Design and operational parameters of a rooftop rainwater harvesting system: Definition, sensitivity and verification

2012 ◽  
Vol 93 (1) ◽  
pp. 147-153 ◽  
Author(s):  
J.S. Mun ◽  
M.Y. Han
Keyword(s):  
Rainwater Harvesting ◽  
Operational Parameters ◽  
Rooftop Rainwater Harvesting

scholarly journals Optimal Sizing of Rooftop Rainwater Harvesting Tanks for Sustainable Domestic Water Use in the West Bank, Palestine

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 573
Author(s):  
Sameer Shadeed ◽  
Sandy Alawna
Keyword(s):  
Storage Tank ◽  
Rainwater Harvesting ◽  
West Bank ◽  
Family Members ◽  
Optimal Size ◽  
Storage Tanks ◽  
Domestic Water ◽  
The West ◽  
Average Family ◽  
Rooftop Rainwater Harvesting

In highly water-poor areas, rooftop rainwater harvesting (RRWH) can be used for a self-sustaining and self-reliant domestic water supply. The designing of an optimal RRWH storage tank is a key parameter to implement a reliable RRWH system. In this study, the optimal size of RRWH storage tanks in the different West Bank governorates was estimated based on monthly (all governorates) and daily (i.e., Nablus) inflow (RRWH) and outflow (domestic water demand, DWD) data. In the estimation of RRWH, five rooftop areas varying between 100 m2 and 300 m2 were selected. Moreover, the reliability of the adopting RRWH system in the different West Bank governorates was tested. Two-time series scenarios were assumed: Scenario 1, S1 (12 months, annual) and scenario 2, S2 (8 months, rainy). As a result, reliable curves for preliminary estimation of optimal RRWH storage tanks for the different West Bank governorates were obtained. Results show that the required storage tank for S1 (annual) is more than that of the S2 (rainy) one. The required storage tank to fulfill DWD is based on the average rooftop area of 150 m2, the average family members of 4.8, and the average DWD of 90 L per capita per day (L/c/d) varies between (75 m3 to 136 m3) and (24 m3 to 84 m3) for S2 for the different West Bank governorates. Further, it is found that the optimal RRWH tank size for the 150 m2 rooftop ranges between 20 m3 (in Jericho) to 75 m3 (in Salfit and Nablus) and between 20 m3 (in Jericho) to 51 m3 (in Jerusalem) for S1 and S2 scenarios, respectively. Finally, results show that the implementation of an RRWH system for a rooftop area of 150 m2 and family members of 4.8 is reliable for all of the West Bank governorates except Jericho. Whereas, the reliability doesn’t exceed 19% for the two scenarios. However, the reduction of DWDv is highly affecting the reliability of adopting RRWH systems in Jericho (the least rainfall governorate). For instance, a family DWDv of 3.2 m3/month (25% of the average family DWDv in the West Bank) will increase the reliability at a rooftop area of 150 m2 to 51% and 76% for S1 and S2, respectively.

In-situ treatment of fluoride in a hard rock setting by rooftop rainwater harvesting recharge scehme

2019 ◽  
Author(s):  
P.R Pujari ◽  
C. Padmakar ◽  
R. Quamar ◽  
L. Deshpande ◽  
R. Janipella ◽  
...  
Keyword(s):  
Hard Rock ◽  
Rainwater Harvesting ◽  
Rooftop Rainwater Harvesting

scholarly journals Inversión máxima para incrementar la disponibilidad de agua en comunidades de la zona limítrofe entre Quintana Roo y Campeche, México

2021 ◽  
Vol 2 (5) ◽  
pp. 6475-6490
Author(s):  
Roberto Mena Rivero ◽  
Ricardo Enrique Vega Azamar ◽  
Flor Virginia Cruz Gutiérrez ◽  
David Gustavo Rejón Parra ◽  
Fermín Téllez Gómez
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Catchment Area ◽  
Storage Capacity ◽  
Rainwater Harvesting ◽  
Supply System ◽  
Quintana Roo ◽  
Problematic Situation ◽  
Supply Problem ◽  
Rooftop Rainwater Harvesting

La baja disponibilidad de agua potable de buena calidad puede ser complementada con agua proveniente de la lluvia, si esta última es recolectada en cantidad suficiente para cubrir la demanda, aprovechándose esta combinación para resolver el problema de abastecimiento, todo esto sujeto a restricciones de inversión. El presente trabajo tiene por objetivo presentar un análisis de los sistemas de captación de agua de lluvia existentes en la zona limítrofe entre los estados mexicanos de Quintana Roo y Campeche para estimar los montos de inversión máxima que justifiquen un proyecto de mejora en la disponibilidad de agua de lluvia. En esta investigación se identificó el nivel de aprovechamiento y los requerimientos de los sistemas de captación de agua pluvial en techos (SCAPT) y se determinó el monto de inversión máxima para solucionar esta situación problemática. Los resultados muestran que los SCAPT no se aprovechan debido a limitaciones o subutilización en la superficie de captación y/o capacidad de almacenamiento, por lo que se recurre al suministro de agua en pipas. Se concluye que se puede sustituir el acarreo en pipas por agua de lluvia con un adecuado dimensionamiento de la superficie y el volumen de captación, asegurando el consumo de agua mínimo recomendado, con una inversión menor de la que se requeriría para la implementación de un sistema de abastecimiento de agua convencional.   Low availability of good quality drinking water can be complemented with rainwater, if the latter is collected in sufficient quantity to cover the demand, taking advantage of this combination to solve the supply problem, all of this subject to investment restrictions. The present work aims to present an analysis of the existing rainwater harvesting (RWH) systems in the border area between the Mexican states of Quintana Roo and Campeche to estimate the maximum investment amount that justifies a project to improve rainwater availability. In this research, the use level and the requirements of rooftop rainwater harvesting (RTRWH) systems were identified and the maximum investment amount needed to solve this problematic situation was determined. Results show that RTRWH systems are not used due to insufficient or underutilized catchment area and / or storage capacity, so water is supplied in tankers. It is concluded that transport in tankers can be replaced by RTRWH with an adequate dimensioning of surface and catchment volume, ensuring the minimum recommended water supply, with a lower investment than that required for the implementation of a conventional water supply system.

Willingness to Invest in Rooftop Rainwater Harvesting

2017 ◽  
Vol 6 (2) ◽  
pp. 30-36
Author(s):  
Maniklal Adhikary ◽  
Samrat Chowdhury
Keyword(s):  
Water Supply ◽  
Urban Areas ◽  
West Bengal ◽  
Rainwater Harvesting ◽  
Household Demand ◽  
Cross Sectional ◽  
Explanatory Variables ◽  
Municipal Water Supply ◽  
Rooftop Rainwater Harvesting ◽  
Household Heads

Water is increasingly becoming scarce across not only in India but also in World. This paper aims at bringing out the factors responsible for a household's decision to invest in rooftop rainwater harvesting. The paper is based on cross sectional sample of 230 houses from Urban Areas of Hooghly District in West Bengal. The study is conducted in an area which has piped municipal water supply. The study finds that a large number of explanatory variables like income of the household, coping cost incurred by the household positively and significantly affect household's decision to invest in rooftop rainwater harvesting. However, the household demand for water is negatively related to willingness of the household to adopt rooftop rainwater harvesting. Household heads that are educated are more likely to invest in rooftop rainwater harvesting. Houses which are comparatively new or constructed in last five years, as well as households who also undertake gardening are also more likely to invest in rooftop rainwater harvesting as compared to households without the features.

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