Rivers Floods and Management 1

Mind Map by , created over 5 years ago

Hydrological Cycle River Discharge Long Profile valley profile

Tags No tags specified
Created by merrettn over 5 years ago
med chem 2
Biology B2.3
Jade Allatt
Organic Chemistry
Megan Tarbuck
Using GoConqr to study Art
Sarah Egan
valentina brizio
A-level French Vocabulary
Andrea Leyden
Key Shakespeare Facts
Andrea Leyden
Geography Coastal Zones Flashcards
Zakiya Tabassum
Presentations in English
Alice ExamTime
Rivers Floods and Management 1
1 The Hydrological Cycle
1.1 Open System
1.2 Watershed
1.2.1 Boundary of the drainage basin
1.3 Inputs
1.3.1 Precipitation
1.4 Storage
1.4.1 Interception
1.4.2 Vegetation storage
1.4.3 Groundwater storage
1.4.4 Channel storage
1.5 Flows and Processes
1.5.1 Suface Runoff Water flowing over the land
1.5.2 Infiltration Water soaking into the soil
1.5.3 Groundwater flow Water flowing slowly in the water table
1.5.4 Throughflow Water moving slowly downhill through the soil
1.5.5 Percolation water seeping through the soil
1.6 Outputs
1.6.1 Evaporation water turning from a liquid to a gas
1.6.2 Transpiration Evaporation from the leaves
1.6.3 Evapotranspiration evaporation and transpiration together
2 Water balance
2.1 water surplus --> water depletion --> water recharge
3 River Discharge
3.1 The volume of water flowing in a river
3.1.1 Hot weather can cause a decrease in river discharge as more is being evaporated
3.1.2 Abstraction can cause a reduction in discharge
3.2 Storm Hydrographs show river discharge over time
3.2.1 Rock type affects lag time and peak discharge
3.2.2 Soil type affects lag time and peak discharge
3.2.3 Precipitation affects peak discharge
3.2.4 Temperature affects peak discharge and lag time
4 The Long Profile
4.1 Types of Erosion
4.1.1 Abrasion Eroded pieces of rock srape and rub against the bed, the sandpaper effect
4.1.2 Hydraulic action The pressure of water breaks off rock partiles away from the beg
4.1.3 Corrosion The dissolving of rock by chemical processes.
4.2 Transportation and Deposition
4.2.1 Solution Dissolved material being carried along
4.2.2 Suspension Silt and Clay are carried along in the water
4.2.3 Saltation Material bouncing along the river bed
4.2.4 Traction Large boulders roll along the river bed
4.2.5 Deposition occurs when the river doesnt have enough energy, this can occur when the discharge decreases
4.3 The Hjulstrom Curve
4.3.1 The link between the rivers velocity and the competence
5 Channel Charateristics
5.1 Long Profile
5.1.1 Shows the gradient of the river channel as the distance increasing
5.2 The velocity and discharge of a river increases as you go downstream
5.2.1 Effiiency is measured by hydraulic radius
5.3 Upper Stage
5.3.1 Steep V shape. High Vertical Erosion. Large particles are transported. Little deposition.
5.4 Middle Stage
5.4.1 Wider Valley. More later erosion. Deposition causes floodplain. particle size decreases
5.5 Lower Stage
5.5.1 Very Wide Valley. Low turbelance. Smaller Particles