Factors effecting the shape of a storm Hydrograph
- Created by: Ellieviolet
- Created on: 16-03-19 11:24
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- factors affecting a hydrograph
- Basin size
- Smaller basins lead to a rapid water transfer and so create a flashy hydrograph. Larger basins result in slow water transfer and so a subdued hydrograph.
- Drainage density
- lots of streams and tributaries allow faster water transfer and so create a flashy hydrograph. Less of them lead to slower water transfer and so a subdued hydrograph
- Basin shape
- Steeper sides are linked to flashy hydrographs, shallow sides are linked to subdued hydrographs
- Deforestation
- less vegetation leads to more surface runoff so a flashy hydrograph, more vegetation leads to a subdued hydrograph
- relief
- low-lying land will collect more water and lead to a flashy hydrograph, higher areas are more likely to drain water and lead to a subdued hydrograph
- soil water state
- soil that is already saturated cannot absorb water which leads to a flashy hydrograph, dry ground will lead to a subdued hydrograph
- Agriculture
- more agriculture means more land has been cleared which leads to more runoff and so a flashy hydrograph, less agriculture leads to a subdued hydrograph
- Rainfall intensity
- heavy rainfall produces more water and leads to a flashy hydrograph, lighter rainfall leads to a subdued hydrograph
- Urbanisation
- urbanisation leads to more impermeable surfaces which leads to a flashy hydrograph
- vegetation cover and type
- less vegetation leads to a flashy hydrograph, more leads to a subdued hydrograph
- Basin size
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