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| Titel |
Changes in streamflow and sediment discharge and the response to human activities in the middle reaches of the Yellow River |
| VerfasserIn |
P. Gao, X.-M. Mu, F. Wang, R. Li |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 1 ; Nr. 15, no. 1 (2011-01-03), S.1-10 |
| Datensatznummer |
250012581
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| Publikation (Nr.) |
 copernicus.org/hess-15-1-2011.pdf |
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| Zusammenfassung |
| The changes in streamflow and sediment discharge in the middle reaches of
the Yellow River are a focus. In this paper, based on the precipitation,
streamflow and sediment discharge series data (1950–2008), the streamflow
and sediment discharge variation and its impact on precipitation/response
to human activities have been analysis. The results show that significant
decreasing trends in annual streamflow and sediment discharge have existed
since the late 1950s in the middle reaches of the Yellow River (P = 0.01).
Change-point analyses further revealed that transition years existed and
that abrupt decline in streamflow and sediment discharge began in 1985 and
1981, respectively, in the middle reaches of the Yellow River (P = 0.05).
Adoption of conservation measures in the 1980s and 1990s corroborates the
identified transition years. Double-mass curves of precipitation vs.
streamflow (sediment) for the periods before and after the transition year
show remarkable decreases in proportionality of streamflow (sediment)
generation. Compared with the period before the transition year, cumulative
streamflow and cumulative sediment discharge reduced respectively by
17.8% and 28% during 1985–2008, which was caused by human
intervention, in the middle reaches of the Yellow River. It is, therefore,
concluded that human activities occupied a dominant position and played a
major role in the streamflow and sediment discharge reduction in the middle
reaches of the Yellow River. |
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