Abstract
For the protection of Jinan springs, based on the monitoring data of groundwater quality during dry seasons in 2013, the chemical characteristics evolution of karst water was analyzed by RockWare Aq·QA software, combined with hydrogeological conditions in jinan spring area. According to the groundwater quality standard, the present situation of karst water was evaluated. On the basis of the F value of evaluation, the groundwater quality zone is partitioned by ArcGIS software. The results show that: (1) the groundwater chemical types complicated from the single type (HCO3–Ca and HCO3–Ca·Mg) in 1950s to some new types (HCO3·SO4-Ca,Cl·HCO3-Ca and Cl·SO4-Ca); (2) karst water chemical environment has changed, so that karst erosion rate accelerated; (3) the groundwater quality partition shows most of this area is good water, only part of this area is IV,V type water (poor water). Research suggests Jinan karst water quality has been deteriorating.
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