Characterization and Evaluation of Soil Erosion in Shenzhen: Using Environmental Radionuclides

Abstract:

Nuclear tracer technology is quantitative and it has a high priority, which provides a unique method for understanding the mechanism of urban soil and water loss. ¹³⁷Cs + ²¹⁰Pb_ex combination tracer was applied to study the characterization and evaluation of soil Erosion in Shenzhen. The results indicate that the following: 1)Disturbances from urbanization has greatly changed surface soil in Shenzhen.¹³⁷Cs background inventory in Shenzhen range at 99 Bq/m²-653 Bq/m². 2)²¹⁰Pb_ex background inventory increase with altitude rise, which is attributed to the movement of water vapor. 3)Soil erosion in Shenzhen has a wide distribution area and exacerbated by severe human disturbance. Land development and steep orchard are key factors that influence urban soil and water loss. 4)Shenzhen should strictly carry out projects for soil and water conservation, such as returning steep slopes into forests and grasslands, and other ecological management reforms.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 211-222
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.211
• Online since: February 2014
• Authors: Jun Jie Li*, Ding Qiang Li, Mu Ning Zhuo
• Keywords: Environmental Radionuclides, Shenzhen, Soil Erosion

References

[1] ZHANG Linbo. The study of theory and method of urban ecological carrying capacity: A case study of Shenzhen[M]. Beijing: China environmental science press, 2009: 4-5.

[2] Pearl River water resources commission of the ministry of water resources. Bulletin of soil and water conservation monitoring of Pearl River basin in 2004[R]. Guangzhou: Pearl River water resources commission of the ministry of water resources, (2004).

DOI: 10.18307/2004.sup10

[3] XIAO Yi, WANG Ming. Soil and water loss area of our city in this year drop 5km2: Experts confirm shenzhen conservation effect[N]. Shenzhen special zone newspaper, 2010-03-28(A2).

[4] FUKUYAMA T, TAKENAKA C, ONDA Y. 137Cs loss via soil erosion from a mountainous headwater catchment in central Japan[J]. Sci Total Environ, 2005, 350(1/2/3): 238-247.

DOI: 10.1016/j.scitotenv.2005.01.046

[5] FENG Teng，CHEN Hongsong，ZHANG Wei，et al. 137Cs profile distribution character and its implication for soil erosion on Karst slopes of Northwest Guangxi[J]. Chinese Journal of Applied Ecology, 2011, 22(3): 593-599.

[6] SCHULLER P, WALLING D E, SEPULVEDA A, et al. Use of 137Cs measurements to estimate changes in soil erosion rates associated with changes in soil management practices on cultivated land[J]. Appl Radiat Isot, 2004, 60(5): 759-766.

DOI: 10.1016/j.apradiso.2003.11.087

[7] RODWAY-DYER S J, WALLING D E. The use of 137Cs to establish longer-term soil erosion rates on footpaths in the UK[J]. J Environ Manage, 2010, 91(10): 1952-(1962).

DOI: 10.1016/j.jenvman.2010.04.014

[8] ZHANG Xinbao, LONG Yi, HE Xiubin, et al. A simplified 137Cs transport model for estimating erosion rates in undisturbed soil[J]. J Environ Radioact, 2008, 99(8): 1242-1246.

DOI: 10.1016/j.jenvrad.2008.03.001

[9] FANG Haiyan, LI Qiuyan, SUN Liying, et al. Using 137Cs to study spatial patterns of soil erosion and soil organic carbon (SOC) in an agricultural catchment of the typical black soil region, Northeast China[J]. J Environ Radioact, 2012, 112: 125-132.

DOI: 10.1016/j.jenvrad.2012.05.018

[10] LI Junjie, LI Yong, WANG Yanglin, et al. Applicability study of using in-situ gamma ray spectrometry technique for 137Cs and 210Pbex inventories measurement in grassland environments[J]. Applied Radiation and Isotopes, 2010, 68(6): 1143-1149.

DOI: 10.1016/j.apradiso.2010.01.030

[11] LI Shuding. The principle and application of radiation ecology[M]. Beijing: China environmental science press, (2005).

