Copula-based multivariate analysis of hydrological drought over jiabharali sub-basin of Brahmaputra River, India.

ABSTRACT: In this study, copula-based multivariate hydrological drought analysis was carried out in the Jiabharali (Kameng) River in Arunachal Pradesh, a sub-tributary of Brahmaputra River, India. Different drought characteristics - severity (S), duration (D), and inter-arrival (I) time were estimated, to evaluate their joint probability drought occurrences. The multi-time streamflow drought indices (3, 6, 9, and 12-months) were calculated by using total monthly discharge of Bhalukpong station, Jiabharali River from 2000 to 2023. The highest value of hydrological drought severity was observed at a longer time scale in the SDIn12 (SDIn9) months of magnitude - 87.75 (-83.8) that lasted for 71 (63) months. Different marginal probability distribution functions (PDFs) and copula families (Elliptical and

SUBMITTER: Chakma B 

PROVIDER: S-EPMC12756259 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature