Climate Change Study Reveals Sustainable Solution for Water Access in Swat District, Pakistan

Strategic Insights -

Researchers from the University of Engineering and Technology in Peshawar, Pakistan, have conducted a study to propose a sustainable solution for accessing clean water during emergencies, particularly in flood and drought situations. The team analyzed climate change projection data for the Saidu Sharif region of Swat and found that a roof water harvesting system (RWHS) could meet basic drinking water needs during floods and droughts with a high level of satisfaction. The study suggests that for an average drought period of 273 days, a household of seven people would require a storage capacity of 33 cubic meters, while for a maximum drought duration of 325 days, the required storage volume would increase to 39 cubic meters.

Key Takeaways:

  • The study aims to propose a sustainable solution to water access during emergencies, particularly in flood and drought situations, in the Swat district of Pakistan.
  • The region's climate change projection data indicates that excessive rainfall is expected in July, August, and September, while prolonged dry seasons may last between 271 and 325 days annually.
  • The proposed RWHS could meet basic drinking water needs during floods and even during drought periods, with a high level of satisfaction.
  • The key parameters used in the hydrological modeling include catchment area, runoff coefficient, and rainfall intensity.
  • The study suggests that the required storage capacity for a household of seven people with a per capita daily water demand of 17 L would be 33 cubic meters for an average drought period of 273 days.
  • For a maximum drought duration of 325 days, the required storage volume would increase to 39 cubic meters.

Statistics:

  • The study analyzed climate change projection data for the period from 2015 to 2045.
  • Five general circulation models (GCMs) were selected based on their performance in South Asian climate simulations.
  • Analyzed regional forecasted climate data indicates that almost all of the five climate models have predicted periods of excessive rainfall to occur in July, August, and September.
  • The required storage capacity for a household of seven people with a per capita daily water demand of 17 L would be 33 cubic meters for an average drought period of 273 days.
  • The required storage volume would increase to 39 cubic meters for a maximum drought duration of 325 days.

Sources:

  • "Evaluating the Potential of Roof Water Harvesting System for Drinking Water Supplies During Emergencies Under the Impacts of Climate Change: 'A Case Study of Swat District, Pakistan'".
  • Standards, 2025,5(2):11, MDPI AG, https://doi-org.sdpl.idm.oclc.org/10.3390/standards5020011.
  • NewsRx. Data on Climate Change Discussed by Researchers at University of Engineering and Technology (Evaluating the Potential of Roof Water Harvesting System for Drinking Water Supplies During Emergencies Under the Impacts of Climate Change: 'A Case ...). Global Warming Focus. July 7, 2025; p 39.