A REVIEW ON PROGRESSES ON APPLICATION OF THE 7Be TRACER TECHNIQUE IN THE ESTIMATE OF SOIL EROSION
Received date: 2000-11-16
Revised date: 2001-02-19
Online published: 2001-08-01
7Be is a cosmogenic radionuclide (half-life, 53.3 days) produced by spallation of oxygen and nitrogen atoms within the troposphere and stratosphere. Subsequently, it is transported to the soil surface by wet and dry deposition, and fixed by the soil particles rapidly and strongly. It has a similar environmental chemical behavior as 137Cs. Therefore, it can be used to document the short-term rates, patterns and seasonal variations of soil redist ribution representing the influences of specific land use or particular event, such as a storm. The 7Be tracer technique can be used as a complement to ot her alternative radioactive tracer techniques (such as 137Cs and 210Pb), which can be employed to examine the medium or long term rate soil erosion, in the investigation on the characteristics of soil erosion occurred, especially, in the analysis of the dominant type of erosion process, within the specific catchment. The existing quantitative models for soil erosion estimate using 7Be tracer technology was reviewed in this paper, and some additional intensive works were also suggested.
Key words： Rate of soil erosion; 7Be; Quantitative model
TANG Xiangyu,YANG Hao,LI Renying,ZHAO Qiguo . A REVIEW ON PROGRESSES ON APPLICATION OF THE 7Be TRACER TECHNIQUE IN THE ESTIMATE OF SOIL EROSION[J]. Advances in Earth Science, 2001 , 16(4) : 520 -525 . DOI: 10.11867/j.issn.1001-8166.2001.04.0520
[1]Buringh P. An Assessment of Losses and Degradation of Productive Agricultural Land in the World[R]. Rome: Working Group on Soil Policy of Food and Agriculture Organization, FAO, UN, 1981.
[2]Brown L R. Conserving soils [A]. In: Brown L R. State of the World[C]. New York: Norton, 1984. 53-75.
[3]Olsen C R, Larse I L, Lowry P D, et al. Atmospheric fluxes and marsh-soil inventories of 7Be and 210Pb [J]. J Geophys Res, 1985, 90: 10 487-10 495.
[4]Baskaran M, Coleman C H, Santschi P H. Atmospheric deposition fluxes of 7Be and 210Pb at Galveston and College Station, Texas
[J]. J Geophys Res, 1993, 98: 20 555-20 571.
[5]Baskaran M. A search for the seasonal variability on the depositional fluxes of 7Be and 210Pb [J]. J Geophys Res, 1995, 100: 2 833-2 840.
[6]Wallbrink P J, Murray A S. Fallout of 7Be in south eastern Australia [J]. J Environ Radioact, 1994, 25: 213-228.
[7]Hawly N, Robbins J A, Eadie B J. The partitioning of 7Beryllium in fresh water [J]. Geochim Cosmochim Acta, 1986, 50: 1 127-1 131.
[8]Bai Z G, Wan G J, Wang C S, et al.Geochemical specification of soil 7Be, 137Cs, 226Ra and 228Ra as tracer to particle transport [J]. Pedosphere, 1997, 7(3): 263-268.
[9]Bai Z G, Wan G J, Wang C S, et al. 7Be: A geochemical tracer for seasonal erosion of surface soil in watershed of Lake Hongfeng, Guizhou, China [J]. Pedosphere, 1996, 6(1): 23-28.
[10]Murray A S, Olley J M. Natural radionuclide behavior in the fluvial environment [J]. Radiat Prot Dosim, 1992, 45: 285-288.
[11]Young J A, Silker W A. Aerosol deposition on the Pacific and Atlantic oceans calculated from 7Be measurements [J]. Earth Planetary Sci Letter, 1987, 50: 92-104.
[12]Wan G J, Santschi P H, Sturm M, et al. Natural (210Pb, 7Be) and fallout (137Cs, 239,240Pu, 90Sr) radionuclides as geochemical tracers of sedimentation in Greifensee, Switzerland [J]. Chem Geol, 1987, 63: 181-196.
[13]Blake W H, Walling D E, He Q. Fallout beryllium-7 as a tracer in soil erosion investigations [J]. Appl Radiat Isotopes, 1999, 51:599-605.
[14]Wallbrink P J, Murray A S. Distribution and variability of 7Be in soils under different surface cover conditions and its potential for describing soil redistribution processes [J]. Water Resource Res, 1996, 32: 467-476.
[15]Walling D E, He Q P, Blake W. Use of 7Be and 137Cs measurements to document short- and medium-term rates of water-induced soil erosion on agricultural land [J]. Water Resource Res, 1999, 35(12): 3 865-3 874.
[16]Wallbrink P J, Murray A S. Use of fallout radionuclides as indicators of erosion processes [J]. J Hydrol Processes, 1993, 7: 297-304.
[17]Burch G J, Barnes C J, Moore I D, et al. Detection and prediction of sediment sources in catchments: use of 7Be and 137Cs [A].Proceedings of the Hydrological and Water Resources Symposium ACT [C]. Inst Eng Aust, Nat Conf Publ, 1988. 146-151.
[18]Tang Xiangyu, Yang Hao, Zhao Qiguo, et al. Review on progresses in application of the 137Cs tracer technique to the estimate of soil erosion [J]. Advance in Earth Sciences, 2000,15(5):576-582.[唐翔宇，杨浩，赵其国，等．137Cs示踪技术在土壤侵蚀估算中的应用研究进展[J]．地球科学进展，2000，15（5）：576-582．]
/
| 〈 |
|
〉 |
甘公网安备62010202000687
