文献类型：期刊文献

英文题名：Chemical characteristics and CO2 consumption of the Qingshuijiang River Basin, Guizhou Province, Southwestern China

作者：Lu, Jiemei An, Yanling Wu, Qixin Zhou, Shaoqi Wu, Yonggui

第一作者：Lu, Jiemei

通信作者：Wu, QX[1];An, YL[2];An, YL[3];Wu, QX[3]

机构：[1]Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R China;[2]Guizhou Inst Technol, Guiyang 550002, Guizhou, Peoples R China;[3]Guizhou Univ, Key Lab Karst Environm & Geohazard Prevent, Guiyang 550003, Guizhou, Peoples R China;[4]South China Univ Technol, Coll Environm & Energy, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China;[5]Guizhou Acad Sci, Shanxi Rd 1, Guiyang 550001, Guizhou, Peoples R China;[6]South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou 510641, Guangdong, Peoples R China

第一机构：Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R China;corresponding author), Guizhou Inst Technol, Guiyang 550002, Guizhou, Peoples R China;corresponding author), Guizhou Univ, Key Lab Karst Environm & Geohazard Prevent, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院;

年份：2018

卷号：52

期号：6

起止页码：441-456

外文期刊名：GEOCHEMICAL JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000456046700006)】；

基金：This work was supported by (1) the National Natural Science Foundation of China (No. 42603123, U1612442); (2) Natural Science Foundation of Guizhou Province, China (LH[2016]7457, QJH[2016]011); (3) the Ministry of Science and Technology of China for State Key Research and Development Project (2016YFC0400708); and (4) Top ecology discipline construction project of Guizhou province (No. GNYL[2017]007).

语种：英文

外文关键词：water chemistry; chemical weathering rate; CO2 consumption; karst river; Qingshuijiang River

摘要：Water samples were collected and analyzed for major ions in the dry season and wet season in the Qingshuijiang River Basin, to understand ion compositions and solute fluxes as related to rock weathering and associated CO2 consumption rates. The total dissolved solids (TDS) varied from 35.29 to 740.90 mg.L-1, and the mean value (217.5 mg.L-1) was significantly higher than the global rivers. Ca2+ and HCO3, dominated the ionic composition, accounting for approximately 61.95% of the total ionic budgets. TDS and major element concentrations decreased from the upstream to the downstream. Correlation and spatial distribution analysis showed that anthropogenic activities had a significant effect on water chemistry, probably contributed some 4.87% of the dissolved solutes. The chemical weathering rates were estimated to be 65.43 t.(km(2).a)(-1) (55.01 t.(km(2).a)(-1) and 10.42 t.(km(2).a)(-1) by carbonate and silicate weathering, respectively), comparable to the Changjiang River in China, but significantly higher than the average of world rivers. Atmospheric CO2 consumption rates by rock weathering within the basin was 72.57 x 10(4) mol.(km(2).a)(-1) , 2.95 times the global average. Furthermore, the atmospheric CO2 consumption by the rock weathering was estimated to be 12.45 x 10(9) mol.a(-1) (7.86 x 10(9) mol.a(-1) by carbonate weathering and 4.59 x 10(9) mol.a(-1) by silicate weathering, respectively), accounting for 0.11% of the global total consumption fluxes. The CO2 consumed by rock chemical weathering in the Qingshuijiang River Basin may constitute a significant part of the global carbon budget due to the intense CO2 consumption even though with the small area in the world.