INTRODUCTION
Seventy percent of earth surface is occupied by water. If we start measuring water on the earth then the figure will be much more . If all water on earth is imagined to be filled in kerosene bottle(of 700 ml) then available drinkable water will be equal to maximum one tablespoon. Out of which only 7 drops from it will be in the lakes and rivers. Remaining water is percolated as ground water
OBJECTIVES
After reading this lesson , you will be able to
- explain the effects of water level in well
- state different resources of water
- explain the advantages of ground water
- details of the objective of this unit
|
|
