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| Titel |
Investigation of correlation of the variations in land subsidence (detected by continuous GPS measurements) and methodological data in the surrounding areas of Lake Urmia |
| VerfasserIn |
K. Moghtased-Azar, A. Mirzaei, H. R. Nankali, F. Tavakoli |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 19, no. 6 ; Nr. 19, no. 6 (2012-11-30), S.675-683 |
| Datensatznummer |
250014266
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| Publikation (Nr.) |
 copernicus.org/npg-19-675-2012.pdf |
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| Zusammenfassung |
| Lake Urmia, a salt lake in the north-west of Iran, plays a valuable role in
the environment, wildlife and economy of Iran and the region, but now faces
great challenges for survival. The Lake is in immediate and great danger and
is rapidly going to become barren desert. As a result, the increasing demands
upon groundwater resources due to expanding metropolitan and agricultural
areas are a serious challenge in the surrounding regions of Lake Urmia. The
continuous GPS measurements around the lake illustrate significant subsidence
rate between 2005 and 2009. The objective of this study was to detect and
specify the non-linear correlation of land subsidence and temperature
activities in the region from 2005 to 2009. For this purpose, the cross
wavelet transform (XWT) was carried out between the two types of time series,
namely vertical components of GPS measurements and daily temperature time
series. The significant common patterns are illustrated in the high period
bands from 180–218 days band (~6–7 months) from September 2007 to
February 2009. Consequently, the satellite altimetry data confirmed that the
maximum rate of linear trend of water variation in the lake from 2005 to
2009, is associated with time interval from September 2007 to February 2009.
This event was detected by XWT as a critical interval to be holding the
strong correlation between the land subsidence phenomena and surface
temperature. Eventually the analysis can be used for modeling and prediction
purposes and probably stave off the damage from subsidence phenomena. |
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