Abstract:
According to the observing data of ground water level in the area of Qitai oasis nearby the eastern Junggar coalfield from 1983 to 2013, the change trend of the water level was analyzed by the use of the Surfer software. Results show that the average level of ground water in this area decreases with a speed of 0.51 meters per year, and the decreasing rates in west section and east section are different with the values of 0.65 meters per year and 0.37 meters per year respectively in past decades. In west section, the declining of the ground water level formed lots of depression cones and shows a continuous expanding area. The ground water level in south-east area is higher than that of north-west area. Generally, the ground water flows from the south part to the north part in this area. The distribution of the ground water level coincides with the terrains of this area with the same fluctuation. The ground water level also shows a trend of declining from the south part to the north part in this area. Agriculture water injection is the main reason for the change of ground water level in past decades.