In this study, the temporal and spatial variation of groundwater depth in the urban area of Xi'an city, China, was analyzed using the Mann-Kendall test and the geostatistics method. The study result showed that the groundwater depth in the urban area of Xi'an city was increasing. The groundwater depths in different places were in a great difference, and the groundwater level in groundwater mining area was sensitive to the variation of environment. Spatially, the groundwater depth decreased progressively from southeast to northwest. The groundwater depths of the year 1984 and 2010 were of medium spatial correlation, and of great anisotropy. The spatial variability of groundwater depth was the consequence of the combined action of the structural factors including topography, geomorphology, and geological structure, as well as the random factor of groundwater mining.
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