[12] RITCHIE J C, RITCHIE C A. Bibliography of publications of 137Cs studies related to soil erosion and sediment deposition. In use of 137Cs in the study of soil erosion sedimentation, IAEA-TECDOC-1028[R]. Vienna: IAEA, (1998).

[13] Shenzhen soil census office. Shenzhen soil[M]. Shenzhen : Shenzhen soil census office, (1986).

[14] IAEA. Collection and preparation of bottom sediment samples for analysis of radionuclides and trace elements, IAEA-TECDOC-1360[R]. Vienna: IAEA, (2003).

[15] IAEA. Guidelines for radioelement mapping using gamma ray spectrometry data. IAEA-TECDOC-1363[R]. Vienna: IAEA, (2003).

[16] IAEA. Quantifying uncertainty in nuclear analytical measurements. IAEA-TECDOC-1401[R]. Vienna: IAEA, (2004).

[17] WANG Fujun. The isotope tracer technique in Agriculture[M]. Beijing: Agricultural press, (1989).

[18] WALLING D E, HE Q, WHELAN P A. Using 137Cs measurements to validate the application of the AGNPS and ANSWERS erosion and sediment yield models in two small Devon catchments[J]. Soil and Tillage Research, 2003, 69(1/2): 27-43.

DOI: 10.1016/s0167-1987(02)00126-5

[19] WALLING D E, ZHANG Y, HE Q. Models for converting radionuclide(137Cs, Excess 210Pb, and 7Be)measurements to estimates of soil erosion and deposition rates: IAEA-RCA mid-term progress review meetings [C]/Beijing: The Chinese Academy of Agricultural Sciences 2005: 5-16.

[20] ZAPATA F. Handbook for the assessment of soil erosion and sedimentation using environmental radionuclides[M]. Dordrecht: Kluwer Academic Publishers, 2002: 2-9.

[21] WALLING D E, HE Q. Final report on IAEA technical contract 10361PRO-RI: the global distribution of bomb-derives 137Cs reference inventories[R]. Exeter: Universit y of Exeter, (2000).

[22] GARCIA A E. Global distribution of 137Cs inputs for soil erosion and sedimentation studies[R]. Vienna: IAEA, (1998).

[23] CAMBRAY R S, PLAYFORD K, LEWIS G N J, et al. Radioactive fallout in air and rain: results to the end of 1988. AERE-R-13575[R]. Harwell: UK Atomic Energy Authority, (1989).

[24] YE Changqing, XU Shiming, ZHAO Wenhu, et al. Environmental radiation of nuclear tests and human health[M]. Beijing: National defense industry press, (2009).

[25] HOU Lanxing, XU Shiming, ZHAO Wenhu, et al. The investment of radioactivity background in agroenvironment around Daya-bay NPP. [R]/ China's nuclear technology report. Beijing: China's nuclear intelligence center, (1996).

[26] RENG Tianshan, CHENG Jianping. Environment and radiation[M]. Bejing: Atomic press, (2007).

[27] PAN Ziqiang, LIU Senlin. China radiation levels[M]. Beijing: Atomic press, (2010).

[28] LI Junjie, LI Yong, WANG Yanglin, et al. Study of Soil Erosion on the East-West Transects in theThree-Rivers Headwaters Region Using 137Cs and 210Pbex Tracing [J]. Research of Environmental Sciences, 2009, 22(12): 1452-1459.

[29] WALLING D E. Use of 137Cs and other fallout radionuclides in soil erosion investigations: progress, problems and prospects [R]/use of 137Cs in the study of soil erosion and sedimentation. Vienna: IAEA, (1998).

DOI: 10.1007/0-306-48054-9_9

[30] DONG Jie, YANG Dayuan. Land degradation and ecological reconstruction in the three gorges reservoir area[M]. Beijing: Science press, (2010).

[31] The ministry of water resources of the People's Republic of China. SL 190-2007 Standards for classification and gradation of soil erosion[S]. Beijing: China water conservancy and hydropower press, (2008).