Chemical Weathering Processes and Atmospheric CO<sub>2 </sub> Consumption in the Hanjiang River Basin, Guangdong Province

DING Jian; ; ZHOU Yongzhang; ; GAO Quanzhou

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Chemical Weathering Processes and Atmospheric CO₂ Consumption in the Hanjiang River Basin, Guangdong Province

更新时间：2023-12-11

- Chemical Weathering Processes and Atmospheric CO₂ Consumption in the Hanjiang River Basin, Guangdong Province
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 52, Issue 3, Pages: 117-127(2013)
- 作者机构：
  
  1. 中山大学地理科学与规划学院,广东,广州,510275
  2. 广东省地质过程与矿产资源探查重点实验室,广东,广州,510275
  3. 
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2013，
  
  Published Online：25 May 2013，
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DING Jian, , ZHOU Yongzhang, et al. Chemical Weathering Processes and Atmospheric CO₂ Consumption in the Hanjiang River Basin, Guangdong Province. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 52(3):117-127(2013)
DOI：

DING Jian, , ZHOU Yongzhang, et al. Chemical Weathering Processes and Atmospheric CO₂ Consumption in the Hanjiang River Basin, Guangdong Province. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 52(3):117-127(2013) DOI：

摘要

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

和Ca

为主，其次是SO

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CO

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

有50.2%来自大气CO

由此估算韩江流域岩石化学风化对大气CO

的消耗量为73.33×10

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08×108，13.26×10

10.22×10

5.17×10

和2.90×10

mol/a。韩江流域岩石化学风化对大气CO

的消耗率为252.2×10

mol/(km

.a)。各主要支流中岩石化学风化对大气CO

消耗率最高的是宁江，为718.55×10

mol/(km

.a)，其次是石窟河360.14×10

mol/(km

.a)，再依次递减的是五华河28204×10

mol/(km

.a)，汀江237.73×103 mol/(km

.a)，梅潭河181.18×10

mol/(km

.a)；韩江流域的平均化学风化率为54.11 t/(km

.a)，各主要河流由高到低依次为，宁江最高140.5 t/(km

.a)，石窟河71.2 t/(km

.a)，汀江52.39 t/(km

.a)，五华河51.02 t/(km

.a)，梅潭河38.04 t/(km

.a)。

Abstract

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 Hanjiang 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

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 weathering 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

by 202%. The contribution proportion of atmospheric CO

to the HCO

in the river water is about 50.2%

from which the quantity of CO

consumption is calculated to be 73.33×10

mol/a. The descending order of atmospheric CO

consumptions of main tributaries of the Hanjiang River is the Tingjiang River

Shikuhe River

Ningjiang River

Wuhuahe River

Meitanhe River

with 28.08×10

13.26×10

10.22×10

5.17×108 and 2.90×10

mol/a

respectively. The total CO

consumption rate is about 252.2×10

mol/(km

.a). The descending order of atmospheric CO

consumption rates of main tributaries of the Hanjiang River is the Ningjiang River (718.55×10

3

mol/(km

.a))

Shikuhe River(360.14×10

3

mol/(km

.a))

Wuhuahe River (282.04×10

3

mol/(km

.a)）

Tingjiang River (237.73×10

3

mol/(km

.a))

and the Meitanhe River (181.18×10

3

mol/(km

.a)). The average chemical weathering rate of the Hanjiang River is 5411 t/(km

.a). The chemical weathering rates of main tributaries are 140.5 t/(km

.a) in the Ningjiang River

71.2 t/(km

.a) in the Shikuhe River

52.39 t/(km

.a) in the Tingjiang River

51.02 t/(km

.a) in the Wuhuahe River and 38.04 t/(km

.a) in the Meitanhe River.

关键词

水化学特征化学风化CO2消耗韩江流域

Keywords

hydro chemical characteristicschemical weatheringatmospheric CO2consumptionHanjinag River Basin

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Chemical Weathering Processes and Atmospheric CO2 Consumption in the Hanjiang River Basin, Guangdong Province

DOI：

摘要

Abstract

关键词

Keywords

references

Chemical Weathering Processes and Atmospheric CO₂ Consumption in the Hanjiang River Basin, Guangdong Province