Reliability and financial feasibility assessment of a community rainwater harvesting system considering precipitation variability due to climate change
| Autor: | M. H. Tarek, Mohammad Maksimul Islam, Sadia Afrin, Mujibur Rahman |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Conservation of Natural Resources
Environmental Engineering Climate Change Rain 0208 environmental biotechnology Water supply Climate change 02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law Urban area 01 natural sciences Rainwater harvesting Water Supply Precipitation Waste Management and Disposal Reliability (statistics) 0105 earth and related environmental sciences Estimation Bangladesh geography geography.geographical_feature_category business.industry Reproducibility of Results General Medicine 020801 environmental engineering Feasibility Studies Environmental science Climate model Water resource management business |
| Zdroj: | Journal of Environmental Management. 289:112507 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2021.112507 |
| Popis: | This study proposes a community rainwater harvesting (RWH) system as an alternative water supply solution for Paikgacha, a water-scarce coastal urban area in Bangladesh. Although individual household-based RWH systems have been implemented in many areas in Bangladesh, to date, no study has been conducted designing a community RWH system and assessing its reliability and financial feasibility. This study employs historical observed and available climate model predicted future rainfall data into stormwater management model (SWMM) for rainfall-runoff simulation of the community RWH, and compares SWMM's performance with rational formula based estimation. We then calculate volumetric and time reliability of the proposed system and assess its financial viability. We observe good agreement in reliability curves generated by SWMM and rational formula-based model. Under the historical rainfall scenario, our proposed community RWH shows up to 99% reliability for 100 L per day household demand, given that proper community size and storage tank size are chosen. Predicted rainfall pattern of 2041–2070 period shows similar reliability-tank size relation to that of historical observed rainfall; however, predicted high precipitation intensity during 2021–2040 and 2071–2100 seem to assist the system in attaining higher reliability. Cost-benefit analysis indicates the financial viability of the proposed system. Finally, we develop a nomograph incorporating interactive factors of RWH, which would ease decision making by the policymakers regarding the implementation of community RWH. |
| Databáze: | OpenAIRE |
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