[Study on geochemical susceptivity of groundwater system in representative karstic regions].
We investigated geochemical susceptivity of groundwater in representative karst groundwater system. The results indicated that Ca2+ and Mg2+, correlative the average values of geochemical susceptivity index (GSI) were 0.73 and 0.19; HCO3- and SO4(2-), interrelated the average values of geochemical susceptivity index were 0.92 and 0.37, are the principal cations and anions in karstic groundwater system, respectively. And the major elements are obviously characterized by the geochemical susceptivity. The rank order of geochemical susceptivity for major elements in study region is HCO3- > Ca2+ > SO4(2+) > Mg2+ > Cl- > Na+ > NO3- > K+. The susceptive regions of groundwater system were zoned by the geochemical susceptivity index of HCO3- (GSI(HCO3-)), which classified as GSI(HCO3-) < 0.5 is low-susceptivity zone, 0.5 < GSI(HCO3-) < 1 is moderate-susceptivity zone and GSI(HCO3-) > 1 is high-susceptivity zone, respectively. The groundwater systems in high-susceptivity zone may become as a collected and genetic room for pollutants. Furthermore, both continual or active exchange and mutual recharge between surface water and groundwater in high-susceptivity zones might induce intersectant pollution and serious cycle.
He
Shou-yang
SY
Laborary of Earth's Interior and Geofluids, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China. hesy813@126.com
Zhu
Li-jun
LJ
Dong
Zhi-fen
ZF
Zhang
Yi
Y
Yu
Xiao-hong
XH
D002681:China; D004784:Environmental Monitoring; D005618:Fresh Water / Q000737:chemistry*; D019015:Geologic Sediments / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry
D012987:Soil; D014874:Water Pollutants, Chemical