overview of floods and draught

1. FLOODS AND DROUGHTS
This Photo by Unknown Author is licensed under CC BY
This Photo by Unknown Author is licensed under CC BY-ND

2. What are floods ?
 1.an overflow of water
 A form of natural disaster
 Happens when there is too much rain
 Water from the river banks overflows
 Caused by heavy
 rains,tides,storms,hazards etc.

3. INTRODUCTION
This Photo by Unknown Author is licensed under CC BY

4. CAUSES OF FLOODS
 Massive rainfall.
 Overflowing of rivers
 Collapsed dams
 Snowmelt
 Deforestation
 Climate change
 Emission of greenhousegases

5. ADVANTAGES AND DISADVANTAGES OF
FLOODS
 Floods can bring both advantages and disadvantages to an area.
 Floods can deposit rich,fertile alluvium on agriculture areas.
 Also,flood water can replenish irrigation channels.
 On other hand floods can destroy food supplies, homes and transport
infrastructures.
This Photo by Unknown Author is licensed under CC BY

6. WHERE FLOODS ARE MOST COMMON
 Bangladesh has experienced many floods and suffered epedimics such as
diarrhea because of floods.
 40% of Bangladesh land is only 1 meter above sea level,which causes it to
have a large amount of floods.
 Extensive floods in the Mississippi river basin during the spring and
summer of 1993 caused $20billion in damages.
 Floods may occur in cities,towns,farmland,or normally dry valleys.

7. DEFINATION OF DROUGHT
 A drought is a damage of a ground usually caused by
dry weather.

8. INTRODUCTION

9. EFFECTS OF DROUGHT
ECONOMIC
1.farms are effected
2.Damage to crops.
3.Less food production.
ENVIRONMENTAL
1.Diseases
2.Damage to plants.
3.Erosion of soil.
SCIENCE
1.Food shortage.
2.Human deaths.
3.Water user conflicts.

10. CAUSES OF DROUGHT
This Photo by Unknown Author is licensed under CC BY-SA-NC

11. THANK YOU
REVELLI MANOJ KUMAR
20835A0325
MECHANICAL ENGINEERING