| Autor: |
YANG Chang, WANG Jian, LI Jiande, XU Feifei |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Guan'gai paishui xuebao, Vol 40, Iss 10, Pp 103-108 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1672-3317 |
| DOI: |
10.13522/j.cnki.ggps.2021139 |
| Popis: |
【Objective】 Crust is a thin soil layer formed on soil surface when water on the soil surface recedes; continuing soil drying after that could result in cracks to develop. Crusts and cracks could significantly affect water infiltration and soil water evaporation, and the purpose of this paper is to experimentally study how crusts form and cracks subsequently develop following a rainfall on a slope. 【Method】 The experiment was conducted on a slope watered by artificial rainfall. After the rainfall stopped, we measured physical properties of the crusts, imaged the initiation and development of cracks in them at different locations on the slop. These images were processed using MATLAB to quantify their morphological characteristics as well as their relationship with soil water content. 【Result】 Based on where the crusts were formed, they can be classified into structural crusts, depositional crusts and transitional crusts, with different physical properties. The depositional crusts have the highest volumetric weight and clay content. In contrast, the structural crusts have the greatest sand particle content. The morphology of cracks developed in the crusts at different locations in the gully differed from each other significantly. For crusts where the cracks developed, their impacts on crack area ratio (RC), length density of the cracks (LC), and the average width of the crack (Wi) were ranked in the order of depositional crusts |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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