降雨击溅下鄂尔多斯松散砒砂岩粒径分选特性及其敏感性分析

doi:10.16843/j.sswc.2022.06.004

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Abstract [Background] Soil erosion is very serious in the Pisha-sandstone area of Inner Mongolia Ordos, and rainfall erosion is an important factor causing soil erosion in Pisha-sandstone, while rainfall splash is the main erosion mode of soil at the early stage of rainfall. Since splash dispersion changes soil particles in the parent material, it is important to investigate the sorting law of rainfall splash on the particle size of loose Pisha-sandstone and the sensitivity to the sorting of particle size at all levels to reveal the mechanism of erosion of loose Pisha-sandstone at the beginning of rainfall. [Methods] Indoor artificial rainfall simulation was used to conduct spattering experiments on loose Pisha-sandstone. In order to reveal more clearly and intuitively the sorting degree of each particle size in the splash erosion samples by rainfall intensity and slope, the magnitude of the absolute value of the change rate was introduced to indicate the variation of the number of particles in each grain size interval, and the trend of the variation was reflected by the positive or negative rate of change. [Results] The slope and rainfall intensity are the main influencing factors for the occurrence of spattering erosion of Pisha-sandstone. On the slope with slope less than or equal to 20°, rainfall intensity is the most sensitive factor for splash erosion of loose Pisha-sandstone, in which the percentages of medium sand, fine sand and very fine sand particles increase with the increase of rainfall intensity, and the percentages of up-slope quantity are always larger than those of down-slope; while the percentages of powder sand quantity decrease with the increase of rainfall intensity, and the percentages of up-slope quantity are smaller than those of down-slope. In the slope with slope greater than or equal to 30°, the sensitive factors of spattering of loose Pisha-sandstone are slope and rainfall intensity, and the increase of rainfall intensity makes the size of soil particles that can be migrated gradually increase; when the slope and rainfall intensity are the same, the percentage change of the number of fine sand particles is the largest, and the effect of spattering on the sorting of fine sand is the most significant, then the medium sand, very fine sand, and silty sand in order. [Conclusions] The severity of spatter erosion occurring in loose Pisha-sandstone is the result of the combined coupling of multiple factors such as rainfall intensity, slope, and soil particle size. Among them, rainfall intensity and ground slope have the greatest effect, but the sensitivity of these two factors can vary depending on the size of different particles.

Key words： loose Pisha-sandstone splash erosion rate of change particle size sorting sensitivity

Received: 15 February 2021

PACS:

S157.1

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	LI Xiaoli
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LI Xiaoli,GUO Luomin. Grain size sorting characteristics of loose Pisha-sandstone in Ordos under rainfall splash and its sensitivity analysis[J]. SSWC, 2022, 20(6): 25-33.

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http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2022.06.004 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2022/V20/I6/25

