The conservation and proper management of water is necessary because of following reasons: (i) Growing population :- As population is growing its need for water is also growing, so it is necessary to properly manage the availability of water. (ii) Increasing Urbanisation :- More and more people are moving to cities where need of water is growing. On the other hand, cities are overexploiting and polluting water resources, so there is need to conserve water. (iii) Due to industrialisation also water is being overexploited. So, without proper conservation it would be difficult to survive.