Soil Physical Properties of Collapsing Hill and Gully and Their Indications for Soil Erosion: An Example of Liantanggang Collapsing Hill  and Gully in Wuhua County of Guangdong

  • Liu Xilin ,
  • Zhang Dalin ,
  • Jia Yaoyao
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  • 1.School of Geography  and Planning, Sun Yat-Sen University, Guangzhou 510275, China;
    2.Guangdong Key Laboratory for Urbanization and Geo-simulation, Guangzhou 510275, China

Received date: 2013-01-18

  Revised date: 2013-04-25

  Online published: 2013-07-10

Abstract

Collapsing hills  and gullies concentrating in  7 provinces (autonomous regions) of southeast China, mainly in Guangdong and Fujian with a total area of approximate 50 000 km2, are the most serious area of soil erosion in southeast China. Collapsing hill and gully is resulted from the hydraulic-gravity compound erosion, and  is the result of gully erosion. In southeast China, Collapsing hills and gullies mainly generate on the thick layer of weathering crust of granite. High viscous clay and low coarse gravel are the main feature of the collapsing soil. The average median grain size of the collapsing soils from top to toe shows a change from coarseness to fine, reflecting the erosion and transportation processes of running water on slope. The soil of collapsing hill and gully is easily erodible. The erodible factor K value averagely is about 0.26, more than 0.03 to 0.05 compared with the K value of red soil in southeast China. The K value of the collapsing soils is greater in slope foot than that on the top, indicating the erosion at the slope toe is greater than that on the top, which provides a new interpretation for the mechanism of the collapse hill and gully processes. The collapsing wall and colluvial deposits have 10.53% clay content, more than 5% of the necessary requirement for debris flow initiation. When steep collapsing hill and gully terrains are coupled with the appropriate rainfalls,  may be transformed into “debris flow”, but the debris flow’s grain size is much smaller (only about 1/12) than that of the conventional debris flow, and gravel content is only a quarter of the debris flow. Therefore, the collapsing hill and gully transformed into debris flow (namely the collapsing hill transformed into debris flow) is not the conventional sense of debris flow, and it is a new debris flow subtype: Clay sand flow.

Cite this article

Liu Xilin , Zhang Dalin , Jia Yaoyao . Soil Physical Properties of Collapsing Hill and Gully and Their Indications for Soil Erosion: An Example of Liantanggang Collapsing Hill  and Gully in Wuhua County of Guangdong[J]. Advances in Earth Science, 2013 , 28(7) : 802 -811 . DOI: 10.11867/j.issn.1001-8166.2013.07.0802

References

[1]Qiu Shijun. Cutting-toppling: One of patterns of slop disintegration erosion[J].Bulletin of Soil and Water Conservation, 1999, 19(6): 20-22.[丘世钧. 切割下坠——砂页岩地区崩岗源头墙壁后退方式之一[J]. 水土保持通报, 1999,19(6): 20-22.]

[2]Zhao Hui, Luo Jianmin. Analysis on genesis erosion of dilapidated granite and approach to integrated system of prevention and control in Hu’nan[J]. Soil and Water Conservation in China, 2006, (5):1-3.[赵辉, 罗建民. 湖南崩岗侵蚀成因及综合防治体系探讨[J]. 中国水土保持, 2006, (5):1-3.]

[3]Li Siping. The geotechnical essence of the collapsed gully forming in Guangdong[J]. Soil and Water Conservation in Fujian, 1991, (4): 28-33.[李思平. 广东崩岗形成的岩土本质[J]. 福建水土保持, 1991, (4): 28-33.]

[4]Li Siping. A study on characteristics of rock-soil and countermeasures of the collapsed mound formation[J]. Journal of Soil Water Conservation, 1992, 6(3): 29-35.[李思平. 崩岗形成的岩土特性及其防治对策的研究[J]. 水土保持学报, 1992, 6(3): 29-35.]

[5]Wu Zhifeng, Wang Jizeng. Relationship between slope disintegration and rock soil characteristics of granite weathering mantle in South China[J].Journal of Soil Water Conservation, 2000, 14(2): 31-35.[吴志峰, 王继增. 华南花岗岩风化壳岩土特性与崩岗侵蚀关系[J]. 水土保持学报, 2000, 14(2): 31-35.]

[6]Ge Hongli, Huang Yanhe, Jiang Fangshi, et al. Analysis on the rock types in the collapse hill area[J]. Subtropical Soil and Water Conservation, 2012, 24(1):13-19.[葛宏力, 黄炎和, 蒋芳市, 等. 崩岗发生区岩土类型分析[J]. 亚热带水土保持, 2012, 24(1):13-19.]

[7]Wang Xueqiang, Cai Qiangguo, He Jijun, et al. Influence of the level characteristics of granite weathering crust on soil erosion and control measures[J]. Subtropical Soil and Water Conservation, 2008, 20(2):20-24.[王学强, 蔡强国, 和继军, 等. 花岗岩风化壳的层次特性对土壤侵蚀及其防治措施的影响[J]. 亚热带水土保持, 2008, 20(2):20-24.]

[8]Wang Yanzhong, Hu Yaoguo, Li Dingqiang, et al. The preliminary investigation of soil erosive factors in granitic weathering rinds in western Guangdong Province[J]. Ecology and Environment, 2008, 17(1): 403-410.[王艳忠, 胡耀国, 李定强, 等. 粤西典型崩岗侵蚀剖面可蚀性因子初步分析[J]. 生态环境, 2008, 17(1): 403-410.]

