A new soil mechanics approach to quantify and predict land subsidence by peat compression

详细信息    查看全文

• 作者：Kay Koster ; Gilles Erkens ; Cor Zwanenburg
• 刊名：Geophysical Research Letters
• 出版年：2016
• 出版时间：28 October 2016
• 年：2016
• 卷：43
• 期：20
• 页码：10,792-10,799
• 全文大小：626.6KB
• ISSN：1944-8007

文摘

Land subsidence threatens many coastal areas. Quantifying current and predicting future subsidence are essential to sustain the viability of these areas with respect to rising sea levels. Despite its scale and severity, methods to quantify subsidence are scarce. In peat-rich subsidence hot spots, subsidence is often caused by peat compression. We introduce the standard Cone Penetration Test (CPT) as a technique to quantify subsidence due to compression of peat. In a test in the Holland coastal plain, the Netherlands, we found a strong relationship between thickness reduction of peat and cone resistance, due to an increase in peat stiffness after compression. We use these results to quantify subsidence of peat in subsiding areas of Sacramento-San Joaquin delta and Kalimantan, and found values corresponding with previously made observations. These results open the door for CPT as a new method to document past and predict future subsidence due to peat compression over large areas.