| INVESTIGATING THE LAND SUBSIDENCE BEHAVIOR IN SINKHOLE AREAS USING INSAR |
| Paper ID : 1240-SMPR |
| Authors: |
|
Mahdi khoshlahjeh *1, Yasser Maghsoudi2, Sajjad Sajedizasdeh2, Amir Shemshaki3, Daniele Perissin4 1Geodesy and Geomatics Engineering Faculty, K.N. Toosi University of Technology,
No. 1346, ValiAsr Street, Mirdamad cross,Tehran, Iran. 2Geodesy and Geomatics Faculty, K.N.Toosi University of Technology, Tehran, Iran 3Geological Survey of Iran 4Lyle School of Civil Engineering, Purdue University, Indiana, USA |
| Abstract: |
| In the plains of Iran, for many reasons, the most important of which are groundwater withdrawals, we see high annual subsidence rates. In some of these plains, karstic soil and its solubility lead to the creation of sinkholes in different dimensions in terms of diameter and depth. Sinkholes have two characteristics of a high displacement rate and limited area indicating their limited diameter. The fundamental question is whether there is a relationship between the area of subsidence and the area of the formation of the sinkholes and whether the behavior of displacement in these areas differ. In this paper, we study the behavior of this phenomenon by radar interferometry using RADAR satellite data. The case study is located in the area of sinkhole formation in the Kerdabad region of Hamedan and the Eij plain of Fars province. Using the DInSAR technique as well as PSInSAR, the amount of land displacement in the sinkhole area was investigated. Since the formed sinkhole is enlarged over time due to the collapse of the area around it, sinkhole changes over time were also studied. The results show that the study area was affected by subsidence. Also before incidence, the sinkhole area had different displacement behavior compared to other areas that were affected by subsidence. The reason for this is the sharp decline in groundwater levels in recent years, which was accompanied by changes in the depth of the bedrock as well as soil types that lead to various outcomes. |
| Keywords: |
| SATELLITE، SUBSIDENCE، SINKHOLE، InSAR، RADARGRAMMETRY |
| Status : Paper Accepted (Poster Presentation) |
