Trends Analysis of Hydrometeorological data for Buner Basin, Khyber Pakhtunkhwa, Pakistan
Keywords:
Hydrometeorological varaibles; Seasons; Climate change; Parametric and non-parametric tests; Trend analysis; Significant change.Abstract
Assessing trends of hydrometeorological variables is necessary for climate change modeling, accurate
water resources management and improved regional planning. This study investigated the seasonal, annual,
maximum (max.) and mean rainfall trend using data from 1986 to 2013 collected from three selected gauge
stations including Tarbela, Daggar and Saidu sharif. Similarly, the historic data (1986 to 2013) of flow of
Brandu river and max. and minimum (min.) temperature of Tarbela and Saidu Sharif gauge station were
analysed. To identify trends for the hydrometeorological parameters, both non-parametric and parametric
(MK) tests were applied at 10% significant level. The study concludes, a mixture of increasing and decreasing
trends. Annual max. rainfall exhibited an increasing trend in the study area. Similarly, total annual and mean
annual rainfall for Daggar and Saidu Sharif gauge stations showed decreasing trend while Tarbela gauge
station exhibited an increasing trend. Statistically significant trends were found for annual total rainfall (
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