Analysing biomass fluctuations in Mitchell grassland, Australia, in wet and dry rainy months using MODIS data

Perera, Kithsiri and Apan, Armando (2009) Analysing biomass fluctuations in Mitchell grassland, Australia, in wet and dry rainy months using MODIS data. In: Surveying and Spatial Sciences Institute Biennial International Conference: Spatial Diversity (SSC 2009), 28 Sep-2 Oct 2009, Adelaide, Australia.

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Abstract

The variation in grassland greenery in rainy months is a critical factor for the large farming community in Queensland, Australia. This study examined the changes in plant biomass due to fluctuations in total rainfall during the wet season on Mitchell Grassland in north central Queensland, using MODIS imagery and precipitation records of extreme events. Though NDVI is a well documented tool to observe grassland greenness, its behaviour for fluctuating wet season is worth to analyse. The present research focused on generating descriptive statistics of NDVI values, analysis of profile transects, and pixel-based image differencing of the two extreme rainfall conditions; extremely high and low November to January rainy months. The results indicated that MODIS NDVI data have captured the variation and spatial distribution of green biomass of Mitchell grassland under these two extreme precipitation events. Also the results of the study showed efficient use of NDVI to estimate the greenness or health of the grassland. The approach has a potential to use as a monitoring tool to assess the quality of the grassland, which is important for farming activities of the region. However, further works are needed to study biomass conditions under intermediate precipitation events and over larger area to efficiently link rainfall amounts with NDVI values.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: This publication is copyright. It may be reproduced in whole or in part for the purposes of study, research, or review, but is subject to the inclusion of an acknowledgment of the source.
Depositing User: Dr Kithsiri Perera
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Surveying and Land Information
Date Deposited: 18 Dec 2009 05:46
Last Modified: 27 Oct 2014 23:16
Uncontrolled Keywords: Mitchell grassland; MODIS; NDVI
Fields of Research (FOR2008): 09 Engineering > 0909 Geomatic Engineering > 090905 Photogrammetry and Remote Sensing
05 Environmental Sciences > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity
05 Environmental Sciences > 0502 Environmental Science and Management > 050206 Environmental Monitoring
Socio-Economic Objective (SEO2008): D Environment > 96 Environment > 9608 Flora, Fauna and Biodiversity > 960811 Sparseland, Permanent Grassland and Arid Zone Flora, Fauna and Biodiversity
URI: http://eprints.usq.edu.au/id/eprint/6464

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