[1]	姚文艺,吴志仁,刘慧,等. 黄河流域砒砂岩区抗蚀促生技术试验[J].人民黄河,2015,37(1):6. YAO Wenyi,WU Zhiren,LIU Hui,et al. Experimental research on the anti-erosion and vegetation promotion for sandstone region in the Yellow River basin[J]. Yellow River,2015,37(1):6.
[2]	李晓丽,于际伟,刘李杰,等. 鄂尔多斯砒砂岩土壤侵蚀与气候条件关系的研究[J]. 内蒙古农业大学学报(自然科学版),2014,35(3):105. LI Xiaoli,YU Jiwei,LIU Lijie,et al. Study on relationship between Pisha-sandstone soil erosion and climatic conditions of Ordos[J]. Journal of Inner Mongolia University(Natural Science Edition),2014,35(3):105.
[3]	刘慧,时明立,蔡怀森,等. 砒砂岩侵蚀的物理特性研究[J]. 人民黄河,2016,38(6):8. LIU Hui,SHI Mingli,CAI Huaisen,et al. Management technology and demonstration effect on two-dimensional configuration in Pisha-sandstone area[J]. Yellow River,2016,38(6):8.
[4]	白杭改. 砒砂岩侵蚀脆弱性的成因砒砂岩侵蚀脆弱性的成因:以鄂尔多斯盆地东北部三叠系二马营组为例[D].长春:吉林大学,2017:18. BAI Hanggai. The causes of erosion vulnerability for Pisha-sandstone: A case from Ermaying formation of Triassicin the notrheast of the Ordos basin[D]. Changchun:Jilin University, 2017:18.
[5]	叶浩,石建省,李向全,等. 砒砂岩岩性特征对抗侵蚀性影响分析[J]. 地球学报,2006,27(2):145. YE Hao,SHI Jiansheng,LI Xiangquan,et al. The effect of soft rock lithology upon its anti-erodibility[J]. Acta Geoscientica Sinica. 2006,27(2):145.
[6]	唐政洪,蔡强国,李忠武,等. 内蒙古砒砂岩地区风蚀、水蚀及重力侵蚀交互作用研究[J]. 水土保持学报,2001,15(2):25. TANG Zhenghong, CAI Qiangguo, LI Zhongwu, et al. Study on interaction among wind erosion, hydraulic erosion and gravity erosion in sediment-rock region of Inner Mongolia[J]. Journal of Soil and Water Conservation,2001,15(2):25.
[7]	张洪江. 土壤侵蚀原理[M]. 北京:中国林业出版社,2000:39. ZHANG Hongjiang. Elements of soil erosion[M]. Beijing: China Forestry Publishing House,2000:39.
[8]	常平,李晓丽,李明玉,等. 冲蚀条件下砒砂岩坡面细沟侵蚀特性分析[J]. 人民黄河, 2018,40(5):98. CHANG Ping,LI Xiaoli,LI Mingyu,et al. Analysis of rill erosion characteristics of Pisha-sandstone slope under the conditions of erosion[J]. Yellow River,2018,40(5):98.
[9]	尉迟文思,姚云峰,郭月峰,等.砒砂岩地区3种主要树种边材液流动态特征[J].水土保持学报,2017,31(5):203. YUCHI Wensi, YAO Yunfeng,GUO Yuefeng, et al. Dynamic variation of sapwood flow of three main tree species in a soft sand-rock area [J]. Journal of Soil and Water Conservation,2017,31(5):203.
[10]	张强,李晓丽,陈溯航,等. 多因素影响下砒砂岩融沉特性试验研究[J]. 水土保持通报, 2017,37(1):45. ZHANG Qiang,LI Xiaoli,CHEN Suhang,et al.Experimental study on thawing settlement performance of feldspathic sandstone subjected to various factors[J].Bulletin of Soil and Water Conservation, 2017,37(1):45.
[11]	UDDEN J A. Mechanical composition of clastic sediments[J]. Bulletin of the Geological Society of America,1914 (25):655.
[12]	WENTRERTH C K. A scale of grade and class terms for clastic sediments[J]. Journal of Geology,1922(30):377.
[13]	GEORGE V C. Principles of sedimentology[J]. Earth-science Reviews,1979,14(4):375.
[14]	SIMON J B, KENNETH P. GRADISTAT: A grain size distribution and statistics package for the analysis of unconsolidated sediments[J]. Earth Surface Processes and Landforms,2001,26(5):1237.
[15]	郭雒敏,李晓丽,王文,等. 坡度对紫红色砒砂岩击溅侵蚀的影响[J]. 中国水土保持科学,2019,17(1):1. GUO Luomin,LI Xiaoli,WANG Wen,et al. Influence of slope on the splash erosion of mauve Pisha-sandstone in bare areas[J]. Sciences of Soil and Water Conservation,2019,17(1):1.
[16]	巩灿旺. 内蒙古准格尔旗土地利用变化及其生态环境效应研究[D].呼和浩特:内蒙古农业大学,2015:21. GONG Canwang. Research on land use change and its ecological and environmental effects in Jungeer Banner, Inner Mongolia [D]. Hohhot:Inner Mongolia Agricultural University,2015:21.
[17]	庄新田,高莹,金秀,等. 证券投资分析[M]. 2版. 北京:清华大学出版社,2013:230. ZHUANG Xintian,GAO Ying,JIN Xiu,et al. Securities investment analysis[M]. 2nd edition. Beijing:Tsinghua University Press,2013:230.
[18]	郭雒敏. 松散砒砂岩击溅侵蚀力学机理研究[D].呼和浩特:内蒙古农业大学,2019:15. GUO Luomin. Study on the mechanical mechanism of splash erosion of loose Pisha-sandstone[D]. Hohhot:Inner Mongolia Agricultural University, 2019:15.
[19]	ALLEN R F. The mechanics of splashing[J]. Journal of Colloid Interface Science[J],1988(124):309.
[20]	ANDREW C. A physically-based model of the dispersion of splash droplets ejected from a water drop impact[J]. Earth Surface Processes and Landforms,1986,11:351.
[21]	DAVID J F,KATHETINE K H. Rain splash of dry sand revealed by high-speed imaging and sticky paper splash targets[J]. Journal of Geophysical Research,2007(112):F01001.