Droughtmonitoring for the middle reaches of yarlung zangbo river and its two tributaries from satellite images

Lei Zhong, Yaoming Ma, Weiqiang Ma, Zhongbo Su, Xiao Pan, Binbin Wang, Cunbo Han

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


The middle reaches of Yarlung Zangbo River (YR) and its two tributaries (Lhasa River and Nianchu River) is a main agricultural region in central Tibet Autonomous Region. Drought monitoring has significant meaning for local crop growth monitoring, crop yield assessment and disaster monitoring. It also has great theoretical importance for understanding local energy and water balance status. In this paper, MODIS data on 14 April 2003, 16 October 2003 under nearly clear weather conditions are selected as the spring and autumn cases. The land surface parameters, such as land surface temperature (LST), albedo, Normalized Difference Vegetation Index (NDVI), emissivity etc., have been derived from different algorithms for MODIS data. In combination with meteorological data, the drought severity index (DSI) is determined by applying Surface Energy Balance System (SEBS). The estimations show that spring drought is much more severe than autumn drought. The river runoff is the dominant factor for spring drought. The spatial variations of drought conditions in the middle reaches of YR and its two tributaries can also be clearly identified.

Original languageEnglish
Title of host publicationProceedings of the 2008 Dragon symposium, Dragon programme, final results, 2004-2007, Beijing, China 21-25 April 2008.
EditorsH. Lacoste, L. Ouwehand
Place of PublicationParis
PublisherEuropean Space Agency (ESA)
Number of pages6
Volume704 SP
ISBN (Print)978-92-9221-219-3
Publication statusPublished - 1 Dec 2013
EventDragon 2 Final Results and Dragon 3 Kick-Off Symposium - Beijing, China
Duration: 25 Jun 201229 Jun 2012

Publication series

NameEuropean Space Agency, (Special Publication) ESA SP
PublisherEuropean Space Agency
ISSN (Print)0379-6566


ConferenceDragon 2 Final Results and Dragon 3 Kick-Off Symposium


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