Spatiotemporal analysis of extreme rainfall events using an object-based approach

Miguel Laverde-Barajas, Gerald Corzo, Biswa Bhattacharya, Remko Uijlenhoet, Dimitri Solomatine

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review

3 Citations (Scopus)

Abstract

This research presents a spatiotemporal object-based method for the identification and evaluation of extreme rainfall events at catchment scale using satellite products. Extreme rainfall events are defined as connected rainfall fields in space and time, with a relatively high statistical volume of water. This method provides a complete diagnosis of extreme events identifying the structure of rainfall events. A multidimensional connected-component labeling algorithm is used to associate (cluster) convective rainfall events, and with this create a 4D rainfall object. The main characteristics of rainfall extreme events are determined by rainfall objects extracted from the clusters, such as volume, area, duration, orientation, and speed, among others. The methodology is applied to the subtropical catchment of the Tiete River for the identification and classification of different types of extreme events during monsoon seasons and the verification of a near-real time satellite-based product. Results show the importance of spatial and temporal structures in the comparison of products and real-life events. This method also provides insights to better understand the rainfall concentration (location) of events and their dynamics over catchments.

Original languageEnglish
Title of host publicationSpatiotemporal Analysis of Extreme Hydrological Events
PublisherElsevier
Chapter5
Pages95-112
Number of pages18
ISBN (Electronic)9780128116890
ISBN (Print)9780128117316
DOIs
Publication statusPublished - 11 Jan 2019

Keywords

  • Connected-component labeling algorithm
  • Extreme rainfall events
  • Multidimensional rainfall analysis
  • Rainfall object-based methods
  • Satellite-based rainfall products
  • Spatiotemporal analysis

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