CAJ | 학술논문

　　岩石的风化作用与碳循环有着极为密切的联系。韩江流域处于湿热地区，是广东省除珠江流域以外的第二大流域。对韩江水系进行了系统采样、测试分析显示，河水水化学组成以HCO 3和Ca-2＋为主，其次是SO 2-4和Na＋。 Gibbs图分析表明，韩江流域河水离子成分主要来源于岩石的风化释放；相关分析和因子分析则表明，蒸发盐岩、碳酸盐岩、硅酸盐岩风化过程对河水离子的贡献率分别为33.4％、27.7％和为10.5％。大气中的CO2通过参与岩石的化学风化过程对河水中溶解质的贡献率为20.2％。韩江流域河水中HCO 3有50.2％来自大-气CO2，由此估算韩江流域岩石化学风化对大气CO2的消耗量为73.33×108 mol/a。在主要支流中，由大到小的顺序是汀江、石窟河、宁江、五华河和梅潭河，分别为28.08×108，13.26×108，10.22×108，5.17×108和2.90×108 mol/a。韩江流域岩石化学风化对大气CO2的消耗率为252.2×103 mol/（km2.a）。各主要支流中岩石化学风化对大气 CO2消耗率最高的是宁江，为718.55×103 mol/（ km 2.a），其次是石窟河360.14×103 mol/（km 2.a），再依次递减的是五华河282.04×103 mol/（km 2.a），汀江237.73×103 mol/（km 2.a），梅潭河181.18×103 mol/（km 2.a）；韩江流域的平均化学风化率为54.11 t/（km 2.a），各主要支流由高到低依次为，宁江最高140.5 t/（km 2.a），石窟河71.2 t/（km 2.a），汀江52.39 t/（km 2.a），五华河51.02 t/（km 2.a），梅潭河38.04 t/（km 2.a）。
　　암석적풍화작용여탄순배유착겁위밀절적련계。한강류역처우습열지구，시광동성제주강류역이외적제이대류역。대한강수계진행료계통채양、측시분석현시，하수수화학조성이HCO 3화Ca-2＋위주，기차시SO 2-4화Na＋。 Gibbs도분석표명，한강류역하수리자성분주요래원우암석적풍화석방；상관분석화인자분석칙표명，증발염암、탄산염암、규산염암풍화과정대하수리자적공헌솔분별위33.4％、27.7％화위10.5％。대기중적CO2통과삼여암석적화학풍화과정대하수중용해질적공헌솔위20.2％。한강류역하수중HCO 3유50.2％래자대-기CO2，유차고산한강류역암석화학풍화대대기CO2적소모량위73.33×108 mol/a。재주요지류중，유대도소적순서시정강、석굴하、저강、오화하화매담하，분별위28.08×108，13.26×108，10.22×108，5.17×108화2.90×108 mol/a。한강류역암석화학풍화대대기CO2적소모솔위252.2×103 mol/（km2.a）。각주요지류중암석화학풍화대대기 CO2소모솔최고적시저강，위718.55×103 mol/（ km 2.a），기차시석굴하360.14×103 mol/（km 2.a），재의차체감적시오화하282.04×103 mol/（km 2.a），정강237.73×103 mol/（km 2.a），매담하181.18×103 mol/（km 2.a）；한강류역적평균화학풍화솔위54.11 t/（km 2.a），각주요지류유고도저의차위，저강최고140.5 t/（km 2.a），석굴하71.2 t/（km 2.a），정강52.39 t/（km 2.a），오화하51.02 t/（km 2.a），매담하38.04 t/（km 2.a）。
The weathering of the rock has a very close relationship with the carbon cycle .The Hanjiang River is the second largest river in Guangdong Province .A hot and humid climate prevails in the Han-jiang River basin.Based on tests and analysis of the samples from the Hanjiang River Basin , it is found that the chemical compositions of waters of the Hanjiang River and its tributaries are dominated by HCO 3 , SO-2-4 , Ca 2+and Na+.Gibbs graph analysis showed that the ion compositions were mainly from chemical weathering of rocks.Correlation analysis and principal composition analysis showed that weathe-ring processes of evaporates, carbonates, and silicate rocks contributed to the total dissolved mass of the Hanjiang River water by 33.4%, 27.7% and 10.5%, respectively, and atmospheric CO 2 by 20.2%. The contribution proportion of atmospheric CO 2 to the HCO 3 in the river water is about 50.2%, from-which the quantity of CO 2 consumption is calculated to be 73.33 ×10 8 mol/a.The descending order of atmospheric CO2 consumptions of main tributaries of the Hanjiang River is the Tingjiang River , Shikuhe River, Ningjiang River, Wuhuahe River, Meitanhe River, with 28.08 ×10 8 , 13.26 ×108 , 10.22 × 108 , 5.17 ×108 and 2.90 ×10 8 mol/a, respectively.The total CO2 consumption rate is about 252.2 × 103 mol/(km 2.a).The descending order of atmospheric CO 2 consumption rates of main tributaries of the Hanjiang River is the Ningjiang River (718.55 ×10 3 mol/(km 2.a)), Shikuhe River (360.14 ×10 3 mol/(km 2.a)), Wuhuahe River (282.04 ×10 3 mol/(km 2.a)), Tingjiang River (237.73 ×10 3 mol/(km 2.a)) , and the Meitanhe River (181.18 ×10 3 mol/(km 2.a)).The average chemical weathering rate of the Hanjiang River is 54.11 t/(km 2.a).The chemical weathering rates of main tributaries are 140.5 t/(km 2.a) in the Ningjiang River, 71.2 t/(km 2.a) in the Shikuhe River, 52.39 t/(km 2.a) in the Tingjiang River, 51.02 t/(km 2.a) in the Wuhuahe River and 38.04 t/(km 2.a) in the Meitanhe River.