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Drought sensitivity mapping using two one-class support vector machine algorithms

Citation

Roodposhti, MS and Safarrad, T and Shahabi, H, Drought sensitivity mapping using two one-class support vector machine algorithms, Atmospheric Research, 193 pp. 73-82. ISSN 0169-8095 (2017) [Refereed Article]

Copyright Statement

2017 Elsevier B.V. All rights reserved.

DOI: doi:10.1016/j.atmosres.2017.04.017

Abstract

This paper investigates the use of standardised precipitation index (SPI) and the enhanced vegetation index (EVI) as indicators of soil moisture. On the other hand, we attempted to produce a drought sensitivity map (DSM) for vegetation cover using two one-class support vector machine (OC-SVM) algorithms. In order to achieve promising results a combination of both 30years statistical data (1978 to 2008) of synoptic stations and 10years MODIS imagery archive (2001 to 2010) are used within the boundary of Kermanshah province, Iran. The synoptic data and MODIS imagery were used for extraction of SPI and EVI, respectively. The objective is, therefore, to explore meaningful changes of vegetation in response to drought anomalies, in the first step, and further extraction of reliable spatio-temporal patterns of drought sensitivity using efficient classification technique and spatial criteria, in the next step. To this end, four main criteria including elevation, slope, aspect and geomorphic classes are considered for DSM using two OC-SVM algorithms. Results of the analysis showed distinct spatio-temporal patterns of drought impacts on vegetation cover. The receiver operating characteristics (ROC) curves for the proposed DSM was used along with the simple overlay technique for accuracy assessment phase and the area under curve (AUC=0.80) value was calculated.

Item Details

Item Type:Refereed Article
Keywords:drought sensitivity map (DSM), enhanced vegetation index (EVI), kermanshah, one-class support vector machine (OC-SVM), standardised precipitation index (SPI)
Research Division:Engineering
Research Group:Geomatic Engineering
Research Field:Photogrammetry and Remote Sensing
Objective Division:Environment
Objective Group:Land and Water Management
Objective Field:Land and Water Management of environments not elsewhere classified
Author:Roodposhti, MS (Mr Majid Roodposhti)
ID Code:120159
Year Published:2017
Deposited By:Geography and Spatial Science
Deposited On:2017-08-11
Last Modified:2017-09-18
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