摘要
利用重庆金佛山自然保护区22个地下水排泄点2005-2009年的水化学监测数据,对比了保护区内、外水化学特征差异及影响因素。结果表明:保护区外地下水的pH值较保护区内的要低,但电导率则较高;自然保护区外地下水的Ca2+、Mg2+、Na+、K+、Cl-、NO3-、SO24-、HCO3-浓度中值比自然保护区内的分别高27.78 mg/L、3.23 mg/L、3.47 mg/L、0.97 mg/L、2.38 mg/L、9.29 mg/L、15.06mg/L、42.03mg/L;保护区内白云岩地下水的Mg2+/Ca2+(摩尔比)为0.76～1.33,明显比保护区外灰岩、碎屑岩区的高,但保护区外灰岩地下水的Mg2+/Ca2+(摩尔比)较保护区内灰岩区的更高。岩溶地下水系统地球化学的敏感性以Ca2+、HCO3-、NO3-较为敏感,保护区内地下水的平均敏感指数(GSI)GSICa2+为0.097,GSIHCO-3为0.125,GSINO-3为0.008;保护区外地下水的GSICa2+为0.415,GSIHCO-3为0.334,GSINO-3为0.648。护区内所有取样点水质均为I或Ⅱ类;而保护区外地下水因受农业施肥、工业生活污水影响,1、16、19号泉的NO3-浓度偏高,为Ⅴ类,其余为Ⅲ类。总体上,保护区内水质明显优于保护区外,可见设立自然保护区对于保护岩溶水具有积极意义。
In light of the hydrochemical monitoring data of 22 groundwater discharge points, the differences of the hydrochemic features and the impact factors of the groundwater in and around the Jinfoshan natural re- serve,Chongqing is compared in the article. The results show that the pH values of the springs outside the reserve are lower than those inside, but the conductivity is higher. The median concentration of Ca2＋ ,Mg2＋ , Na＋ ,K＋ ,Cl- ,NO3 , SO4^2- and HCO3- around the reserve are respectively 27.78 mg/L, 3.23 mg/L, 3.47 mg/L,0.97 mg/L,2.38 mg/L,9.29 mg/L,15.06 mg/L and 42.03 mg/L higher than those inside the natural reserve. stone or The MgZ＋/Caz＋ （mole ratio） in dolomite aquifer is 0.76-1.33, obviously higher than that in lime- clastic rock aquifer. But in the same limestone aquifer the Mg2＋/Ca2＋ around the reserve is higher than those inside. The results indicate that GSICa2＋ is 0. 097,GSIHCO3^- is 0. 125,GSINO3^- is 0. 008 in the reserve,and GSIC4＋ is 0.415,GSIHCO3 is 0. 334,GSINo3 is 0. 648 around the reserve. The water quality of the reserve is mostly grade Ⅰ and Ⅱ. But affected by agricultural fertilization, industrial pollution and sewage discharge, the springs water outside the reserve is Ⅲ and Ⅴ , and the NO3- concentration is higher in springs NO. 1, NO. 16 and NO. 19. Over all, the water quality inside the reserve is significantly better than the out-side. It can clearly be seen that the establishment of natural reserves has positive significance for karst water protection.
出处
《中国岩溶》
CAS
CSCD
2012年第2期165-172,共8页
Carsologica Sinica
基金
国家自然科学基金项目(编号:41072192、41103068)
中央高校基本科研业务费专项资金资助项目(编号:XDJK2010B006)
重庆市科委院士专项(编号:CSTS,2010BC7004)
高等学校博士学科点专项科研基金项目(编号:20100182120029)
重庆市国土房管局科技项目
西南大学博士基金项目(编号:SWUB2008013、SWU111009)
关键词
地下水
地球化学
敏感性
自然保护区
重庆金佛山
groundwater
geochemistry
susceptibility
natural reserve
Jinfoshan in Chongqing
