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A multi-parameter method to quantify the potential of roof rainwater harvesting at regional levels in areas with limited rainfall data

Chapa, Fernando and Krauss, Manuel and Hack, Jochen (2020):
A multi-parameter method to quantify the potential of roof rainwater harvesting at regional levels in areas with limited rainfall data.
In: Resources, Conservation and Recycling, 161. Elsevier, p. 104959, ISSN 09213449,
DOI: 10.1016/j.resconrec.2020.104959,
[Online-Edition: https://doi.org/10.1016/j.resconrec.2020.104959],
[Article]

Abstract

The increasing demand for water in urban areas of developing countries has been given more importance to rainwater harvesting techniques in the last decades. However, there is still a lack of general approaches to show and compare the potential to benefit effectively from direct roof runoff at different locations. Past studies mainly focused on specific design conditions, making it difficult to interpret and upscale their results in zones with similar conditions. This research explores the influence of rainfall characteristics and design parameters: storage tank size, catchment area, and daily water demand on rainwater harvesting systems designed for water supply. Sixteen locations in Ecuador with varying hydroclimatic characteristics were selected to evaluate our metho- dology. A mass balance method using satellite records of the Tropical Rainfall Measuring Mission was employed to estimate optimal dimensions based on the reliability of the system. Our results suggest that locations with similar annual rainfall and seasonality have similar performances of rainwater harvesting systems. Based on that premise, regional approaches can be formulated. They can be employed as a tool to support decision-makers promoting policies related to rainwater harvesting at local and regional scales.

Item Type: Article
Erschienen: 2020
Creators: Chapa, Fernando and Krauss, Manuel and Hack, Jochen
Title: A multi-parameter method to quantify the potential of roof rainwater harvesting at regional levels in areas with limited rainfall data
Language: English
Abstract:

The increasing demand for water in urban areas of developing countries has been given more importance to rainwater harvesting techniques in the last decades. However, there is still a lack of general approaches to show and compare the potential to benefit effectively from direct roof runoff at different locations. Past studies mainly focused on specific design conditions, making it difficult to interpret and upscale their results in zones with similar conditions. This research explores the influence of rainfall characteristics and design parameters: storage tank size, catchment area, and daily water demand on rainwater harvesting systems designed for water supply. Sixteen locations in Ecuador with varying hydroclimatic characteristics were selected to evaluate our metho- dology. A mass balance method using satellite records of the Tropical Rainfall Measuring Mission was employed to estimate optimal dimensions based on the reliability of the system. Our results suggest that locations with similar annual rainfall and seasonality have similar performances of rainwater harvesting systems. Based on that premise, regional approaches can be formulated. They can be employed as a tool to support decision-makers promoting policies related to rainwater harvesting at local and regional scales.

Journal or Publication Title: Resources, Conservation and Recycling
Journal volume: 161
Publisher: Elsevier
Uncontrolled Keywords: Rainwater Harvesting,Stormwater Runoff,Urban Hydrology,Water Balance Model,rainwater harvesting
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Ecological Engineering
Date Deposited: 09 Jun 2020 06:21
DOI: 10.1016/j.resconrec.2020.104959
Official URL: https://doi.org/10.1016/j.resconrec.2020.104959
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