CHAPTER ONE
- INTRODUCTION
Water can be defined as an ordourless, colourless and tasteless substance that is found on some parts of the earth’s surface and beneath (either in fluid or solid state).  It moves as water vapour, liquid water and ice. It is constantly changing its form and also water on earth is known by different terms, depending on where it is and where it came from.
USES OF WATER
Water as a natural occurrence substance plays a vital role in many aspects in Human life and World development.
Human Uses
Agriculture: the important use of water in agriculture is for irrigation, which is a key component to produce enough food. Irrigation takes up to 90% of water withdrawn in some developing countries.
Recreation: human uses water for many recreational purposes, as well as for exercising and sports. Some of these include swimming, boating water skiing, and surfing. In addition some sports like ice hockey and ice skating are played on ice, Humans also use water for snow sports like snowboarding etc. which require the water to be frozen.
