Dey, Pankaj and Mujumdar, P P (2019) On the uniformity of rainfall distribution over India. In: JOURNAL OF HYDROLOGY, 578 .
![]() |
PDF
Jou_Hyd_578.pdf - Published Version Restricted to Registered users only Download (11MB) | Request a copy |
![]() |
PDF
supplementary rain fall.docx - Published Supplemental Material Restricted to Registered users only Download (2MB) | Request a copy |
Abstract
Understanding response of temporal distribution, timing, frequency and amount of high and low intensity rainfall to warming is important in water resources management. In this paper, Relative Entropy is used to investigate the spatial variability and change in uniformity of rainfall distribution over India. Temporal trends in atmospheric temperature can alter the frequency and amount of high and low intensity rainfall events, which influence the uniformity of rainfall distribution. The study is divided into two time periods, 1951-1980 and 1981-2010 based on time trend in annual mean temperature. The sensitivity of rainfall uniformity and high and low intensity rainfall events to annual mean temperature and the degree of coherence between them are investigated. The uniformity of rainfall distribution shows a significant spatial variability. Significant changes are observed in both the amount and timing of rainfall across India. A significant association between rainfall uniformity and low intensity of rainfall is observed in the recent past over a larger aerial extent compared to the distant past. It is concluded that rise in temperature modifies both high and low intensity rainfall events, thus altering the uniformity in rainfall distribution. A regionally varied strength of coherence between rainfall uniformity and high and low intensity rainfall is observed which may be due to regionally dependent soil moisture-precipitation feedbacks.
Item Type: | Journal Article |
---|---|
Publication: | JOURNAL OF HYDROLOGY |
Publisher: | ELSEVIER |
Additional Information: | Copyright of this article belongs to ELSEVIER |
Keywords: | Relative entropy; Rainfall uniformity; Temperature trend; India |
Department/Centre: | Division of Mechanical Sciences > Civil Engineering |
Date Deposited: | 14 Jan 2020 09:39 |
Last Modified: | 14 Jan 2020 09:39 |
URI: | http://eprints.iisc.ac.in/id/eprint/64062 |
Actions (login required)
![]() |
View Item |