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Site-Specific Detections of Hydroclimatic Changes for Naran Watershed, Pakistan

  • Research Article - Civil Engineering
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Abstract

In this paper, studies have been made to detect the changes in key hydroclimatic variables including precipitation, surface-air temperatures and stream flow with their trends, constructed projection scenarios, and simulated projected climate parameters for Naran watershed. Extreme indices have been determined by least squares and weighted average regression analysis. Temperature extremes have indicated signs of warming trends and increase in variability. Precipitation extremes have depicted decrease in occurrences and magnitudes. The analysis has provided evidence of high confidence about these changes. Trends of from hydroclimatic parameters and stream flows were also determined using Mann–Kendall test for the period 1962–2011. Inter-annual trends have been detected to determine the sensitivity with a base period (1962–1991) by using equal and unequal overlapped moving periods. It has been found that there is a clear trend reversibility during 1996–1997 for temperatures and precipitation pattern. However, the analysis has revealed that no long-term trends are persistent in inter-annual surface-air temperatures and precipitation. Intra-annual trends and variations on the monthly scale from data sets of 1962–2011 have also been detected with their significant values. There seems evidence that variation of parameters in monthly scale is occurring that is affecting the ice melt schedule and evapotranspiration demand.

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Authors and Affiliations

  1. Centre of Excellence in Water Resource Engineering (CEWRE), University of Engineering and Technology (UET), Lahore, Pakistan

    Farooq Azim & Ghulam Nabi

  2. Faculty of Civil Engineering, University of Engineering and Technology, Lahore, Pakistan

    Abdul Sattar Shakir

  3. Department of Civil Engineering, University of Engineering and Technology, Lahore, Pakistan

    Habib Rehman

Authors
  1. Farooq Azim
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  2. Abdul Sattar Shakir
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  3. Habib Rehman
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  4. Ghulam Nabi
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Correspondence to Farooq Azim.

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Azim, F., Shakir, A.S., Rehman, H. et al. Site-Specific Detections of Hydroclimatic Changes for Naran Watershed, Pakistan. Arab J Sci Eng 40, 693–704 (2015). https://doi.org/10.1007/s13369-014-1555-z

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  • DOI: https://doi.org/10.1007/s13369-014-1555-z

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