Open Access Digital Repository of Ministry of Earth Sciences, Government of India

Zonal estimation of probable maximum precipitation rain depths over the Krishna basin in peninsular India

Kulkarni, BD and Nandargi, S and Mulye, SS (2010) Zonal estimation of probable maximum precipitation rain depths over the Krishna basin in peninsular India. Hydrological Sciences Journal, 55 (1). pp. 93-103.

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Estimation of design storm rain depths of probable maximum precipitation (PMP) magnitudes over different zones of the Krishna basin, India, was attempted by using daily rainfall data of about 570 raingauge stations in and around the basin for a 102-year period (1901-2002). By considering the geographical location, orographic features and rainfall characteristics, the entire basin was divided into nine zones. Analysis of severe rainstorms over each zone was carried out and envelope rain depths (standard project storm, SPS, rain depths) over each zone were estimated. These SPS rain depths were then adjusted with moisture maximization factors (MMFs) of respective severe rainstorms to work out the PMP design rain depths. On the basis of available hourly data, average time distribution was also calculated. The study was carried out with the aim of estimating the requisite standard projects storms and probable maximum storms or PMP depths to derive the corresponding design flood estimates. This may serve as a convenient tool for design engineers, in the estimation of design storm rain depths for different sub-basins and the entire Krishna basin while constructing any hydraulic structure connected with irrigation, hydropower generation and flood control in the homogeneous region of the basin.

Item Type: Article
Additional Information: Copyright of this article belongs to Taylor & Francis
Uncontrolled Keywords: Depth-area-duration; Depth-duration; Probable maximum precipitation; Rainstorm; Rainstorm transposition, Design; Estimation; Flood control; Moisture; Optimization; Standards; Thunderstorms, Rain, design flood; precipitation assessment; precipitation intensity; rainfall; raingauge; rainstorm, India; Krishna Basin
Subjects: Meteorology and Climatology
Depositing User: IITM Library
Date Deposited: 28 May 2015 09:05
Last Modified: 28 May 2015 09:05

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