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Assessing Long-Term Trends In Vegetation Productivity Change Over the Bani River Basin in Mali (West Africa)

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Relation http://oar.icrisat.org/8571/
http://dx.doi.org/10.15640/jges.v2n2a2
 
Title Assessing Long-Term Trends In Vegetation Productivity Change Over the Bani River Basin in Mali (West Africa)
 
Creator Traore, S S
Landmann, T
Forkuo, E K
Traore, P C S
 
Subject Agriculture-Farming, Production, Technology, Economics
 
Description Using time series of Normalized Difference Vegetation Index (NDVI) and rainfall
data, we investigated historical vegetation productivity trends from 1982 to 2011
over the Bani River Basin in Mali. Statistical agreements between long-term trends
in vegetation productivty, corresponding rainfall and rate of land cover change from
Landsat time-series imagery was used to discern climate versus human-induced
vegetation cover change. Spearman correlation was used to investigate the
relationship between metrics of vegetation, rainfall trends and land cover change
categories. The results show there is a positive correlation between increases in
rainfall and some land cover classes, while some classes such as settlements were
negatively correlated with vegetation productivity trends. Croplands and Natural
Vegetation were positively correlated (r=0.89) with rainfall while settlements have a
negative correlation with NDVI time series trend (r=-057). Despite the fact that
rainfall is the major determinant of vegetation cover dynamics in the study area, it
appears that other human-induced factors such as urbanization have negatively
influenced the change in vegetation cover in the study area. The results show that a
combined analysis of NDVI, rainfall and spatially explicit land cover change
provides a comprehensive insight into the drivers of vegetation cover change in
semi-arid Africa.
 
Publisher American Research Institute for Policy Development
 
Date 2014-12
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/8571/1/2.pdf
Traore, S S and Landmann, T and Forkuo, E K and Traore, P C S (2014) Assessing Long-Term Trends In Vegetation Productivity Change Over the Bani River Basin in Mali (West Africa). Journal of Geography and Earth Sciences, 2 (2). ISSN 2334-2455