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Periodical article Periodical article Leiden University catalogue Leiden University catalogue WorldCat catalogue WorldCat
Title:Normalized difference vegetation index and standard precipitation index parameters to monitor drought at national scale: the case of Ethiopia
Editor:Berhan, Getachew
Year:2012
Periodical:Ethiopian Journal of Development Research (ISSN 0378-0813)
Volume:34
Issue:1
Pages:67-94
Language:English
Geographic term:Ethiopia
Subjects:rain
droughts
remote sensing
Abstract:The main objective of this research was to characterize and identify drought incidence using both historic rainfall (RF) data and satellite-images. Based on historic RF data, four different patterns were identified. The first pattern has high average RF during July and August. In this pattern, the rain starts in March with gradual increase and reaches the maximum in July and August. The second pattern has high average RF during July and August and a secondary RF during March, April and May with highest average RF in April. The third pattern has high average RF during April and May and a secondary RF during September, October and November with highest average RF in April. The fourth pattern has RF throughout the year with relatively low average RF during December, January and February. Data from satellite sources were analyzed and compared with the historical RF records in forty stations, whereby the RF records were used as control parameters for the satellite source data. Based on this study, it is possible, with some calibration and validation, to identify and predict drought incidence in advance so that appropriate action to mitigate the adverse effects of drought can be taken. App., bibliogr., sum. [ASC Leiden abstract]
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