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Research Article Open access CC BY 4.0

Design of Rain Water Harvesting System for Efficient Water Scarcity and Flood Management in India

Sunil Kumar

International Journal of Environment and Climate Change · pp. 295–303 · Published 17 Jun 2024

10.9734/ijecc/2024/v14i64229

Abstract

Areas experiencing extensive floods during the rainy season and water scarcity in winter require efficient water resource management. Economical water-harvesting structures such as drystone masonry and upstream-wall cement masonry, with heights ranging from 1 to 2.5 meters, are constructed for catchments smaller than 10, 10 to 20, and 20 to 30 hectares, respectively, utilizing locally sourced materials. These constructions offer significant cost-effectiveness for the location, boasting a B:C ratio of 3.5:1. In certain areas of Assam, Garh structures are constructed, featuring large and lengthy embankments on both sides with an open central section for water flow. Within paddy fields, the entire area is partitioned into small square segments, creating small embankments known as "Dara." which store rainwater for cultivation. Across the entire Western Himalayan region, encompassing Jammu, Himachal Pradesh, and Northern Uttaranchal, Guhl serves as a standardized water harvesting technique. Notably, in Akola and Chittoor districts, the establishment of farm ponds has significantly boosted crop and livestock productivity, along with farm income. Additional irrigation has notably enhanced the yield of various rainfed crops such as pigeon pea, chickpea, groundnut, cotton, and vegetables, as well as mango and coconut plants, with improvements ranging from 5 to 72%. With the availability of harvested rainwater for supplemental irrigation, farmers have also planted additional fruit trees, resulting in increased productivity of existing fruit trees, such as mango (39%) in Chittoor district and coconut (51%) in Vellore district. Expanding the number of rainwater harvesting structures could potentially reduce runoff within the basin by up to 60%. The implementation of Doha Models, involving percolation tanks dug along the length of lower-order seasonal streams in Jalna district of Maharashtra, has increased cropping intensity from 129% to 132%. Remarkably, five out of seven crops have demonstrated a relatively higher percentage increase in yields. The optimal productivity of harvested water is achieved when efficient application methods such as micro-irrigation are employed, targeting high-value crops.

Watershed management flood protection rain water harvesting supplemental irrigation doha models

References (5)

  1. 1 Rainwater harvesting as an adaptation to climate change
  2. 2 Study on potential uses of rainwater harvesting in urban areas
  3. 3 High salinity in drinking water creating pathways towards chronic poverty: A case study of coastal communities in Tanzania [DOI]
  4. 4 Design of Rainwater Harvesting for a Residential Building in Composite Climate [DOI]
  5. 5 Mobile application design of smart water supply chain based on IoT: A case study in Indonesia [DOI]

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