干旱区生态环境知识资源中心(Arid): Simulation of coupled transport of soil moisture and heat in a typical karst rocky desertification area, Yunnan Province, Southwest China

Arid

DOI	10.1007/s11356-020-10784-2
	Simulation of coupled transport of soil moisture and heat in a typical karst rocky desertification area, Yunnan Province, Southwest China
	Xiong, Xiaofeng; Li, Jianhong; Zhang, Tao; Wang, Sainan; Huo, Weijie
通讯作者	Li, JH
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
EISSN	1614-7499
英文摘要	Understanding the transport processes of soil moisture and heat is critical for vegetation restoration in karst rocky desertification areas where serious soil erosion and extensive exposure of carbonate rocks occur. Numerical simulation can provide an important approach to explore the transport processes of soil moisture and heat, but few studies employing this technique have been carried out in karst rocky desertification areas of southwest China. In this study, a model of coupled soil moisture and heat transport was established using HYDRUS-1D based on the high-resolution data of soil moisture, soil temperature, and meteorological parameters obtained throughout a year in a typical karst rocky desertification area in Yunnan province, southwest China. The modeling results reflect the rainfall-infiltration-evaporation processes in rocky desertification areas well. The frequently rainfall events in small intensity in the study site often induced great variations of soil moisture in the near-surface soil layer (< 1-cm depth). However, soil moisture in deep soil layer (> 10-cm depth) kept stable during light rainfall events, implying that the deep soil was only influenced by heavy rainfall events. The variations of soil temperature showed a high sinusoidal fitting trend. At the annual scale, variations of soil temperature were distinct apparent evident below the depth of 40 cm, but no evident daily variations were observed. The simulated fluxes of soil water showed that the vapor fluxes were lower than the liquid water fluxes by 3-6 orders of magnitude, suggesting the control of soil thermal gradients. Our results also indicate that the vapor flux has great significance for plant water utilization in the drought periods. The simulation errors are small for soil temperature but slightly more significant for the soil moisture in deep soil layer. This primary failure may result from the occurrence of preferential flows at the rock-soil interface, which needed to be further investigated in the future.
英文关键词	Karst rocky desertification area In situ monitoring Soil moisture Soil temperature Numerical simulation
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000571269500012
WOS关键词	HYDRAULIC CONDUCTIVITY ; SPATIAL VARIABILITY ; LOESS PLATEAU ; WATER-FLOW ; TEMPERATURE ; MODEL ; DYNAMICS ; PROFILE ; EVAPORATION ; CATCHMENTS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328257
作者单位	[Xiong, Xiaofeng; Li, Jianhong; Zhang, Tao; Wang, Sainan; Huo, Weijie] Chinese Acad Geol Sci, Inst Karst Geol, Key Lab Karst Dynam, MNR & Guangxi, 50 Qixing Ave, Qixing Dist 541004, Guilin, Peoples R China; [Xiong, Xiaofeng] Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Xiong, Xiaofeng,Li, Jianhong,Zhang, Tao,et al. Simulation of coupled transport of soil moisture and heat in a typical karst rocky desertification area, Yunnan Province, Southwest China[J].
APA	Xiong, Xiaofeng,Li, Jianhong,Zhang, Tao,Wang, Sainan,&Huo, Weijie.
MLA	Xiong, Xiaofeng,et al."Simulation of coupled transport of soil moisture and heat in a typical karst rocky desertification area, Yunnan Province, Southwest China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH