| 基于PCA和在线监测技术研究旅游活动对岩溶地下水水化学的影响 |
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| 关键词:tourism activities karst groundwater hydrochemistry PCA Jinfo Mountain |
| 基金项目:国家自然科学基金项目(编号: 41103068); 重庆市研究生科研创新项目(编号: CYS14056); 岩溶动力学重点实验室基金资助课题(编号: KDL201402) |
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| Influences of Tourism Activities on Hydrochemistry of Karst Groundwater Revealed by Principal Component Analysis and On-line Monitoring Technique |
| Karst groundwater is easy to be contaminated and respond quickly, and thus it is unreasonable to reveal the fast variation processes only based on several times of sampling. In this study, the position of pollution resources of Shuifang spring was confirmed by high-resolution online tracer test, and the geochemical information of Shuifang spring from December 1, 2014 to March 27, 2015 was acquired via high-resolution monitoring. Furthermore, the precipitation, soil water and tap-water of Jinfo Mountain Holiday Hotel and wastewater in this basin were sampled bimonthly. The results show that the recovery of uranium injected in the holiday hotel’s toilet is 82%, the shortest time and the mean time of the tracer transport from the injected point to Shuifang spring are 26.8 h and 90.3 h respectively. The values of geochemical parameters in the spring were close between the first monitoring stage (from December 1, 2014 to December 14, 2014) and the last monitoring stage (from March 5, 2015 to March 27, 2015), whereas three fluctuation periods occurred during the middle monitoring stage and this phenomenon coincided well with the peak of tourism activities. PCA analysis yielded 2 principal components accounting for 75.0% of the total variance. The first component indicated the influences of tourism activities (i.e., the decrease in pH value, dissolved oxygen and the increase in specific conductivity, salinity, turbidity, K+, Na+, Ca2+, Mg2+, Sr2+, TFe, TMn, SiO2, HCO– 3, Cl–, PO3– 4) , which accounted for 61.2% of the variability in the data. The second component represented the influences of precipitation (i.e. the increase in flow, NO– 3, Al3+ and the decrease in water temperature), which contributed 13.8% to the total variance. Therefore, tourism activities were the primary factor responsible for the variation of geochemical parameters in Shuifang spring during the monitoring period. |
| YU Zheng-liang,YUAN Dao-xian,YANG Ping-heng,LI Lin-li,XIE Shi-you.2016.Influences of Tourism Activities on Hydrochemistry of Karst Groundwater Revealed by Principal Component Analysis and On-line Monitoring Technique[J].Acta Geoscientica Sinica,37(2):232-240. |
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