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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。
Considering a single water sample as a vector of n chemical components, the space composed of n-dimensional vectors approximates to the distance space. Groundwater with the same source of supply or closer hydraulic connection has less impact on other groundwater resources Close to the distance, the greater the chemical composition difference, the longer the distance, the worse the hydraulic connection. Based on the above principles, 44 water samples from Badain Jaran Desert and its adjacent areas were analyzed by principal component analysis and cluster analysis. The calculation results show that the recharge of groundwater comes from the glacier and snow water in Qilian Mountains. According to the clustering characteristics, it is further deduced that the snow and water in Qilian Mountains pass through Nooru through the subsurface flow and then reach the ancient rivulets and the lakes.