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Papers by Akhtar Ali
The study was conducted to assess the performance of drip irrigation systems installed at Charsad... more The study was conducted to assess the performance of drip irrigation systems installed at Charsadda, Malakand Agency and Nowshera. The performance parameters of the drip irrigation system included the coefficient of variation of emitters flow rate with respect to design of manufacturer, hydraulics, plugging were compared with physical need based CROPWAT software estimation were evaluated. The emitters discharge was collected at the beginning, 1/3 down, 2/3 down and end of each selected lateral by volumetric method. The soil texture and infiltration data was also determined for the efficiency and adequacy of drip irrigation system. The head loss along the laterals was determined for uniformity of the drip irrigation system. These collected values were averaged for each plot and water requirement was determined by using CROPWAT computer software. Results of the study revealed that the head loss in Malakand Agency (0.6 m) irrigation systems remained uniform while these are varying in N...
Journal of Water and Climate Change, 2022
This study proposes the assessment of SWAT model simulations, with the provision of satellite pre... more This study proposes the assessment of SWAT model simulations, with the provision of satellite precipitation products (SPPs), in a transboundary/large catchment. Three latest sub-daily/half-hourly (HH) and daily (D) SPPs, i.e., ‘IMERG-E’, ‘IMERG-L’, and ‘IMERG-F’, were evaluated for daily and monthly flow simulations. The study revealed that monthly flow simulation performance is better than daily flow simulation in all sub-daily and daily SPPs-based models. Results depict that IMERG-HHF and IMERG-DF yield the best performance among the other latency levels of SPPs. The IMERG-HHF model has a reasonably higher daily correlation coefficient (R) and lower daily root-mean-square error (RMSE) than IMERG-DF. IMERG-HHF displays the lowest percent bias (PBIAS) values of 15.4 and 2.4 for daily and monthly flow validation, respectively. It also represents relatively higher values of coefficient of determination (R2) and Nash–Sutcliffe Efficiency (NSE) than any other model, i.e., R2=0.66 and NS...
Journal of Water Resource and Protection, 2012
The study was conducted to assess the performance of drip irrigation systems installed at Charsad... more The study was conducted to assess the performance of drip irrigation systems installed at Charsadda, Malakand Agency and Nowshera. The performance parameters of the drip irrigation system included the coefficient of variation of emitters flow rate with respect to design of manufacturer, hydraulics, plugging were compared with physical need based CROPWAT software estimation were evaluated. The emitters discharge was collected at the beginning, 1/3 down, 2/3 down and end of each selected lateral by volumetric method. The soil texture and infiltration data was also determined for the efficiency and adequacy of drip irrigation system. The head loss along the laterals was determined for uniformity of the drip irrigation system. These collected values were averaged for each plot and water requirement was determined by using CROPWAT computer software. Results of the study revealed that the head loss in Malakand Agency (0.6 m) irrigation systems remained uniform while these are varying in N...
Journal of Water and Climate Change, 2022
This study proposes the assessment of SWAT model simulations, with the provision of satellite pre... more This study proposes the assessment of SWAT model simulations, with the provision of satellite precipitation products (SPPs), in a transboundary/large catchment. Three latest sub-daily/half-hourly (HH) and daily (D) SPPs, i.e., ‘IMERG-E’, ‘IMERG-L’, and ‘IMERG-F’, were evaluated for daily and monthly flow simulations. The study revealed that monthly flow simulation performance is better than daily flow simulation in all sub-daily and daily SPPs-based models. Results depict that IMERG-HHF and IMERG-DF yield the best performance among the other latency levels of SPPs. The IMERG-HHF model has a reasonably higher daily correlation coefficient (R) and lower daily root-mean-square error (RMSE) than IMERG-DF. IMERG-HHF displays the lowest percent bias (PBIAS) values of 15.4 and 2.4 for daily and monthly flow validation, respectively. It also represents relatively higher values of coefficient of determination (R2) and Nash–Sutcliffe Efficiency (NSE) than any other model, i.e., R2=0.66 and NS...
Journal of Water Resource and Protection, 2012