Multisite spatial-temporal rainfall analysis in the onkaparinga catchment using a generalized linear model

M. M. Rashid, S. Beecham, R. K. Chowdhury

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Multisite daily rainfall is an important input in rainfall-runoff modelling. Spatial-temporal rainfall analysis is difficult due to its high variability and non-normal distribution characteristics. Moreover due to these characteristics of rainfall, catchment based daily rainfall analysis using stochastic methods are often used. In this study, we have applied a Generalized Linear Model (GLM) for multisite daily rainfall analysis using occurrence and amount models. Nine rainfall stations were selected within the Onkaparinga catchment in South Australia. NCEP/NCAR reanalysis data and SOI and DMI climate index data were used in addition to observed daily rainfall. The model was fitted and simulated for the calibration period (1991-2010) and validated for the period 1981-1990. Several summary statistics were used to check the performance of the model. The 2.5th and 97.5th percentiles of simulated rainfall were plotted against the statistics of ob-served rainfall. The GLM was able to adequately simulate daily rainfall for use in water resources studies. Moreover, it was concluded that the GLM can be used for downscaling of General Circulation Model (GCM) rainfall projections for the Onkaparinga catchment in South Australia.

Original languageEnglish
Title of host publication9th International Workshop on Precipitation in Urban Areas
Subtitle of host publicationUrban Challenges in Rainfall Analysis, UrbanRain 2012
EditorsPeter Molnar, Paolo Burlando, Thomas Einfalt
PublisherETH Zurich
Pages106-110
Number of pages5
ISBN (Electronic)9783906031217
Publication statusPublished - 2017
Event9th International Workshop on Precipitation in Urban Areas: Urban Challenges in Rainfall Analysis, UrbanRain 2012 - St. Moritz, Switzerland
Duration: Dec 6 2012Dec 9 2012

Publication series

Name9th International Workshop on Precipitation in Urban Areas: Urban Challenges in Rainfall Analysis, UrbanRain 2012

Other

Other9th International Workshop on Precipitation in Urban Areas: Urban Challenges in Rainfall Analysis, UrbanRain 2012
Country/TerritorySwitzerland
CitySt. Moritz
Period12/6/1212/9/12

Keywords

  • Generalized Linear Model
  • Multisite
  • NCEP/NCAR reanalysis data
  • Rainfall modelling

ASJC Scopus subject areas

  • Environmental Engineering

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