Hydrology: Current Research

Gul Daraz Khan

Publications

• Research Article
  Win TR-20 Application Using Statistical Approaches for Long Term Prediction of Peak Runoff Rates in Smaller Watersheds of Pakistan
  Author(s): Jan Muhammad and Gul Daraz KhanJan Muhammad and Gul Daraz Khan
  
  Calibrated Win TR-20 model was validated and simulated to predict the peak runoff rates for 2, 5, 10, 25, 50 and 100 years for a small watershed area of 72 km2 in the southern region of Khyber Pakhtunkhwa of Pakistan. The catchment has a gauged spillway outlet at the downstream. The model was initially calibrated on the available known parameters from the grid survey and its derivatives, watershed physical features and other scales endorsed into the reservoir for monitoring. The calibrated model was tested and validated on physical data collected for duration of three months with a coefficient of determination of 98% among the observed and estimated runoff depths and peak runoff. After confirmation log-Pearson type III distribution was fitted to annual one day maximum rainfall upon which one day maximum rainfalls for 2, 5, 10, 25, 50 and 100 years return periods were simulated as 50, .. Read More»
  DOI: 10.4172/2157-7587.1000192

  Abstract PDF