Is Rainwater Harvesting Worthwhile? A Benefit–Cost Analysis

Dallman, Suzanne; Chaudhry, Anita M.; Muleta, Misgana K.; Lee, Juneseok

doi:10.1061/(asce)wr.1943-5452.0001361

Cited by 25 publications

(16 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This example is the case of a household's CBA of installing a 1893 liter rainwater barrel and using the captured rainwater for domestic uses, and reduce the use of piped water. This example is taken from Dallman et al (2021) who conducted a CBA of rainwater capture and reuse in Los Angeles. In CBA analysis, net present value (NPV) of the discounted net benefits is to be calculated as follows:…”

Section: Building a Spreadsheet Of The Cba Modelmentioning

confidence: 99%

“…Assuming this household is an average water consumer in Los Angeles, its water charges are $1.68 per cubic meter, based on typical water rates charged by the utilities in the watershed in 2018. Dallman et al (2021) estimated that one 1893 liter barrel captures 15.8 cubic meters of water per year. Therefore, each year the household had a benefit of ($1.68×15.8) about $27 per year.…”

Section: Identifying and Measuring The Benefitsmentioning

confidence: 99%

“…In the example above, Dallman et al (2021) used a time horizon of 30 years and discount rate of 3%. Using Equation (5.1) to calculate NPV was $12.…”

Section: Time Horizon and Discount And Interest Ratesmentioning

confidence: 99%

“…Rainwater harvesting provides a potential source of supplemental water supply to meet increasing urban demand. Dallman et al (2021) undertook a CBA of using captured rainwater as a substitute for a share of municipal water supplied to residential and commercial buildings in the densely urbanized Ballona Creek watershed in Los Angeles, California. This research developed a framework that organizes the diverse variables that may affect the benefits and costs of RWHS to answer several questions: how high are the net benefits of RWHS to replace potable water supplies?…”

Section: Cba Of Rainwater Harvesting Systems (Rwhs)mentioning

confidence: 99%

See 3 more Smart Citations

Embracing Analytics in the Drinking Water Industry

2022

View full text Add to dashboard Cite

Analytics can support numerous aspects of water industry planning, management, and operations. Given this wide range of touchpoints and applications, it is becoming increasingly imperative that the championship and capability of broad-based analytics needs to be developed and practically integrated to address the current and transitional challenges facing the drinking water industry. Analytics will contribute substantially to future efforts to provide innovative solutions that make the water industry more sustainable and resilient. The purpose of this book is to introduce analytics to practicing water engineers so they can deploy the covered subjects, approaches, and detailed techniques in their daily operations, management, and decision-making processes. Also, undergraduate students as well as early graduate students who are in the water concentrations will be exposed to established analytical techniques, along with many methods that are currently considered to be new or emerging/maturing. This book covers a broad spectrum of water industry analytics topics in an easy-to-follow manner. The overall background and contexts are motivated by (and directly drawn from) actual water utility projects that the authors have worked on numerous recent years. The authors strongly believe that the water industry should embrace and integrate data-driven fundamentals and methods into their daily operations and decision-making process(es) to replace established “rule-of-thumb” and weak heuristic approaches – and an analytics viewpoint, approach, and culture is key to this industry transformation. ISBN: 9781789062373 (paperback) ISBN: 9781789062380 (eBook) ISBN: 9781789062397 (ePub)

show abstract

Section: Building a Spreadsheet Of The Cba Modelmentioning

confidence: 99%

Section: Identifying and Measuring The Benefitsmentioning

confidence: 99%

“…In the example above, Dallman et al (2021) used a time horizon of 30 years and discount rate of 3%. Using Equation (5.1) to calculate NPV was $12.…”

Section: Time Horizon and Discount And Interest Ratesmentioning

confidence: 99%

Section: Cba Of Rainwater Harvesting Systems (Rwhs)mentioning

confidence: 99%

See 2 more Smart Citations

Embracing Analytics in the Drinking Water Industry

2022

View full text Add to dashboard Cite

show abstract

“…Traditionally, these models have focused on potable water saving, and by applying continuous mass-balance simulations on rainwater storage tanks, strive to gain insights into the optimal sizing of these tanks [5,6], quantify the water saving potential or the financial viability of installing RWH systems at the examined location [7,8], or include energy savings and carbon emission reduction [9].…”

Section: Introductionmentioning

confidence: 99%

Dual Benefit of Rainwater Harvesting—High Temporal-Resolution Stochastic Modelling

Snir¹,

Friedler²

2021

Water

View full text Add to dashboard Cite

The objective of the presented study was to develop a high-temporal-resolution stochastic rainwater harvesting (RWH) model for assessing the dual benefits of RWH: potable water savings and runoff reduction. Model inputs of rainfall and water demand are used in a stochastic manner, maintaining their natural pattern, while generating realistic noise and temporal variability. The dynamic model solves a mass-balance equation for the rainwater tank, while logging all inflows and outflows from it for post-simulation analysis. The developed model can simulate various building sizes, roof areas, rainwater tank volumes, controlled release policies, and time periods, providing a platform for assessing short- and long-term benefits. Standard passive rainwater harvesting operation and real-time control policies (controlled release) are demonstrated for a 40-apartment building with rainfall data typical for a Mediterranean climate, showing the system’s ability to supply water for non-potable uses, while reducing runoff volumes and flows, with the latter significantly improved when water is intentionally released from the tank prior to an expected overflow. The model could be used to further investigate the effects of rainwater harvesting on the urban water cycle, by coupling it with an urban drainage model and simulating the operation of a distributed network of micro-reservoirs that supply water and mitigate floods.

show abstract

Rainwater for drinking purposes: An overview of challenges and perspectives

Brião,

Cadore,

Graciola

et al. 2024

WIREs Water

View full text Add to dashboard Cite

Research focused on rainwater for human consumption is being conducted in different regions of the world. The systematic review revealed that the inadequate quality of harvested rainwater and its scarcity pose significant barriers to the installation of the catchment of rainwater for noble uses. The improper design of rainwater harvesting systems, often a result of the disregard of critical data, is a crucial factor leading to the development of poorly structured systems and inadequate management of this valuable resource. The absence of scientific knowledge about the process further compounds the problem, leading to a sense of insecurity for potential consumers. Ultrafiltration (UF) membranes, followed by ultraviolet disinfection or chlorination, have shown satisfactory results for the potability of rainwater. Additionally, the implementation of photovoltaic panel energized rainwater UF is both economically and technically feasible, and serves as an alternative to traditional water supply approaches. Most studies focused on the utilization of harvested water for non‐drinking purposes, thereby providing opportunities for new studies into effective treatment methods to cater to local and global potable water demands. Therefore, this review aimed to provide insights into the current progress, future challenges, and opportunities related to rainwater harvesting systems and their treatment for the supply of drinking water.This article is categorized under: Engineering Water > Engineering Water Engineering Water > Sustainable Engineering of Water Engineering Water > Planning Water

show abstract

Is Rainwater Harvesting Worthwhile? A Benefit–Cost Analysis

Cited by 25 publications

References 26 publications

Embracing Analytics in the Drinking Water Industry

Embracing Analytics in the Drinking Water Industry

Dual Benefit of Rainwater Harvesting—High Temporal-Resolution Stochastic Modelling

Rainwater for drinking purposes: An overview of challenges and perspectives

Contact Info

Product

Resources

About