Variations in meteorological floods during summer monsoon over India
DOI:
https://doi.org/10.54302/mausam.v42i2.3075Keywords:
Auto-correlation, depressions, quasi-biennia1 oscillations, red-noise, El-Nin9, La-Nina, power spectrum analysis.Abstract
In this study, rainfall data of 31 mteorological sub-divisioins in India for 113 years (1875-1987) have been used to develop a flood index and statistical properties of the Index are discussed. Relationship of the index with the seasonal rainfall, number of depressions and El-N/no phenomenon are examined.
The study revealed that 1971-80 decade, had more number of flood years than the drought years. The flood index was found to be significantly related to flood situation over India. It IS difficult to associate any particular phase of the quasi-biennial oscillations (QBO) with occurrence of floods.
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