|
|
|
CH4 Concentrations and Emissions from Three Rivers in the Chaohu Lake Watershed in Southeast China |
YANG Li-biao, LI Xin-yan, YAN Wei-jin, MA Pei , WANG Jia-ning |
1.Institute of Geographical Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, P.R.China
2.Graduate University, Chinese Academy of Sciences, Beijing 100049, P.R.China |
|
|
摘要 This study was conducted at three rivers of the Chaohu Lake watershed during the summer season of 2008, aiming to investigate the diurnal variations of dissolved CH4 concentrations and emissions, as well as the dynamics of CH4 accumulation emission rates over consecutive 72 h. The results showed that CH4 concentrations in the Fengle, Hangbu, and Nanfei rivers ranged from 56.33-124.79, 160.82-341.03, and 213.49-716.81 nmol L-1, respectively, over a daily cycle; while the saturation of CH4 ranged from 188.72-418.07, 538.74-1 142.46, and 715.23-2 401.38%, respectively, which indicated that surface waters were in all cases oversaturated with respect to the atmosphere. An obvious diurnal variation pattern of the dissolved CH4 concentrations demonstrated a higher value during daytime but a lower value for night time. Additionally, the highest dissolved CH4 concentrations were detected in the Nanfei River which received substantial urban wastewater discharges. CH4 emissions measured with floating chambers ranged from 5.82-15.46, 5.77-8.41, and 13.51-49.25 mg C m-2 h-1 for the Fengle, Hangbu, and Nanfei rivers, respectively, over a daily cycle. Significantly higher CH4 emissions were also observed from the Nanfei River. The accumulative CH4 emissions for each river increased with time, while a decline trend on the accumulation rates was investigated over the consecutive 72 h.
Abstract This study was conducted at three rivers of the Chaohu Lake watershed during the summer season of 2008, aiming to investigate the diurnal variations of dissolved CH4 concentrations and emissions, as well as the dynamics of CH4 accumulation emission rates over consecutive 72 h. The results showed that CH4 concentrations in the Fengle, Hangbu, and Nanfei rivers ranged from 56.33-124.79, 160.82-341.03, and 213.49-716.81 nmol L-1, respectively, over a daily cycle; while the saturation of CH4 ranged from 188.72-418.07, 538.74-1 142.46, and 715.23-2 401.38%, respectively, which indicated that surface waters were in all cases oversaturated with respect to the atmosphere. An obvious diurnal variation pattern of the dissolved CH4 concentrations demonstrated a higher value during daytime but a lower value for night time. Additionally, the highest dissolved CH4 concentrations were detected in the Nanfei River which received substantial urban wastewater discharges. CH4 emissions measured with floating chambers ranged from 5.82-15.46, 5.77-8.41, and 13.51-49.25 mg C m-2 h-1 for the Fengle, Hangbu, and Nanfei rivers, respectively, over a daily cycle. Significantly higher CH4 emissions were also observed from the Nanfei River. The accumulative CH4 emissions for each river increased with time, while a decline trend on the accumulation rates was investigated over the consecutive 72 h.
|
Received: 07 December 2010
Accepted: 11 April 2012
|
Fund: This research was supported by the National Natural Science Foundation of China (20777073). |
Corresponding Authors:
Correspondence YAN Wei-jin, Tel: +86-10-64863998, E-mail: yanwj@igsnrr.ac.cn
E-mail: yanwj@igsnrr.ac.cn
|
About author: YANG Li-biao, E-mail: libiaoyang@yahoo.com |
Cite this article:
YANG Li-biao, LI Xin-yan, YAN Wei-jin, MA Pei , WANG Jia-ning.
2012.
CH4 Concentrations and Emissions from Three Rivers in the Chaohu Lake Watershed in Southeast China. Journal of Integrative Agriculture, 12(4): 665-673.
