Rain Water Harvesting

Rainwater Harvesting Scheme

Index

Sl. No. Index Figures and Tables 1.1. 1.2. 1.3. 1.4. 1.5. 1.5.1. 1.5.2. 1.6. 1.7. 1.8. 1.9. Chapter-1: Introduction Overview of Rainwater Harvesting Advantages of Rainwater Harvesting Techniques RHW Methodologies Rainwater Harvesting to Augment Groundwater Resources Need for Rainwater Harvesting to Augment Groundwater Resources Advantages of Rainwater Harvesting to Augment Groundwater Resources Technologies of Rooftop Rainwater Harvesting Roof Rainwater Harvesting System Components Storage Facilities Recharge Structures Chapter-2: Study Area, Soil Quality and Climate of the Area Study Area Climate Rainfall Soil Quality 14-19 Contents Page No. 1-2 2 3-11

12-13

2.1. 2.2. 2.3. 2.4.

Chapter-3: Design Options 3.1. Design Considerations 3.2. Potential Areas 3.3. Methods & Techniques 3.4. Rainwater Harvesting Options 3.4.1. Rooftop Rainwater Harvesting through Recharge Pit 3.4.2. Rooftop Rainwater Harvesting through Recharge Trench 3.4.3. Rooftop Rainwater Harvesting through existing Tube wells 3.4.4. Rooftop Rainwater Harvesting through Recharge Trench with Recharge Well Chapter-4: Assessment of Rainwater Harvesting and Design Considerations 4.1 Computation of Rainfall Values 4.2. Estimation of Runoff using Rational Method 4.3. Estimation of Rainwater Harvesting Potential For a Roof area 4.3.1. Rainwater Harvesting Potential for New Building of Dishergarh Hospital 4.3.2. Rainwater Harvesting Potential for Technical Building of ECL 4.4. Design of Recharge Structures, Settlement tank and Soak way 4.4.1. Design Parameters of a Recharge Trench 4.5. Designed Structures 4.5.1 Design of Coarse Mesh 4.5.2. Design of Conveyance systems or Conduits, Drain and Drain Chamber 4.5.3. Design of Central First Flush 4.5.4. Design of Collection Tank

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20-35

Rainwater Harvesting Scheme

4.5.5. 4.6. 4.7.

Design of Recharge Trench and Percolation Pit with Soakway Steps for Construction of Soak way and Recharge Trench...