Prediction of sediment transport capacity using thawed depth deduced from temperature measurement

doi:10.1016/j.still.2020.104858

	Prediction of sediment transport capacity using thawed depth deduced from temperature measurement
	Shi, Chen 1,2; Ban, Yunyun 1; Tang, Qiuhong 1
刊名	SOIL & TILLAGE RESEARCH
	2021-03-01
卷号	207 页码:9
关键词	Soil temperature Thawed soil depth Model deduction Meltwater erosion Sediment transport capacity
ISSN号	0167-1987
DOI	10.1016/j.still.2020.104858
通讯作者	Ban, Yunyun(banyy@igsnrr.ac.cn)
英文摘要	In cold regions, changes in thawed soil depth induced by temperature fluctuation are commonly observed and can affect sediment transport capacity of meltwater flow and erosion processes. In this paper, a method based on laboratory experiment was proposed to predict sediment transport capacity using the thawed soil depth derived from temperature at different soil depths measured during the experimental time period. A saturated soil column with platinum resistance sensors at depths of 5, 10, 15, 20, and 25 cm from the soil surface was placed in a freezer at -25, -20, and -15 degrees C until it was totally frozen and then placed in an incubator with a constant temperature of 25, 30, and 35 degrees C. The thawing processes of the frozen soil column were monitored by the sensors that measured temperature during the experimental time. Based on soil heat conduction mechanism, the relations among soil depth, temperature, and time were deduced as a function to predict thawed soil depth giving the frozen temperature, soil temperature inside the incubator, and time after being placed in the incubator. The sediment transport capacity was then calculated by combining the deduced thawed soil depth function and an existing model. The predicted sediment transport capacity was compared with laboratory measurements in literatures. The results show that the model has the ability of predicting sediment transport capacity ranged from 0.019 to 0.598 kg s(-1) m(-1) with high R-2 of 0.99 and 0.98. It suggests that the proposed model can be used to predict the sediment transport capacity by concentrated meltwater flow on different thawed soil slope. This research contributes to our understanding of soil erosion processes by meltwater on partially thawed soil slope.
资助项目	National Natural Science Foundation of China[42007060] ; National Natural Science Foundation of China[41730645] ; China Scholarship Council[201706350231] ; China Scholarship Council[201706350224]
WOS关键词	UNFROZEN WATER-CONTENT ; FREEZE-THAW ; MELTWATER EROSION ; CLIMATE-CHANGE ; SOIL-EROSION ; FROZEN SOILS ; CLAY ; STRENGTH ; IMPACTS ; CYCLES
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000603542500004
资助机构	National Natural Science Foundation of China ; China Scholarship Council
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/136581]
专题	中国科学院地理科学与资源研究所
通讯作者	Ban, Yunyun
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.China Agr Univ, Coll Engn, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Shi, Chen,Ban, Yunyun,Tang, Qiuhong. Prediction of sediment transport capacity using thawed depth deduced from temperature measurement[J]. SOIL & TILLAGE RESEARCH,2021,207:9.
APA	Shi, Chen,Ban, Yunyun,&Tang, Qiuhong.(2021).Prediction of sediment transport capacity using thawed depth deduced from temperature measurement.SOIL & TILLAGE RESEARCH,207,9.
MLA	Shi, Chen,et al."Prediction of sediment transport capacity using thawed depth deduced from temperature measurement".SOIL & TILLAGE RESEARCH 207(2021):9.