This paper makes use of the monthly natural runoff data from1956 to 2000, the monthly
air temperature data and precipitation data from 1956 to 2004 to analyze the evolution
characteristics of the runoff in the Yarlung Zangbo River basin in the later half of the 20th
century and the relation between runoff evolution and climatic change.The results show that the
interannual evolution of the runoff in the Yarlung Zangbo River basin is stable, but the intraannual
distribution of the runoff is extremely uneven, the maximum monthly runoff accounts for
30.1%, while the minimum runoff only accounts for 2.1%, and indication of the great difference
in the runoff between low water season and flood water season.The climate in the Yarlung
Zangbo River basin is calefactive, and the increasing trend of the precipitation is obvious, having
the same evolution periods with runoff.After elementary analysis of the decadal runoff in the
Yarlung Zangbo River basin, we found that the increase of the water supply is mainly controlled
by climate change, but is also affected by the changes of the earth surface conditions in the
basin and maybe a representation of the long period of variation of high and low stream flow.
Relevant data are required to validate and analyze this kind of periodic variations.
LIU Jian1, 2, YAO Zhi-jun1, CHEN Chuan-you1
. Evolution Tr end and Causation Analysis of the Runoff Evolution in the Yar lung Zangbo River Basin[J]. JOURNAL OF NATURAL RESOURCES, 2007
, 22(3)
: 471
-477
.
DOI: 10.11849/zrzyxb.2007.03.017
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