Hydrochemical characteristics and geochemical sensitivity of groundwater in typical karst hilly regions:A case study of Eastern Wugang
LUO Fei
SU Chuntian
PAN Xiaodong
YANG Yang
ZHAO Guangshuai
Abstract：This study investigated hydrochemical characteristics and geochemical sensitivity of groundwater in a typical karst hilly region.The results indicate that Ca2 + and Mg2 + are the main cations and HCO -3 and NO -3 are the main anions in the karst groundwater system,which are affected by water-rock interaction and human activities;groundwater system,which is affected by water-rock interaction and human activities.The result also indicates the ratio of Mg2 +/ Ca2 + ,controlled by lithology,is the highest in the dolomite second highest in the limestone dolomite,and the lowest in limestone.In general,the karst groundwater in the study area shows a high geochemical sensitivity which follows the order as HCO -3 >Ca2 + >Mg2 + >NO -3 >SO 2 -4 > Cl- > Na+ > K+ .In particular,the cation Ca2 + is the most sensitive,followed by Mg2 + ,while HCO -3 is the most sensitive inthe anions,followed by NO -3 .The sensitivity level of the karst groundwater in the study area is classified by the most sensitive factor HCO -3 .Consequently,the low sensitive water spots account for only 7.27％,the medium sensitive ones account for about 25.45％,while the highly sensitive ac-count for about 67.28％.These statistic results of the geochemical sensitivity division show that the protec-tion of groundwater is very important and urgent.
Keywords：karst hilly areagroundwaterwater chemistrygeochemistrysensitivity
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 211-217 )