[9]Lu Dong, Hu Yaoguo, Peng Siqing, et al. Application of shallow earth temperature survey in investigating the relationships of spatial distribution between the typical weathering slope collapse and groundwater[J]. Ecology and Environmental Sciences, 2011, 20(2): 208-216.[卢冬, 胡耀国, 彭四清, 等. 应用浅层地温测量法分析崩岗侵蚀与地下水分布关系[J]. 生态环境学报, 2011, 20(2): 208-216.]

[10]Zhang Dalin, Liu Xilin. Evolution and phases division of collapsed gully erosion landform[J]. Journal of Subtropical Resources and Environment, 2011, 6(2): 23-28.[张大林, 刘希林. 崩岗侵蚀地貌的演变过程及阶段划分[J]. 亚热带资源与环境学报, 2011, 6(2): 23-28.]

[11]White S E. Alpine mass movement forms (noncatastrophic): Classification, description, and significance[J].Arctic and Alpine Research, 1981, 13(2): 127-137.

[12]Liu Xilin, Tan Yonggui. Recognition and development of basic ideas of modern geomorphology[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni,2012, 51(4):112-118.[刘希林, 谭永贵. 现代地貌学基本思想的认识和发展[J]. 中山大学学报:自然科学版, 2012, 51(4):112-118.]

[13]Jiao Bintian, Lu Xiaobing, Wang Shuyun, et al. The movement of fine grains and its effects on the landslide and debris flow caused by raining[J]. Chinese Journal of Underground Space and Engineering, 2005, 1(7): 1 014-1 016.[矫滨田, 鲁晓兵, 王淑云, 等. 土体降雨滑坡中细颗粒运移及效应[J]. 地下空间与工程学报, 2005, 1(7): 1 014-1 016.]

[14]Wischmeier W H, Jhonson C B, Cross B V. A soil erodibility nomograph for farmland and construction sites[J]. Soil Water Conserve, 1971, 26: 189-193.

[15]Sharply A N, Williams J R. EPIC-erosion/productivity impact calculator: 1. Model documentation[J]. Technical Bulletin-United States Department of Agriculture, 1990,(1 768):235.

[16]Lü Xixi, Shen Rongming. A preliminary study on the values K of soil erosibility factor[J]. Journal of Soil and Water Conservation, 1992, 6(1): 63-70.[吕喜玺, 沈荣明. 土壤可蚀性因子K值的初步研究[J]. 水土保持学报, 1992, 6(1): 63-70.]

[17]Men Mingxin, Zhao Tongke, Peng Zhengping, et al. Study on the soil erodibility based on the soil particle-size distribution in Hebei Province[J].Scientia Agricultura Sinica, 2004, 37(11): 1 647-1 653.[门明新, 赵同科, 彭正萍, 等. 基于土壤粒径分布模型的河北省土壤可蚀性研究[J]. 中国农业科学, 2004, 37(11): 1 647-1 653.]

[18]Cen Yi, Ding Wenfeng, Zhang Pingcang. Spatial distribution of soil erodibility factor(K) in Central China[J].Journal of Yangtze River Scientific Research Institute,2011, 28(10): 65-68.[岑奕, 丁文峰, 张平仓. 华中地区土壤可蚀性因子研究[J]. 长江科学院院报, 2011, 28(10): 65-68.]

[19]Liu Qingxuan, Wu Xiangnan. Experiences and methods of collapsing hills control in Meixian county[J]. Soil and Water Conservation in China, 1991, (4):8-13.[刘庆宣, 巫祥南. 梅县治理崩岗泥石流的经验和做法[J]. 中国水土保持, 1991,(4): 8-13.]

[20]Feng Minghan, Liao Chunyan, Li Shuangxi, et al. Investigation on status of collapsing hill and soil erosion in southern China[J].Yangtze River, 2009, 40(8): 66-68.[冯明汉, 廖纯艳, 李双喜, 等. 我国南方崩岗侵蚀现状调查[J]. 人民长江, 2009, 40(8): 66-68.]

[21]Gregoretti C. Experimental evidence from the triggering of debris flow along a granular slope[J]. Physics and Chemistry of the Earth, Part B: Hydrology, Oceans and Atmosphere, 2000, 25(4): 387-390.

[22]Wu Jishan, Kang Zhicheng, Tian Lianquan, et al. Observational Studies on Debris Flows in Jiangjiagou, Yunnan[M]. Beijing: Science Press, 1990: 63-68.[吴积善, 康志成, 田连权,等. 云南蒋家沟泥石流观测研究[M]. 北京: 科学出版社, 1990: 63-68.]

[23]Kang Zhicheng, Li Zhuofen, Ma Ainai, et al.Debris Flow in China[M]. Beijing: Science Press, 2004.[康志成, 李焯芬, 马蔼乃,等. 中国泥石流研究[M]. 北京: 科学出版社, 2004.]

[24]Pierson T C. Dominant particle support mechanisms in debris flows at Mt.Thmas, New Zealand, and implications for flow mobility[J]. Sedimentology, 1987, 28: 49-60.

[25]Chen Zhongxue, Wang Ren, Hu Mingjian, et al. Study of content of clay particles for debris flow occurrence in Jiangjia Ravine[J]. Rock and Soil Mechanics, 2010, 31(7): 2 197-2 201.[陈中学, 汪稔, 胡明鉴, 等. 黏土颗粒含量对蒋家沟泥石流启动影响分析[J]. 岩土力学, 2010, 31(7): 2 197-2 201.]

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