Selection of judging indicators for surface morphology of soil crack under different development degrees in Yuanmou arid-hot valley region

Xiong, Donghong; Lü, Xianguo; Xian, Jishen; Zhou, Huiyang; Zhong, Yang

doi:10.1007/s11859-008-0317-8

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…The photographs of soil cracks taken in the simulation experiment were processed through the procedures described above, and then the indicators for surface morphology of soil cracks were selected. According to previous research results [5], soil cracks' morphology can be described by three criteria: cracks' morphological intensity, complexity and connectivity. Among them, intensity indicators for surface morphology of cracks are the most visual, precise indicators in expressing crack morphology, which have been applied by several researchers for several times before [6, 7 and 8].…”

Section: Quantitative Analysismentioning

confidence: 95%

Quantitative Study for the Impact of Fines Content on Soil Surface Cracking

Lü

Chen

et al. 2012

AMR

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Cracking development in soils is of significance for their physical and mechanical properties. The fines content in soils is one of the most important factors in cracking development, leading to it being of great importance to quantitatively study how the cracking development is influenced by the fines content. In this paper, experimental simulations on soil surface cracking were first conducted in the lab with soil from Jiangjia Valley. Digital image processing technology was then applied to investigate cracking in soil with different fines content by describing the surface cracks with crack area density Ac (ratio of all cracks’ area to total surface area of the cracked soil) and crack line density Lc (ratio of all cracks’ perimeters to total surface area of the cracked soil). The conclusions are drawn as follows: 1) Surface cracks increase with fines content going up; specifically, when the soil mass with fines content ranging from 20% to 30%, there is a significant increase in cracks; There is no crack developed in the soil with no fines, comparing to the gradual increase in soils with other fines content. 2) With the loss of water content, Ac and Lc will increase until a constant value is reached. However, small cracks will be closed and big ones will evolve into smaller ones if enough water is added. 3) Soil mass with fines content less than 20% is inclined to have small cracks when it is drying and cracks will be closed if enough water is added; on the other hand, soil mass with fines content more than 20% is inclined to have bigger cracks and they will become smaller when submerged into water. 4) After times of wetting and drying cycles, soil mass shrinks and soil dry density increases, which leads to the decrease of Dc and Lc, which suggests soil with larger dry density will probably have fewer cracks.

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Section: Quantitative Analysismentioning

confidence: 95%

Quantitative Study for the Impact of Fines Content on Soil Surface Cracking

Lü

Chen

et al. 2012

AMR

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“…For the measurement of crack characteristics, early researches focused on manually measuring cracks in the field (Novak, 1999;Ringrose-voase and Sanidad, 1996); with the development of computers, image-processing technology has become increasingly advantageous in extracting crack characteristics because of its rapid, accurate and non-destructive detection. Velde (1999) evaluated the fractal dimension of surface crack patterns in various types of soils using box counting method and found that cultivated soils showed the greatest irregularity for a given porosity; Vogel et al (2005) measured the angle distribution of a crack network and used it to identify the blocks segmented by cracks; Xiong et al (2008) extracted the connectivity index to express the development intensity of soil cracks and describe the morphological complexity of crack patterns quantitatively; Liu et al (2013) developed special software CIAS to extract the geometric characteristics of crack patterns such as crack area, crack length, crack width and crack direction automatically, the software showed a great potential to study the generation and development of soil crack patterns. Although it is known as a very common characteristic to distinguish the surface patterns of objects, the texture feature, however, has never been used to describe the extent of soil cracking.…”

Section: Introductionmentioning

confidence: 99%

Study of an on-line measurement method for the salt parameters of soda-saline soils based on the texture features of cracks

Ren

Zhao

et al. 2016

Geoderma

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“…Adrian et al (2000) stated that soil cracks cause worsening in soil water quality and persuade several significant physical, chemical, and biochemical processes in the soil (Yoshida et al 2004). Studying soil cracks has significant importance in understanding the soil degradation processes and subversive pollution of water and the expansion of re-vegetation practices (Xiong et al 2008). Chertkov (2000) affirmed that crack networks in the soil directly depend upon the hydraulic properties of soil.…”

Section: Introductionmentioning

confidence: 99%

“…However, crack area density and length density determines the connectivity of crack 0 s network (Vogel et al 2005). Xiong et al (2008Xiong et al ( , 2009 studied crack length, width and other morphological characteristics to understand the connectivity and complexity of the soil cracks. Tang et al (2010) established that desiccation cracking patterns crack development through moisture content, stiffness and tensile strength of soil, and base adhesion.…”

Section: Introductionmentioning

confidence: 99%

Soil crack morphology analysis using image processing techniques

Shit¹,

Bhunia²,

Maiti

2015

Model. Earth Syst. Environ.

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The present paper demonstrated an image processing technique of surface soil crack analysis. The geometric features of cracks, such as width, length, and surface area are estimated. These parameters are important, because they influence both the soil hydraulics and mechanics. The crack intensity factor was introduced as a descriptor of the extent of surficial cracking. The correlation analysis indicates that area-weighted mean ratio of soil-crack area to perimeter and index r has a much closed positive relationship with cracks intensity and the area weighted mean of crack fractal dimension declines continuously as the degree of development of soil cracks increases, indicating that the degree of complexity of the soil cracks also gradually decreases. However, traditional visual assessment, which is the primary method in use, is slow and expensive. The present works involve image processing technique for the automatic detection and analysis of cracks in the digital image of a concrete surface.

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Selection of judging indicators for surface morphology of soil crack under different development degrees in Yuanmou arid-hot valley region

Cited by 9 publications

References 12 publications

Quantitative Study for the Impact of Fines Content on Soil Surface Cracking

Quantitative Study for the Impact of Fines Content on Soil Surface Cracking

Study of an on-line measurement method for the salt parameters of soda-saline soils based on the texture features of cracks

Soil crack morphology analysis using image processing techniques

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