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| Titel |
Effects of water discharge and sediment load on evolution of modern Yellow River Delta, China, over the period from 1976 to 2009 |
| VerfasserIn |
J. Yu, Y. Fu, Y. Li, G. Han, Y. Wang, D. Zhou, W. Sun, Y. Gao, F. X. Meixner |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 9 ; Nr. 8, no. 9 (2011-09-05), S.2427-2435 |
| Datensatznummer |
250006111
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| Publikation (Nr.) |
 copernicus.org/bg-8-2427-2011.pdf |
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| Zusammenfassung |
| The Yellow River, which is the second largest river in China, is
regarded as the world's largest contributor of fluvial sediment load to the
ocean. In recent decades, the dramatic reduction in water discharge and
sediment load due to climate change and human activities in the drainage
basin has greatly constrained the evolution process of Yellow River delta.
We highlight how runoff and sediment load discharged into sea affected
extension of shoreline length and area of modern Yellow River delta during
1976–2009 based on remote sensing interpretation and long-term monitoring
data in hydrological station. Average runoff of 207.47 × 108 m3 yr−1
and average sediment load of 4.63 × 108 m3 yr−1
were discharged into the sea from 1976 to 2008.
The annual runoff reduced by ~59.7 % in 1990–2002 and annual sediment
load reduction up to ~72.1 % in 2003–2008. Both shoreline length and
area of Yellow River Delta extended overall in the studied period, but with
decreasing rates in accordance with changes of runoff and sediment load.
High increasing rate of shoreline length of ~3.63 km yr−1 and
quick area extension of ~16.26 km2 yr−1 were observed in
1976–1985. Since 1996 however, the average increase rate of shoreline length
and area decreased to ~0.80 km yr−1 and ~3.94 km2 yr−1,
respectively. In addition, the fluctuated changes of shoreline
and area were great and the net negative increase of land area was occurred
during this period. There exist significant exponential relationships
between the accumulated sediment load and extensions of shoreline length and
the area during the evolution of the modern Yellow River Delta. Our results
indicate that the evolution of shoreline and change of area of the Yellow
River Delta are directly affected by the dramatic reduction of runoff and
sediment load, which are much close related human being activities in Yellow
River drainage basin in recent decades. |
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