DOI: 10.1016/j.apgeochem.2020.104520
论文题名: Chemical weathering and atmospheric CO2 consumption in the semi-arid Swarnamukhi basin (Peninsular India) estimated from river water geochemistry
作者: Patel P. ; Raju N.J. ; Subramanian V. ; Gossel W. ; Wycisk P.
刊名: Applied Geochemistry
ISSN: 8832927
出版年: 2020
卷: 113 语种: 英语
英文关键词: Chemical weathering
; CO2 consumption
; Forward model
; Granite gneiss
; Peninsular rivers
; Swarnamukhi river
Scopus关键词: Atmospheric thermodynamics
; Carbon dioxide
; Erosion
; Geochemistry
; Global warming
; Rivers
; Silicates
; Watersheds
; Carbonate weathering
; Chemical weathering
; CO2 consumption
; Forward modeling
; Geological setting
; River water samples
; Sampling stations
; Silicate weathering
; Weathering
英文摘要: A small ephemeral Swarnamukhi River (hard rock) basin, more sensitive to climate change, was sampled and analyzed for various parameters. A total of 66 river water samples (22 of each season) were collected from different sampling stations covering the whole Swarnamukhi River basin in pre- and post- and monsoon seasons. Chemical weathering rate data of the Swarnamukhi River basin is integrated with the available data of other large perennial (Godavari and Krishna) and ephemeral (Kaveri and Periyar) hard rock river basins of Peninsular India. The Peninsular river basins, including Swarnamukhi River basin, are mainly dominated by granitic gneissic terrain. Contribution of inputs through forward modelling shows: silicate > evaporite > carbonate > atmosphere. The mean silicate and carbonate weathering rates in the river basin observed are 27.15 tonnes.km−2.yr−1 and 9.45 tonnes.km−2.yr−1 in pre-monsoon season, whereas 32.73 tonnes.km−2.yr−1and 45.90 tonnes.km−2.yr−1 in post-monsoon season, respectively. The Swarnamukhi river has lower silicate weathering rate (annual average: 30.57 tonnes.km−2.yr−1) than other published river basins data (Narmada: 33.9 tonnes.km−2.yr−1; Nethravati: 42 tonnes.km−2.yr−1; Godavari: 45.6 tonnes.km−2.yr−1) due to different localized geological setting. Mean annual CO2 consumption for the Swarnamukhi River is 6.9 × 105 mol km−2.yr−1 which is comparable to other Peninsular rivers such as the Godavari (6 × 105 mol km−2.yr−1) and Gad (5.7 × 105 mol km−2.yr−1) rivers. The study further provides the inventory for CO2 consumption on river basin scale, which is an important consideration from the global warming point of view. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159778
Appears in Collections: 气候变化与战略
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作者单位: School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India; Department of Hydrogeology and Environmental Geology, Institute of Geosciences, MartinLuther University, Halle (Saale), 06120, Germany
Recommended Citation:
Patel P.,Raju N.J.,Subramanian V.,et al. Chemical weathering and atmospheric CO2 consumption in the semi-arid Swarnamukhi basin (Peninsular India) estimated from river water geochemistry[J]. Applied Geochemistry,2020-01-01,113