GPS-measured land subsidence in Ojiya City, Niigata Prefecture, Japan

被引：65

作者：

Sato, HP ^{[1
]}

Abe, K ^{[1
]}

Ootaki, O ^{[1
]}

机构：

[1] Min Land Infrastruct & Transport, Geog Survey Inst, Tsukuba, Ibaraki 3050811, Japan

来源：

ENGINEERING GEOLOGY | 2003年 / 67卷 / 3-4期

关键词：

land subsidence; global positioning system (GPS); ground water; coefficient of volume compressibility; Niigata Prefecture; Japan;

D O I：

10.1016/S0013-7952(02)00221-1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Land subsidence caused by compression of clay layers in Ojiya City, Japan was measured by global positioning system (GPS) between 1 April 1996 and 31 December 1998. Three baselines were selected in and around the city, and height difference on a WGS-84 ellipsoid was measured by GPS on each baseline. The ground at the GPS station in the city subsides and rebounds 7 cm every winter and spring, respectively. Measurement accuracy was 9.5 mm standard deviation. Ground water level was observed at a well near the GPS station. Regression analysis between total strain, calculated as ratio of the height difference displacement to the total thickness of the clay layers, and the layers' effective stress change with ground water level change gave good correlation. The slope of regression line 7.0 x 10(-11) m(2)/N was obtained as an average apparent coefficient of volume compressibility of the layers. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：379 / 390

页数：12