Hot deserts - Thar

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  • Hot Deserts Thar Desert
    • Challenges
      • Extreme Temprature
        • The temperature can exceed 50 degrees in the summer making it harder to mine farm and be tour guides. This makes development more difficult.
      • Water Supply
        • Only 120-240mm of rain falls per year so the water must be used efficiently and sustainably.
        • Over irrigation has occured in some parts. The waterlogged ground's water dries up leaving salt behind which makes it harder to grow crops.
      • Inaccessibility
        • The desert covers 200000 sq km
        • Poor infrastructure matched with extreme environmental conditions makes most parts inaccessible
        • This boosts the rich and poor divide. Tourists only go to accessible places such as Jaisalmer but not the other places which are poorer.
    • Opportunities
      • Tourism
        • Important source of income. Creates jobs for people.
        • Jaisalmer - located on an ancient trading highway. (East to West)
        • Tourists explore the desert on camels with local guides.
      • Mining
        • Valuable reserves of minerals such as gypsum.
        • Limestone and Marble are quarried which are used in building and construction.
        • The minerals are used to produce a variety of things such as cement and fertilisers.
      • Energy
        • Wind energy - Turbines
        • Renewable energy such as solar panels are used to desalinate.
      • Farming
        • Irrigation has made it possible for large scale farming.
        • Producing crops such as wheat and cotton has created jobs and generated income for the local economy.
        • Mini drainage basins allow rain water to collect for grazing animals.
    • Characteristic
      • Sandy, infertile soil. Little organic matter.
      • NW India into Pakistan. Most densely populated desert.
      • Sandy hills, Sand dunes, Small trees and shrubs
    • Desertification
      • Reducing risk of desertification
        • Growing crops that don't need much water- reduces water use.
          • Using drip irrigation on crops
            • Means soil isn't eroded by lots of water being added in one go.
      • Causes
        • Climate Change
          • Higher temperatures so more evaporation.
            • Makes the soil drier - plants die - roots don't hold soil together anymore.
          • Less rainfall
            • Less water for plants to grow so they die.
            • Roots hold soil together, plants die= Soil is easily eroded

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