|
[1]de Angelis M A, Lilley M D. 1987. Methane in surface waters of Oregon estuaries and rivers. Limnology and Oceanography, 32, 716-722. [2]de Angelis M A, Scranton M I. 1993. Fate of methane in the Hudson River and Estuary. Global Biogeochemical Cycles, 7, 509-523. [3]Bange H W, Bartell U H, Rapsomankis S, Andreae M O. 1994. Methane in the Baltic and North Seas and a reassessment of the marine emissions of methane. Global Biogeochemical Cycles, 8, 465-480. [4]Bange H W, Ramesh R, Rapsomanikis S, Andreae M O. 1998. Methane in the surface waters of the Arabian Sea. Geophysical Research Letters, 25, 3547-3550. [5]Bates T S, Kelly K C, Johnson J E, Gammon R H. 1996. A reevaluation of the open ocean source of methane to the atmosphere. Journal of Geophysical Research, 101, 6953-6961. [6]Bartlett K B, Crill P M, Bonassi J A, Richey J E, Harriss R C. 1990. Methane flux from the Amazon River floodplain: emissions during the rising water. Journal of Geophysical Research, 95, 16773-16788. [7]Boeckx P, Cleemput O, 1996. Van flux estimates from soil methanogenesis and methanotrophy: landfills, rice paddies, natural wetlands and aerobic soils. Environmental Monitoring and Assessment, 42, 189-207. [8]Borges A V, Vanderborght J P, Schiettecatte L S, Gazeau F, Ferrón-Smith S, Delille B, Frankignoulle M. 2004. Gas transfer velocities of CO2 in a macrotidal estuary (the Scheldt). Estuaries, 27, 593-603. [9]Casper P, Maberly S C, Hall G H, Finlay B J. 2000. Fluxes of methane and carbon dioxide from a small productive lake to the atmosphere. Biogeochemistry, 49, 1-19. [10]Chin K J, Conrad R. 1995. Intermediary metabolism in methanogenic paddy soil and the influence of temperature. FEMS Microbiology Ecology, 18, 85-102. [11]Clark J F, Schlosser P, Simpson H J, Stute M, Wanninkhof R, Ho D T. 1995. Relationship between gas transfer velocities and wind speeds in the tidal Hudson River determined by the dual tracer technique. In: Air-Water Gas Transfer. AEON Verlag and Studio, Hanau, Germany. pp. 785-800. [12]Chen B, Mai B X, Chen S J, Yang Q S, Sheng G Y, Fu J M. 2005. Nonylphenol in sediments from rivers of the Oear River Delta. China Environmental Science, 25, 484-486. [13]Duchemin E, Lucotte M, Canuel R, Chamberland A. 1995. Production of the greenhouses gases CH4 and CO2 by hydroelectric reservoirs of the boreal region. Global Biogeochemical Cycles, 9, 529-540. [14]Ding W X, Cai Z C, Tsuruta H. 2005. Plant species effects on methane emissions fromfreshwater marshes. Atmospheric Environment, 39, 3199-3207. [15]Devol A H, Richey J E, Clark W A, King S L, Martinelli L A. 1988. Methane emissions to the troposphere from the Amazon floodplain. Journal of Geophysical Research, 93, 1583-1592. [16]Ford P W, Boon P I, Lee K. 2002. Methane and oxygen dynamics in a shallow floodplain lake: the significance of periodic stratification. Hydrobiologia, 485, 97-110. [17]Frost T, Upstill-Goddard R C. 1999. Air-sea gas exchange into the millennium: progress and uncertainties. Oceanography and Marine Biology, 37, 12-45. [18]Hope D, Palmer S M, Billett M F, Dawson J J C. 2004. Variations in dissolved CO2 and CH4 in a first-order stream and catchment: an investigation of soil-stream linkages. Hydrological Processes, 18, 3255-3275. [19]Harrison J A, Matson P A, Fendorf S E. 2005. Effects of a diel oxygen cycle on nitrogen transformations and greenhouse gas emissions in a eutrophied subtropical stream. Aquatic Science, 67, 308-315. [20]Huttunen J T, Lappalainen K M, Saarijärvi E, Väisänen T, Martikainen P J. 2001. A novel sediment gas sampler and a subsurface gas collector used for measurement of the ebullition of methane and carbon dioxide from a eutrophied lake. Science of the Total Environment, 266, 153-158. [21]Huttunen J T, Väisänen T S, Hellsten S K, Heikkinen M, Nykänen H, Jungner H, Niskanen A,Virtanen M O, Lindqvist O V, Nenonen O S, et al. 2002. Fluxes of CH4, CO2, and N2O in hydroelectric reservoirs Lokka and Porttipahta in the northern boreal zone in Finland. Global Biogeochemical Cycles, 16, doi:10.1029/ 2000GB001316. IPCC. 2007. Summary for policymakers. In: Solomon S, Qin D, Manning M, Chen Z, Marquis M, Averyt K B, Tignor M, Miller H L, eds., Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. Johnson K M, Hughes J E, Donaghay P L, Sieburth J M. 1990. Bottle-calibration static head space method for the determination of methane dissolved in seawater. Analytical Chemistry, 62, 2408-2412. [22]Kiene R P. 1991. Production