The Yazd-Ardakan basin in Central Iran has two separated aquifers. The shallow unconfined aquifer is supplies 40 Qanats. The deep saturated confined aquifer is the main water storage. Due to over-withdrawal, water table has been decreasing during last 25 years. Recent study shows that the shortage of the aquifer is about 16 meters and land subsidence is 0.5 1.2 meters. Long deep cracks are foun...

Interferometric synthetic aperture radar (InSAR) has great potential to detect and quantify land subsidence caused by aquifer system compaction. InSAR maps with high spatial detail and resolution of range displacement (610 mm in change of land surface elevation) were developed for a groundwater basin (;10 km) in Antelope Valley, California, using radar data collected from the ERS-1 satellite. T...

Analyses of areal variations in the subsidence and rebound occurring over stressed aquifer systems, in conjunction with measurements of the hydraulic head fluctuations causing these displacements, can yield valuable information about the compressibility and storage properties of the aquifer system. Historically, stress-strain relationships have been derived from paired extensometer/piezometer i...

Leakage properties and the potential for land subsidence due to groundwater withdrawal from a multi-aquifer water supply system were investigated by applying leaky type curve and one dimensional consolidation models to drawdown data that were obtained during a pumping test experiment in an aquifer-aquitard system. The producing aquifer has transmissivity and storativity values of 5.3 X 10" m s"...

This dissertation investigates the application of interferometric synthetic aperture radar (InSAR) to the measurement and interpretation of surface displacements over developed aquifer systems. Land subsidence over developed groundwater systems has been observed in a wide variety of hydrogeologic settings worldwide. The phenomenon can be explained with elastic and inelastic deformation of water...

[1] Permanent scatterer InSAR (PSInSARk) provides a new high-resolution methodology for detecting and precisely measuring long-term and seasonal aquifer-system response to pumping and recharge. In contrast to conventional InSAR, the permanent scatterer methodology utilizes coherent radar phase data from thousands of individual radar reflectors on the ground to develop displacement time series a...

Abstract In the Rafsanjan plain, Iran, excessive use of groundwater for pistachio irrigation since 1960s has led to a severe water level decline as well land subsidence. this study, advantages InSAR analyses and flow modeling are combined improve understanding subsurface processes causing groundwater-related subsidence in several areas region. For purpose, calibration scheme numerical model was...

The Taiyuan Formation limestone aquifer and Ordovician are widely distributed in the coal seam floor of measures North China; water hazard safety problem stope under influence mining is very prominent. risk inrush from closely related to degree full exploitation, so it necessary study stability conditions, especially working face length effect on stability. Through numerical simulation water-ro...

Ever decreasing water resources and climate change have driven the increasing use of groundwater causing land subsidence in many countries. Geodetic sensors such as InSAR, GPS leveling can detect surface deformation but cannot measure subsurface deformation. A single-well, single-depth extensometer be used to deformation, it delineate depths major compaction provide insight about mechanism thro...

Abstract Along with Siwa Oasis depression, there are several ponds, lakes, and Sabkhas features resulted from the current flows through springs due to over-pressure of deep sandstone aquifer. The Nubia Sandstone aquifer (NSA) Carbonate main two water-bearing units. They separated by a huge thickness shale controlled complicated structural faults. There ten wells including gamma-ray, short long ...