storm hydrographs

storm hydrographs

Which environmental factor can decrease flood risk?

1. Limited land development
2. Ecological restoration
3. Rapid urbanization
4. Protected natural habitats

Which human activity can contribute to flooding?

1. Water conservation
2. Sustainable agriculture
3. Wetland preservation
4. Deforestation

Which of these factors will create hydrograph A and B?

steep slopes 

urbanisation

rural area

deep soil

impermeable surfaces

forest

Urbanisation will...

1. decrease surface runoff
2. increase surface runoff
3. increase infiltration
4. increase interception

How does urbanisation affect storm hydrographs?

1. It has no impact on river discharge patterns
2. It reduces the likelihood of flooding
3. It decreases the volume of surface runoff
4. It can lead to faster and higher peak flows

When there is deforestation..

1. there is less interception and so the soil becomes saturated more quickly, this leads to surface runoff and the water will reach the river more quickly
2. more interception will happen, soil will have chance to infiltrate in the soil and flow to the river underground
3. there are more impermeable surfaces so no interception and more surface runoff and water reaches the river more quickly
4. the soil can be eroded and washed into the river which can decrease the amount of water that can be held in the river, meaning it will be more likely to flood

What is the rising limb of a storm hydrograph associated with?

1. Fluctuations in water temperature
2. Increasing river discharge in response to precipitation
3. Changes in sediment composition
4. Decreasing river discharge due to evaporation

What does a storm hydrograph represent?

1. Rapid changes in river discharge over time
2. Temperature changes during a storm event
3. Average annual precipitation in a region
4. Rate of groundwater infiltration in a watershed

What is the greatest cause of flooding?

impermeable surfaces

deforestation

heavy/ prolonged rainfall

many rivers joining one channel