Handbook of Water Harvesting and Conservation

13Return Period Determination for Rainwater Harvesting System Design

Sandeep Samantaray¹, Dillip K. Ghose¹, and Saeid Eslamian²

¹Department of Civil Engineering, NIT, Silchar, 788010, Assam, India

²Department of Water Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran

13.1 Introduction

Rainwater harvesting (RWH) is the accession and accumulation of rainwater from reprocess to runoff. Rainwater is harvested from reservoirs, rivers, or roofs and transported to a deep pit. Uses for rainwater include water for livestock, irrigation, gardens, and domestic purposes. Groundwater recharge is another process for harvesting water. In urban areas, for water harvesting, combined sanitary and stormwater transfer provisions must be designed to include a system for stormwater detention. The systems which collect rainwater and conserves safely are assimilated by the existing system. Unfortunately, many conservation systems require rainwater capture and detention do not allow for harvesting. RWH is an exercise of detention and retention of rainwater to meet up prospective requirements. Various types of RWH system are presented in Figure 13.1.

Figure 13.1 Types of RWH system.

RWH consigns to compilation with store room of rainfall, which aims for yielding surface and groundwater, by preventing the evaporation and seepage loss in a watershed (Agarwal and Narain ...