the study area is situated in the middle part of the tabas block. it contains outcrops of rocks that formed along longitudinal faults in early cimmerian orogenic phase. the basin subsided along these faults from the late triassic to early cretaceous, which include two sedimentary cycles. a sedimentary cycle, related to upper triassic to bajocian is known as shemshak group. another sedimentary c...

A/uiciit siles orii;iiuil!y posilioiwd íIIOIIí; the Nile delta's coastal iitargin arc used us ¡íIIUííCS to measure effects of «eustutic» sea-level rise (~l mm/year) and latid loweriii)> (= subsidence) of the sediment substrate beneath settlements during die late Holocene. The combined effect of titese two factors, referred to as relative sea-level chanfle, resulted in submergence and/or burial ...

This paper presents a numerical analysis of pluvial flooding to evaluate the impact of land subsidence on flood risks in urban contexts using a hydraulic model (FloodMap-HydroInundation2D). The pluvial flood event of August 2011 in Shanghai, China is used for model calibration and simulation. Evolving patterns of inundation (area and depth) are assessed over four time periods (1991, 1996, 2001 ...

The leveling measurements have been traditionally made for the monitoring of ground subsidence, but this technique is known to be not timeand cost-effective. Instead, GPS has been recently used as one of the most convenient and precise techniques for the geodetic applications, in terms of high accuracy monitoring. A GPS monitoring network consisting of 52 GPS stations was set up in Yunlin Count...

The surface subsidence process induced by underground coal mining is a dynamic process, but the existing time function models can’t reflect the regularity of surface subsidence with time properly. By investigating the whole development process of subsidence, subsidence velocity and subsidence acceleration with time, a new time function model is presented that takes the dynamic characteristics i...

Over the past two decades, the Leizhou Peninsula has suffered from many geological hazards and great property losses caused by land subsidence. However, the absence of a deformation map of the whole peninsula has impeded the government in making the necessary decisions concerning hazard prevention and mitigation. This study aims to provide the evolution of land deformation (subsidence and uplif...

This research used both ERS and JERS-1 images to investigate the feasibility of differential radar interferometry (DInSAR) for mine subsidence monitoring in the state of New South Wales, Australia. DInSAR results are analysed and validated with the aid of Geographic Information System (GIS) tools. The drawbacks of using interferometric measurements for mine subsidence monitoring are discussed. ...

Mining subsidence associated with longwall extractions beneath significant natural features such as rivers and streams in the Southern Coalfield of New South Wales has posed risks to the natural environment. In this paper, a case study is presented showing the methodology in two-dimensional UDEC (Itasca 2006) modeling for mining induced subsidence around river valley, taking advantage of the di...

Groundwater exploitation is a major cause of land subsidence, which in coastal areas poses a flood inundation hazard that is compounded by the threat of sea-level rise (SLR). In the lower Mekong Delta, most of which lies <2 m above sea level, over-exploitation is inducing widespread hydraulic head (i.e., groundwater level) declines. The average rate of head decline is ∼0.3 m yr, based on time-s...

InSAR technology is applied to measuring surface deformation caused by groundwater extraction in this Paper. ERS1/2 and JERS-1 SAR data are both considered. Firstly, characters of Cangzhou city and the subsidence are studied first. According to the characters, appropriate processing methods are designed for this experiment. 2-pass instead of 3-pass differential method is chosen. JERS1 SAR image...