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依据咸阳市1986-2008年地下水监测资料和气象资料,运用灰色系统理论和数理统计方法对咸阳市的气候干燥度和地下水的变化特征及关系进行了分析。结果显示:(1)咸阳市各分区地下水位以不同速率持续下降,到2010、2011年泾河两岸黄土高原区地下水位将比2008年分别下降0.6m和0.9m;黄土台原区降低0.52m和0.81m;河流阶地区降低1m和1.3m;水位下降的主要原因是人为影响。(2)在1961-2009年间,咸阳市气候呈明显的变干趋势,且在1985年发生这种变干趋势的突变,影响着地下水位的变化。deMartonne气候干燥度和地下水埋深呈负相关关系,即气候越干燥地下水水位就越低。结果显示咸阳市地下水系统长期得不到补给恢复,希望受到重视。
Based on the groundwater monitoring data and meteorological data from 1986 to 2008 in Xianyang City, the paper analyzes the characteristics of the dryness of the climate in Xianyang City and the relationship between the groundwater changes and gray system theory and mathematical statistics. The results show that: (1) The groundwater table of Xianyang sub-district continues to decline at different rates. By 2010 and 2011, the groundwater table in the Loess Plateau will be decreased by 0.6m and 0.9m respectively compared with 2008; the loess plateau will be reduced by 0.52m and 0.81m; the river terrace area is reduced by 1m and 1.3m; the main reason for the decrease of water level is man-made impact. (2) During 1961-2009, the Xianyang climate showed a clear trend of drying up. In 1985, this sudden change of dryness trend affected the change of groundwater level. The deMartonne climate has a negative correlation with the groundwater depth, ie the drier the climate, the lower the groundwater level. The result shows that the groundwater system in Xianyang City has not been recharged for a long time and hopes to be taken seriously.