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Proceedings Paper

Analysis on causes/evolution of floods over the Songhua main stream basin and the properties of the 1998 deluge over the Song-Nen Plain
Author(s): Nanping Xu; Pinwen Guo; Guihua Zhang; Meiying Yuan; Huasheng Pan
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Paper Abstract

Floods over the main-stream basin of the Songhua River in NE China are characterized by 24 and 3 ~ 4 year periods, and by 4 phases: 1911-1914, 1930-1940, 1954-1958 and 1984-1998. The flooding frequency is increased remarkably as time goes on. The paper is devoted to the direct cause of the flooding due to July ~ August flash rainfall in the Nen River valley and the Second Songhua - Gelin River catchment area, for which the 500 hPa circulation background is studied, that is, the July ~ August anomalous pattern of the Tibetan plateau to Alaska exhibits a "+ - + -" structure, with a blocking high over the Okhotsk Sea and NE China under the control of a trough. In the year of flooding the Aleutian low deepens in the spring, extending westward and the Ural high is established and moves east. The 1998 deluge over the Song-Nen Plain was related broadly to the circulation pattern anomaly and excessive precipitation except that much-more-than-record rainfall occurred in June and August over the Nen River basin.

Paper Details

Date Published: 10 September 2008
PDF: 9 pages
Proc. SPIE 7083, Remote Sensing and Modeling of Ecosystems for Sustainability V, 708316 (10 September 2008); doi: 10.1117/12.794702
Show Author Affiliations
Nanping Xu, Nanjing Univ. of Information Science & Technology (China)
Heilongjiang Meteorological Administration (China)
Pinwen Guo, Nanjing Univ. of Information Science & Technology (China)
Guihua Zhang, Heilongjiang Provincial Meteorological Observatory (China)
Meiying Yuan, Heilongjiang Provincial Meteorological Observatory (China)
Huasheng Pan, Heilongjiang Provincial Meteorological Observatory (China)

Published in SPIE Proceedings Vol. 7083:
Remote Sensing and Modeling of Ecosystems for Sustainability V
Wei Gao; Hao Wang, Editor(s)

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