Droughts
- Created by: Laurenskye
- Created on: 17-05-16 19:41
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- Natural Hazards: Droughts
- What causes drought
- Global warming
- Using too much water
- Deforestation/desertification
- Overgrazing
- Precipitation loss
- Factors affecting the severity of drought.
- Climate
- Areas of low rainfall re more susceptible to drought; temperatures affect evaporation.
- Social
- Demand for water is greater in developed countries
- Economics
- Whether people or countries can afford reservoirs, wells etc.
- Politics
- War can access people's access to water. In developed countries it is easier to implement laws to control people's water use.
- Technology
- New and developed can impact the efficiency of water storage and ways to supply water (plumbing)
- Environment
- Different land uses affect run off rates: Different types of rock allow water to be stored or run across the surface.
- Climate
- Coping with drought
- LEDCs
- Most LEDCs are mostly subsistence communities s therefore they won't be able to grow food or make profit.
- Long term
- These are responses that result in permanent water management measures, which are designed to secure more water for everyday use.
- Construction of dams and pipelines installing irrigation systems
- These are responses that result in permanent water management measures, which are designed to secure more water for everyday use.
- Short term
- Temporary methods used to overcome specific drought events.
- They concentrate on reducing water demand such as water rationing and cash/food aid.
- Temporary methods used to overcome specific drought events.
- LEDCs
- How can the impact of drought be controlled?
- Responses to drought
- Improve forecasting and monitoring
- monitoring of temperatures over time may give advance warning of droughts
- use of satellites to spot early changes in vegetation can help people prepare for droughts
- Improve water conservation and farming methods
- Low tech
- low walls built across fields to reduce run-off
- areas created for tree planting to conserve moisture in soil
- using micro-dams to store water that can then be used for irrigation
- using stone piles to collect water by allowing water to condense onto the cold stones
- planting drought-resistant crops that can withstand a lack of water
- High tech
- drip-and-sprinkle irrigation
- use of concrete water coolers to utilise hot groundwater
- improving water supply and irrigation by building reservoirs and new wells
- cloud seeding - injecting clouds with 'seeds' of silver iodine, salt or dry ice to make the clouds' water or ice particles bigger and yield more rain.
- Low tech
- Improve forecasting and monitoring
- Responses to drought
- What causes drought
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