千阳县地下水的动态特征与影响因素

Dynamic characteristics and influence factors of the groundwater in Qianyang

目的了解千阳县地下水的动态特征与影响因素。方法对千阳县1980-2010年的地下水水位动态数据作统计分析研究。结果 (1)千河南岸支流稀疏,源短流急,其地下水位动态的主导因素为降水量且存在滞后1年的显著响应,总体趋势下降。(2)千河北岸河流支流面积广阔,地下水位的补给来源包括降水量和水文补给,地下水位总体动态呈现上升趋势。(3)千阳县原区的地下水位在人为活动控制因素下出现明显的突变现象。结论不同地理条件下地下水位的主导因素的不同造成千阳县地下水动态特征存在空间差异性。

Purposes--To understand the dynamic characteristics and influence factors of groundw- ater in Qianyang County. Methods--The data of groundwater during the period of 1980 to 2010 were investigated with statistical method. Results--（1） Because there are sparse tributaries whose source flow is short but vioIent on the south bank of the Qianhe River, the dynamic leading factors of groundwater level was precipitation and the significant response lagged one year, thus the overall trend declined. （2） Because there is vast river area on the north bank of the Qianhe River, the supply sources of groundwater level include precipitation and hydrological supplies, the overall trend for groundwater level was rising. （3） The groundwater level of table land in Qianyang County, Shaanxi, China, appeared obvious mutation phenomenon under the control factors of human activities. Conclu- sion-Research shows that there is spatial difference in the dynamic characteristics of groundwater in Qianyang County, which was caused by different geographical conditions of the difference in dominant factors of groundwater level.