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<p>Temperature and rainfall always remain erratic and inconsistent in major parts of the globe. It has led to increase in demand and supply gap of water. To address this issue, analysing rainfall and temperature data and identifying patterns are crucial for better management of water resources. Bhavani is a perennial river of South India which faces hydrological, allocation and perception-wise closure due to climate change. This study looked at the decadal climatology by utilising hydro-metrological series under four different scenarios: past, present, near future and mid future. It utilized the daily rainfall, maximum temperature and minimum temperature data over a century from 1981 to 2080 that were acquired from the NASA Power and CMIP6 database. The extreme climate indices were carried out through Climpact Web Application. Trend and intensity analysis were taken up through statistical approaches such as Mann-Kendall Trend test, Modified Mann-Kendall Test and Innovated Trend Analysis. The study explored that, annual coldest daily maximum temperature and annual warmest daily maximum temperature saw a rise and fall of 2&#xa0;°C, respectively. The 121 days change into tropical nights with more than 20&#xa0;°C of daily minimum temperature. The moderate rainy days with &gt; 7.6&#xa0;mm in North East monsoon projected as very high in the decade 2031–2040. The 2031–2040 decade needed much attention because it was projected as extreme drought situation and increase of NE monsoon rainfall. In order to maintain sustainability, policy makers can develop a decadal plan for managing water resources over the BRB based on those important results.</p>

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Exploring the temporal dynamics of extreme weather events in the river basin

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Ponnuchakkammal P ,
  • Raviraj A,
  • Suresh Kumar D,
  • Balaji Kannan,
  • Sumathi S C,
  • Boomiraj K,
  • Arunadevi K,
  • Vishnu Shankar S

摘要

Temperature and rainfall always remain erratic and inconsistent in major parts of the globe. It has led to increase in demand and supply gap of water. To address this issue, analysing rainfall and temperature data and identifying patterns are crucial for better management of water resources. Bhavani is a perennial river of South India which faces hydrological, allocation and perception-wise closure due to climate change. This study looked at the decadal climatology by utilising hydro-metrological series under four different scenarios: past, present, near future and mid future. It utilized the daily rainfall, maximum temperature and minimum temperature data over a century from 1981 to 2080 that were acquired from the NASA Power and CMIP6 database. The extreme climate indices were carried out through Climpact Web Application. Trend and intensity analysis were taken up through statistical approaches such as Mann-Kendall Trend test, Modified Mann-Kendall Test and Innovated Trend Analysis. The study explored that, annual coldest daily maximum temperature and annual warmest daily maximum temperature saw a rise and fall of 2 °C, respectively. The 121 days change into tropical nights with more than 20 °C of daily minimum temperature. The moderate rainy days with > 7.6 mm in North East monsoon projected as very high in the decade 2031–2040. The 2031–2040 decade needed much attention because it was projected as extreme drought situation and increase of NE monsoon rainfall. In order to maintain sustainability, policy makers can develop a decadal plan for managing water resources over the BRB based on those important results.