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Open AccessArticle

Assessment of the Biomass Productivity Decline in the Lower Mekong Basin

1
Soils and Fertilizers Research Institute (SFRI), Duc Thang, Bac Tu Liem, 11910 Hanoi, Vietnam
2
Department of Engineering Systems and Environment, University of Virginia Charlottesville VA 22904, USA
3
Hydrological Sciences Lab, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(23), 2796; https://doi.org/10.3390/rs11232796
Received: 3 October 2019 / Revised: 30 October 2019 / Accepted: 22 November 2019 / Published: 26 November 2019
(This article belongs to the Special Issue Monitoring Vegetation Phenology: Trends and Anomalies)
This study aimed to delineate the geographic hotspots of negative trends in biomass productivity in the Lower Mekong Basin countries (Vietnam, Cambodia, Laos, and Thailand) and identify correlated regional environmental and anthropogenic factors. A long-term time-series (1982–2015) of Normalized Difference Vegetation Index at a resolution of approximately 9.16 km × 9.16 km was used to specify the areas with significant decline or increase in productivity. The relationships between vegetation changes and land attributes, such as climate, population density, soil/terrain conditions, and land-cover types, were examined. Rainfall time-series maps were used to identify areas that might have been affected by land degradation from those correlated with rainfall. Most of the detected potentially degraded areas were found in Cambodia, the Northwest and the Highland of Vietnam, the Northern Mountains of Thailand and Laos, and the mountainous border between Laos, Vietnam, and Cambodia. About 15% of the total land area of these four countries experienced a reduction in biomass productivity during the 34-year study period. The map of hotspots of changes in productivity can be used to direct further studies, including those at finer spatial resolution that may support policy makers and researchers in targeting the strategies for combating land degradation. View Full-Text
Keywords: land degradation; NDVI; spatiotemporal analysis; climate; Lower Mekong Basin land degradation; NDVI; spatiotemporal analysis; climate; Lower Mekong Basin
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MDPI and ACS Style

Vu, Q.M.; Lakshmi, V.; Bolten, J. Assessment of the Biomass Productivity Decline in the Lower Mekong Basin. Remote Sens. 2019, 11, 2796.

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