ItemConference Paper

Evaluating the Impact of Rainwater Harvesting on Urban Runoff Reduction in Bengaluru

Title
Evaluating the Impact of Rainwater Harvesting on Urban Runoff Reduction in Bengaluru
Creator
Pradhan, Arpan; Teena Sojan, V.V.; Sankalp, Sovan; Uppaluri, Sirisha; Mani, Shibu K.; Sahoo, Kirti Kanta
Description
The ground surface changes from undisturbed soils with a natural plant covering to disturbed soils as urbanisation and population pressure increase, amplifying the rapid expansion of impervious surfaces in cities. Without adequate stormwater controls, these impervious surfaces alter the hydrologic cycle by lowering infiltration rates and raising runoff peak flows and volumes. Bengaluru city experiences a more temperate climate throughout the year, and the heavy destruction caused by rains is Indias IT hub. Numerous drains get submerged and saturated after only two days of excessive rain, symbolizing the necessity of harvesting techniques in collecting rainwater and reducing runoff volume. Built-up area dynamics were observed from supervised classification and rainfall data collected from the IMD. Annual collectable rainwater was calculated considering the different cumulative rainfall frequencies, i.e. (25/50/75) %. The overall volume of containers was calculated considering different return periods of (5/10/20) years along with (10/20/30) minute rainfall duration. A 45.7% and 25.8% runoff volume reduction (%) was seen in the study area by considering two cases of maximum daily rainfall and maximum average monthly precipitation, respectively. The calculations indicated a significant capacity for collecting rainwater from impervious surfaces is achievable. The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2026.
Source
Lecture Notes in Civil Engineering;Volume;847 LNCE;pp.167-178
Date
01-01-2026
Publisher
Springer Science and Business Media Deutschland GmbH
Subject
Cistern capacity; Cumulative frequency; Harvesting; Impervious; Runoff volume
Coverage
Pradhan A., Department of Civil Engineering, CHRIST (Deemed to Be University), Karnataka, Bangalore, India; Teena Sojan V.V., Department of Civil Engineering, CHRIST (Deemed to Be University), Karnataka, Bangalore, India; Sankalp S., Gandhi Institute for Education and Technology, Department of Civil, Odisha, Khurda, India; Uppaluri S., Department of Civil Engineering, CHRIST (Deemed to Be University), Karnataka, Bangalore, India; Mani S.K., Department of Civil Engineering, CHRIST (Deemed to Be University), Karnataka, Bangalore, India; Sahoo K.K., School of Civil Engineering, Kalinga Institute of Industrial Technology Deemed to Be University, Bhubaneswar, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 23662557; ISBN: 978-981958835-0;
Format
online
Language
English
Type
Conference paper

Citation

Pradhan, Arpan; Teena Sojan, V.V.; Sankalp, Sovan; Uppaluri, Sirisha; Mani, Shibu K.; Sahoo, Kirti Kanta, “Evaluating the Impact of Rainwater Harvesting on Urban Runoff Reduction in Bengaluru,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/25456.

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