کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8893773 | 1629192 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Micro-characteristics of soil aggregate breakdown under raindrop action
ترجمه فارسی عنوان
ویژگی های میکروارگانیسم تجزیه خاک در اثر
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کلمات کلیدی
چلپ چلوپ، تجزیه خاک کلیه، ویژگی های میکرو، مهر و موم سطح شاخص شکل مجموع،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
چکیده انگلیسی
Raindrop splash is considered to be the first step in soil erosion, and it is also a contribution to such erosion. Aggregate breakdown due to raindrop splash causes crusting and soil erosion. In this study, the micro-characteristics of soil aggregate breakdown under the action of three sizes of raindrops were examined using synchrotron-based X-ray micro-computed tomography (SR-μ CT). The results showed that soil aggregate breakdown was related to the size of raindrops, was mainly caused by large raindrops during a rainfall event, and formed an enrichment zone, transition zone, and dense airtight zone of aggregates in the surface soil. The shape index and the amount of aggregate in the splashed soil was higher than in the un-splashed soil, especially for micro-aggregate fragments (< 25 μm). We confirm that the existence of large amounts of micro-aggregate fragments surrounding large aggregates in a rainfall event is a principle factor in the formation of soil surface seals and the clogging of pores.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: CATENA - Volume 162, March 2018, Pages 354-359
Journal: CATENA - Volume 162, March 2018, Pages 354-359
نویسندگان
Guanglu Li, Yu Fu, Baiqiao Li, Tenghui Zheng, Faqi Wu, Guanyun Peng, Tiqiao Xiao,