MONITORING OF LAND SUBSIDENCE AND IMPACTS OF HUMAN ACTIVITIES IN THE YELLOW RIVER DELTA USING THE SMALL BASELINE SUBSET METHOD

Small baseline subset (SBAS) InSAR technology was used to process the 30 scenses of descending Envisat/ASAR data, spanning from early 2007 to late 2010 and covering the whole Yellow River Delta. The distribution pattern of surface deformation is revealed, and the time series of the deformation characteristics in some typical subsidence area established. Combined with relevant data, the relationship between the regional ground subsidence and the production of ground water and hydrocarbon are carefully studied. The relationship between land subsidence and fault activity is also analyzed. The results suggest that human activities, such as ground water extraction, oil and gas exploitation and construction of buildings are the main causes for land subsidence in the Yellow River Delta.