CONTENTS

Contents Page No INTRODUCTION

֍ BASIC CONCEPT OF RAIN WATER HARVESTING 1 - 3

What is Rain Water Harvesting Why Harvest Rain Water

֍ QUALITY & QUANTITY OF RAIN WATER 4 - 7

Quality & Quantity of Harvested Rain Water Rain Falls Regions Measurements

֍ PROCESS OF RAIN WATER HARVESTING 8 - 11

Methods Surface Runoff Harvesting Roof Top Rain Water Harvesting

Components Catchment Area Gutters & Down take Pipes First Flush Filter

֍ TYPES OF FILTER 11 - 13

Sand Gravel Filter Charcoal Filter PVC – Pipe Filter Sponge Filter

֍ IDEAL USES OF HARVESTED RAIN WATER 13 - 14

Gardening & External Uses Recharging of Under Ground Water Aquifers

֍ TYPES OF RECHARGING GROUND WATER AQUIFERS 14 – 17

Recharging of bore wells Recharging of dug wells Recharge pits Recharge Trenches Soak ways or Recharge Shafts

Percolation Tanks ֍ ADVANTAGES & DISADVANTAGES OF 17 - 19

RAIN WATER HARVESTING

֍ DO’S & DON’TS IN RAIN WATER HARVESTING 19

MAJOR RAIN WATER HARVESTING PROJECT IN KARNATAKA 20֍

PROJECT ON RAIN WATER HARVESTING LITERATURE SURVEY 21

STUDY AREA 21

DESIGN AND TEST 21

ESTIMATION & COSTING OF THE PROJECT 21 - 22

SPECIFICATIONS 22

STUDYING 22

RESULT & DISCUSSION 23

CONCLUSIONS 23

REFERENCE 24