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.
纸质出版日期:2013,
网络出版日期:2013-5-25,
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丁健, 周永章, 高全洲, 等. 广东韩江流域化学风化作用及大气CO2消耗的分析[J]. 中山大学学报(自然科学版)(中英文), 2013,52(3):117-127.
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, 2013,52(3):117-127.
丁健, 周永章, 高全洲, 等. 广东韩江流域化学风化作用及大气CO2消耗的分析[J]. 中山大学学报(自然科学版)(中英文), 2013,52(3):117-127. 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, 2013,52(3):117-127. DOI:
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
4
2-
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
2
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CO
2
由此估算韩江流域岩石化学风化对大气CO
2
的消耗量为73.33×10
8
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2808×108,13.26×10
8
10.22×10
8
5.17×10
8
和2.90×10
8
mol/a。韩江流域岩石化学风化对大气CO
2
的消耗率为252.2×10
3
mol/(km
2
.a)。各主要支流中岩石化学风化对大气CO
2
消耗率最高的是宁江,为718.55×10
3
mol/(km
2
.a),其次是石窟河360.14×10
3
mol/(km
2
.a),再依次递减的是五华河28204×10
3
mol/(km
2
.a),汀江237.73×103 mol/(km
2
.a),梅潭河181.18×10
3
mol/(km
2
.a);韩江流域的平均化学风化率为54.11 t/(km
2
.a),各主要河流由高到低依次为,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)。
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
-
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 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
2
by 202%. 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 CO
2
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
13.26×10
8
10.22×10
8
5.17×108 and 2.90×10
8
mol/a
respectively. The total CO
2
consumption rate is about 252.2×10
3
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 5411 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.
水化学特征化学风化CO2消耗韩江流域
hydro chemical characteristicschemical weatheringatmospheric CO2consumptionHanjinag River Basin
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