Regional Frequency Analysis Using L-Moment Methodology—A Review

In order to carry out hydrological and climatological characteristics of a region that is far apart or completely isolated which goes away from the gauging network, and on other hand it becomes a part of watershed or catchment area under consideration for the purpose of any hydraulic structure analysis. This can be resolved by means of regionalization technique using some statistical methods. Different techniques together with L-moments introduced by Hosking and Wallis [24] are being utilized by many researchers and hydrologists in their research work. The researchers have applied the L-Moment methodology to almost every extreme event, viz., extreme rainfall, low flow, flood and drought. The regionalization or RFA tends to compensate for the lack of data for ungauged watershed or catchments. The purpose of this paper is to describe regionalization procedure for hydrological and climatological assessment of ungauged watershed.