Performance of rainwater harvesting system based on roof catchment area and storage tank capacity

Imroatul C Juliana,Hadi Kardhana,M Syahril Badri Kusuma,Widjaja Martokusumo,M Cahyono,I Iskandar,I Yani,S Ismadji,T.E Agustina,S Hasyim,L.N Komariah

doi:10.1051/matecconf/201710105014

Abstract

Increasing population growth has created problems in water resources. Natural water resources become progressively more expensive and difficult to develop. In addition, it is also becoming increasingly polluted and difficult to obtain. Many countries shown a resurgent interest in the use of rainwater harvesting (RWH) technique to overcome these problems. There are several factors that will influence the RWH performance, such as the rainfall, catchment area, storage tank capacity, and water demand. The performance parameter determines by the volumetric reliability, time reliability, and yield. The RWH system used in this study is a simple RWH system that utilizes roof as a catchment area, pipes as a distribution system and tank as a storage. An analysis is carried out to investigate the effect of altering the large of the catchment area and storage tank capacity to the RWH system performance parameters. A suitable behavioral model based on the water balance method is implemented to evaluate the inflow, outflow, and the storage volume. Results demonstrate that with up to 15 years daily rainfall data in 15 cities in Indonesia, the most influential parameters on the performance of RWH system is the time reliability.

Highlights

Human population growth for the last few decades has increased exponentially
This study aims to investigate the contribution of the roof catchment area and storage tank capacities to the alteration of rainwater harvesting (RWH) system performance parameters
This study uses a simple RWH system that used the roof as a catchment area, pipes as a distribution system and tank as a storage

Summary

Introduction

Human population growth for the last few decades has increased exponentially. Increasing human population growth lead to the emergence problems in the water resources either directly or indirectly. In terms of quality or quantity, the usefulness of water will reduce, and water damage will be even greater. The problem of water resources becomes complicated as the lack of management of water resources. If the water resources optimally use and manage, such problems can be avoided. Rainwater is one of the potential water resources that is often overlooked. The potential rainfall-yet- unused rainwater often thrown out into a run-off. Whereas the rainwater can be collected and afterward processes in raw water that is ready to use [1]

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