and consumption of methane in aquatic systems. In: Rogers J E, Whitman W B, eds., Microbial Production and Consumption of Greenhouse Gases: Methane, Nitrous Oxide, and Halomethanes. Amarican Society for Microbiology, Washington D.C. pp. 111-146. [23]Khalil M A K, Rasmussen R A. 1983. Sources, sinks, and seasonal cycles of atmospheric methane. Journal of Geophysical Research, 88, 5131-5144. [24]Kremer JN, Nixon SW, Buckley B, Roques P. 2003. Technical note: Conditions for using the floating chamber method to estimate air-water gas exchange. Estuaries, 26, 995-990. [25]Lelieveld J, Crutzen, P J, Dentener F J. 1998. Changing concentration, lifetime and climate forcing of atmospheric methane. Tellus, 50B, 128-150. [26]Laursen A E, Seitzinger S P. 2004. Diurnal patterns of denitrification, oxygen consumption and nitrous oxide production in rivers measured at the whole-reach scale. Freshwater Biology, 49, 1448-1458. [27]Purvaja G R, Ramesh R. 2001. Natural and anthropogenic methane emission from coastal wetlands of South India. Environmental Management, 27, 547-557. [28]Ramos F M, Lima I B T, Rosa R R, Mazzi E A, Carvalho J C, Rasera M F F L, Ometto J P H B, Assireu A T, Stech J L. 2006. Extreme event dynamics in methane ebullition fluxes from tropical reservoirs. Geophysical Research Letters, 33, L21404. [29]Ramakishnan B, Satpathy S N, Patnaik P, Adhya T K, Rao V R, Sethunathan N. 1995. Methane production in two Indian rice soils. Geomicrobiology Journal, 13, 193-199. [30]Rajkumar A N, Barnes J, Ramesh R, Purvaja R, Upstill-Goddard R C. 2008. Methane and nitrous oxide fluxes in the polluted Adyar River and estuary, SE India. Marine Pollution Bulletin, 56, 2043-2051. [31]Raymond P A, Cole J J. 2001. Gas exchange in rivers and estuaries: choosing a gas transfer velocity. Estuaries, 24, 312-317. [32]St Louis V L, Kelly A C, Duchemin E, Rudd J W M, Rosenberg D M. 2000. Reservoir surfaces of greenhouse gases to the atmosphere: a global estimate. Bioscience, 50, 766-775. [33]Song C C, Zhang L H, Wang Y Y, Zhao Z C. 2006. Annual dynamics of CO2, CH4, N2O emissions from freshwater marshes and affected by nitrogen fertilization. Environmental Science, 27, 2369-2375. (in Chinese) [34]Tarasova O A, Brenninkmeijer C A M, Assonov S S, Elansky N F, Röckmann T, Brass M. 2006. Atmospheric CH4 along the Trans-Siberian railroad (TROICA) and river Ob: Source identification using stable isotope analysis. Atmospheric Environment, 40, 5617-5628. [35]Liss P S, Slater P G. 1974. Flux of gases across the air-sea interface. Nature, 247, 181-184. [36]Upstill-Goddard R C, Barnes J, Frost T, Punshon S, Owens N J P. 2000. Methane in the southern North Sea: Lowsalinity inputs, estuarine removal, and atmospheric flux. Global Biogeochemical Cycles, 14, 1205-1217. [37]Wang D Q, Chen Z L, Wang J, Xu S Y, Yang H X, Chen H, Yang L Y. 2007. Fluxes of CH4, CO2 and N2O from Yangtze estuary intertidal flat in summer season. Geochimica. 36, 78-88. (in Chinese) [38]Wassmann R, Neue H U, Bueno C, Lantin R S, Alberto M C R, Buendia L V, Bronson K, Papen H, Rennenberg H. 1998. Methane production capacities of different rice soils derived from inherent and exogenous substrate. Plant and Soil, 203, 227-237. [39]Waddington J M, Roulet N T, Swanson R V. 1996. Water table control of CH4 emission enhancement by vascular plants in boreal peatlands. Journal of Geophysical Research, 101, 22775-22785. [40]Wang S L, Chen Z D, Zhang Z M. 1998. Methane emissions from lakes in Taiwan. Oceanologiaet limnologia Sinica, 29, 527-534. (in Chinese) [41]Wanninkhof R. 1992. Relationship between wind speed and gas exchange over the ocean. Journal of Geophysical Research, 97, 7373-7382. [42]Yan W J, Mayorga E, Li X Y, Seitzinger S P, Bouwman A F. 2010. Increasing anthropogenic nitrogen inputs and riverine DIN exports from the Changjiang river basin under changing human pressures. Global Biogeochemical Cycles, 24, doi:10.1029/2009GB003575. [43]Zhang G L, Zhang J, Ren J L, Li J B, Liu S M. 2008. Distributions and sea to air fluxes of methane and nitrous oxide in the North East China Sea in summer. Marine Chemistry, 110, 42-55. [44]Zappa C J, McGillis W R, Raymond P A, Edson J B, Hinsta E J, Zemmelink H J, Dacey J W H, Ho D T. 2007. Environmental turbulent mixing controls on air-water gas exchange in marine and aquatic systems. Geophysical Research Letters, 34, L10601. |
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
|
Shared |
|
|
|
|
|
Discussed |
|
|
|
|