Fluvial geomorphology
Geography
Matric (grade 12)
,Contents
- Factors influencing surface runoff
- Flow regimes
- Drainage patterns
- Drainage density
- Discharge of a river
- Storm hydrographs
- Stream order
- River processes
- Grade
- Rejuvenation
- River features including diagrams
- River management
, Fluvial Geomorphology
Factors that influence surface runoff and groundwater:
Increased runoff Decreased runoff
gradient steep gentle
vegetation sparse dense
rock type impermeable permeable
soil type not porous (clay) porous (loam/sandy)
soil moisture saturated / wet unsaturated / dry
evaporation rate low (overcast) high
amount of rainfall lots litte
type of rainfall thunderstorms drizzle
Water table:
- Groundwater infiltrates through the soil and percolates (filters) through permeable rock until it
reaches a layer of impermeable rock. The water collects in the pores and cracks of the
permeable rock
- upper level of the zone of saturation
- water table is closer to surface in rainy season
- follows the shape of the land
Types of
rivers/
flow
regimes:
Geography
Matric (grade 12)
,Contents
- Factors influencing surface runoff
- Flow regimes
- Drainage patterns
- Drainage density
- Discharge of a river
- Storm hydrographs
- Stream order
- River processes
- Grade
- Rejuvenation
- River features including diagrams
- River management
, Fluvial Geomorphology
Factors that influence surface runoff and groundwater:
Increased runoff Decreased runoff
gradient steep gentle
vegetation sparse dense
rock type impermeable permeable
soil type not porous (clay) porous (loam/sandy)
soil moisture saturated / wet unsaturated / dry
evaporation rate low (overcast) high
amount of rainfall lots litte
type of rainfall thunderstorms drizzle
Water table:
- Groundwater infiltrates through the soil and percolates (filters) through permeable rock until it
reaches a layer of impermeable rock. The water collects in the pores and cracks of the
permeable rock
- upper level of the zone of saturation
- water table is closer to surface in rainy season
- follows the shape of the land
Types of
rivers/
flow
regimes:
