水化学成分聚类法分析巴丹吉林沙漠及邻区地下水补给源

把单个水样看成由n个化学成分构成的向量,n维向量组成的空间近似为距离空间,在其它因素影响不大的情况下,具有相同补给源或有较密切水力联系的地下水具有较近的距离,化学成分差别越大,这种距离越远,水力联系越差。基于以上原理对巴丹吉林沙漠及邻区的44个水样进行了主成分和聚类分析。计算结果表明该地地下水补给来自于祁连山冰川雪水,根据聚类特征进一步得出推论,祁连山雪水通过地下渗流经过诺尔图,然后到达古日乃和拐子湖的。

Application of the Method of Water Chemical Composition Clustering to the Analysis on Recharge Sources of Groundwater in Badain Jaran Desert and Its Adjoining Regions

Each water sample is taken as the vector with n chemical compositions, and the space formed from n vectors is approximately taken as the distance space. Under the condition that the influence of other factors to the chemical compositions can be negligible, the groundwater with the same recharging resource or the close hydraulic relation would have shorter distance. If there is big different in the chemical compositions the distance is farther and the relation is worse. Based on the said principle the composition and clustering analysis on 44 water samples from Badain Jaran Desert and the adjoining regions are carried out. The calculation results show that the groundwater in the regions is recharging from the snow water in Qilian Mountain. According to the clustering feature it is further indicated that the snow water in Qilian Mountain pass through Nuoertu in the form of groundwater seepage, then recharge the Gurinai and Guaiz Lakes.