Basic overview towards the assessment of landslide and subsidence risks along a geothermal pipeline network

6th ITB International Geothermal Workshop

Astisiasari^1 ; Van Westen, Cees^1 ; Jetten, Victor^1 ; Van Der Meer, Freek^1 ; Hizbaron, Dyah Rahmawati^2

Faculty of Geo-Information Science and Earth Observation, University of Twente, Enschede, Netherlands^1

Faculty of Geography and Environmental Science, University of Gadjah Mada (UGM), Yogyakarta, Indonesia^2

关键词: assessment;    Engineering structures;    Environmental safety;    Generate electricity;    geothermal;    Geothermal reservoir;    Geothermal Working Areas;    Pipeline infrastructure;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/103/1/012006/pdf
DOI  :  10.1088/1755-1315/103/1/012006

来源: IOP

【 摘 要 】

An operating geothermal power plant consists of installation units that work systematically in a network. The pipeline network connects various engineering structures, e.g. well pads, separator, scrubber, and power station, in the process of transferring geothermal fluids to generate electricity. Besides, a pipeline infrastructure also delivers the brine back to earth, through the injection well-pads. Despite of its important functions, a geothermal pipeline may bear a threat to its vicinity through a pipeline failure. The pipeline can be impacted by perilous events like landslides, earthquakes, and subsidence. The pipeline failure itself may relate to physical deterioration over time, e.g. due to corrosion and fatigue. The geothermal reservoirs are usually located in mountainous areas that are associated with steep slopes, complex geology, and weathered soil. Geothermal areas record a noteworthy number of disasters, especially due to landslide and subsidence. Therefore, a proper multi-risk assessment along the geothermal pipeline is required, particularly for these two types of hazard. This is also to mention that the impact on human fatality and injury is not presently discussed here. This paper aims to give a basic overview on the existing approaches for the assessment of multi-risk assessment along geothermal pipelines. It delivers basic principles on the analysis of risks and its contributing variables, in order to model the loss consequences. By considering the loss consequences, as well as the alternatives for mitigation measures, the environmental safety in geothermal working area could be enforced.