PROBABILITY MODELING OF LOW FLOWS AT DIFFERENT SITES OF INDUS BASIN IN PAKISTAN USING L-MOMENTS AND TL-MOMENTS

At-site Frequency Analysis (ASFA) of low flow was carried out for nine sites ofIndus basin in Pakistan. In the present study, 10-day annual series were analyzed by robustestimation methods such as Method L-moment (ML) and TL-moment (MTL) to identify best fitprobability distributions each site. Best distribution site identified using differentgoodness-of-fit Tests (GFT). No single probability declared best-fit distributionfor all included plan. The GFT results indicated GPA most appropriate followed GLO GEV distributions. On comparison, it found that formost ML estimation method others MTL. For ASFA, quantiles bestfit also estimated. It estimated flows based on fitted distributionwere close agreement with observed flows.