Erosion effects assessed by repeated gravity measurements in southern Taiwan
Artikel i vetenskaplig tidskrift, 2013

We analyse temporal variations of gravity measured in southern Taiwan since November 2006 at 10 sites using absolute gravimeters and, since November 2008, at 70 sites using a relative gravimeter. We describe and apply methods to interpret the gravity changes in terms of local hydrological processes and vertical ground motions. The effect of land water is computed from local rainfall data and a model of rain accumulation and discharge in the ground. The effect of the vertical motions of the ground is estimated using time-series of permanent Global Positioning System (GPS) stations and the theoretical gravity to height ratio of -2 μGal cm-1. Unexpectedly, Morakot typhoon (2009 August), the strongest typhoon in Taiwan in 50 yr, was responsible for the highest gravity changes. Morakot triggered numerous large landslides and debris flow deposits. Their thicknesses are estimated from the gravity changes (up to 280 μGal) along with field observations and satellite images.

Time variable gravity

Creep and deformation




Maxime Mouyen

National Chiao Tung University

Université de Strasbourg

Frederic Masson

Université de Strasbourg

Cheinway Hwang

National Chiao Tung University

Ching-Chung Chen

National Chiao Tung University

Nicolas Le Moigne

Université de Montpellier

C.W. Lee

Industrial Technology Research Institute of Taiwan

Ricky Kao

Industrial Technology Research Institute of Taiwan

National Chiao Tung University

University of Calgary

Wen-Chi Hsieh

National Central University

National Chiao Tung University

Geophysical Journal International

0956-540X (ISSN)

Vol. 192 1 113-136




Multidisciplinär geovetenskap



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