ANALYSIS OF DROUGHT IN EASTERN PART OF BANGLADESH

Abstract

Analysis of drought is very important for the irrigation purpose of a country. In this work analysis of drought in the eastern part of Bangladesh has been studied. Yearly meteorological drought has been analyzed by comparing the yearly rainfall deficiency with the mean yearly rainfall. Yearly drought analysis has also been performed by three climatic indexes. The climatic indexes are De Mortone Aridity Index, IdM; Seleaninov Hydrothermic Index, IhS; and Donciu Climate Index, IcD. With the help of annual rainfall assurance (A%) yearly drought analysis has been performed by the climatic indexes. Monthly drought analysis has been done with the rainfall data, considering average rainfall and minimum rainfall for a month. In this study 17 meteorological stations have been chosen for analysis. Distribution of rainfall, annual variation of rainfall, yearly drought and percentage of drought affected areas has been presented with the help of different figures and tables. Monthly drought analysis shows that generally the month of January, February, March, November and December are drought affected. The month of April faces drought almost every year. May and October face drought occasionally. The months June, July, August and September experience heavy rainfall.