carried by a river at any one time.
Hydrograph : A graph showing the discharge of a river over a given period of time.
Storm hydrograph : Records the changing discharge of a river after a passing rainstorm.
Lag time : This delay between peak rainfall and peak discharge.
Number of factors affecting the critical time lag of storm
1. The amount and the intensity of the rain
2. Temperatures are significant
3. Land use
4. Steep slopes
5. Rock type
6. Dams and reservoirs
Weathering : İnvolves elements of the weather,particulary rainfall and temperatures.
Mass movement : The movement of weathered material down a slope due to the force of gravity.
Rivers have energy this means that they can do work.Write down 3 works that rivers do.
1. Erosion
2. Transport
3. Deposition
Attrition : Material being carried by a a river becoming rounder and smaller as they constantly collide with each other.
Long profile : Of a river runs from its source to the point where it enters the sea,a lake or joins another and larger river.
Fresh water is needed for the following purposes:
1. Domestic use
2. İndustrial use
3. Agricultural use
4. Leisure use
All forms of water use involve two key elements:
1. Demand- this is the need for water for a range of uses.
2. Supply – That is meeting the demand for water by tapping various sources, such as groundwater,lakes and rivers.
Water balance : For any country or area within it ,it is possible to