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<p>This article provides a comprehensive analysis of the meteorological droughts that have occurred in the Indian River Basin (IRB) over the last century. It emphasizes the complex and unpredictable nature of weather fluctuations and explores their consequences for the management of drought. This research initiative aims to analyze the temporal and spatial characteristics of meteorological droughts in the IRB from 1903 to 2022. Extreme weather is becoming increasingly common because of climatic change on a worldwide scale. Because of the significant changes in the past few decades, the time series modeling and change point recognition in meteorological droughts are now essential areas of research. Accurate spatiotemporal drought evaluation using drought indices is crucial. To investigate meteorological drought trends, Mann-Kendall’s Trend (MKT) and Mutation (MKM) tests have been used. The MKT test method is used to evaluate the trend of meteorological drought, and the MKM test is used to identify the year of change, by utilizing the Standardized Precipitation Index (SPI) on monthly time scales for the major river basins of IRB. Through the investigation, it has been discovered that there has been a recurring pattern of floods and droughts in IRB over the last 120 years. There is a noticeable variation in the rate of change across different locations, with substantial variations over time and space in regions of the same river basins that have different climates. There are distinct patterns that emerge in both wet and dry regions, experiencing a noticeable upward trend during the dry seasons. IRB has observed a significant trend of increased intensity in meteorological droughts, particularly in the basins of Barak, Mahanadi, Indus, South Tapi, Ganga, and Brahmaputra Rivers. Drought character in these basins has changed due to anthropogenic activities and climate change, decreasing resilience year after year. The findings of this study provide a framework for further investigation into drought conditions in different regions worldwide. Under changing climates, the study establishes a scientific foundation for drought management strategy.</p>

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Investigation of spatiotemporal changes of drought trend in Indian River Basin system over the century

  • 期刊论文

  • 发表日期：

    2025年1月13日

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  • Preeti Rajput,
  • Mukesh Kumar Verma,
  • Nikhil Ghodichore,
  • Manish Kumar Sinha

摘要

This article provides a comprehensive analysis of the meteorological droughts that have occurred in the Indian River Basin (IRB) over the last century. It emphasizes the complex and unpredictable nature of weather fluctuations and explores their consequences for the management of drought. This research initiative aims to analyze the temporal and spatial characteristics of meteorological droughts in the IRB from 1903 to 2022. Extreme weather is becoming increasingly common because of climatic change on a worldwide scale. Because of the significant changes in the past few decades, the time series modeling and change point recognition in meteorological droughts are now essential areas of research. Accurate spatiotemporal drought evaluation using drought indices is crucial. To investigate meteorological drought trends, Mann-Kendall’s Trend (MKT) and Mutation (MKM) tests have been used. The MKT test method is used to evaluate the trend of meteorological drought, and the MKM test is used to identify the year of change, by utilizing the Standardized Precipitation Index (SPI) on monthly time scales for the major river basins of IRB. Through the investigation, it has been discovered that there has been a recurring pattern of floods and droughts in IRB over the last 120 years. There is a noticeable variation in the rate of change across different locations, with substantial variations over time and space in regions of the same river basins that have different climates. There are distinct patterns that emerge in both wet and dry regions, experiencing a noticeable upward trend during the dry seasons. IRB has observed a significant trend of increased intensity in meteorological droughts, particularly in the basins of Barak, Mahanadi, Indus, South Tapi, Ganga, and Brahmaputra Rivers. Drought character in these basins has changed due to anthropogenic activities and climate change, decreasing resilience year after year. The findings of this study provide a framework for further investigation into drought conditions in different regions worldwide. Under changing climates, the study establishes a scientific foundation for drought management strategy.