Arid
DOI10.1111/wej.12513
Mechanisms of soil moisture availability in vadose zone of a sand dune system: Linking soil physical properties and rainfall patterns
Zhou, Hong1,2; Zhao, Wen Zhi1,2
通讯作者Zhao, Wen Zhi
来源期刊WATER AND ENVIRONMENT JOURNAL
ISSN1747-6585
EISSN1747-6593
出版年2020
卷号34页码:139-157
英文摘要Sand dune systems in the arid region of north-western China are maintained by sand-stabilizing vegetation, which provides critical ecosystem services. Limited knowledge of soil moisture recharge in these systems hinders sand stabilization efforts. To increase the understanding of soil moisture response to rainfall, we analysed soil water transport in the desert vadose zone of sand dunes and dune slacks following four natural rainfall events during the growing season of 2017. Rainfall was dominated by small rain events (<5.0 mm), accounting for 58% of total rainfall events. Soil moisture at 5-25 cm depth in dune slacks was significantly higher and more variable to 60 cm depth than in sand dunes. Soil moisture at 5 cm depth was replenished with rainfall amounts of <5 mm in dune slacks, but not in sand dunes. When rainfall amount reached 20 mm, soil moisture in dune slack and in sand dune increased, but was much higher in dune slack than in sand dune at depth of 5 cm; after the rain, soil moisture remained at a relatively high level in dune slack but not in sand dune. This was possible because dune slacks had higher silt contents and root biomass, which played a key role in improving soil water holding capacity or accelerating rainfall infiltration at 0-25 cm depth. Overall, the rainfall-driven hydrological regime coupled with soil physical factors regulated spatial and temporal variability of soil moisture in a sand dune system.
英文关键词dry climates dune slack rainfall infiltration sand dune soil moisture availability
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000483991400001
WOS关键词DESERT-OASIS ECOTONE ; HYDRAULIC CONDUCTIVITY ; HALOXYLON-AMMODENDRON ; LAND DESERTIFICATION ; PRECIPITATION PULSES ; PLANT-RESPONSES ; INNER-MONGOLIA ; LOESS PLATEAU ; HEXI CORRIDOR ; WATER
WOS类目Environmental Sciences ; Limnology ; Water Resources
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/219262
作者单位1.Chinese Acad Sci, Linze Inland River Basin Res Stn, Key Lab Inland River Basin Ecohydrol, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China;
2.Univ Chinese Acad Sci, Beijing, Peoples R China
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Zhou, Hong,Zhao, Wen Zhi. Mechanisms of soil moisture availability in vadose zone of a sand dune system: Linking soil physical properties and rainfall patterns[J],2020,34:139-157.
APA Zhou, Hong,&Zhao, Wen Zhi.(2020).Mechanisms of soil moisture availability in vadose zone of a sand dune system: Linking soil physical properties and rainfall patterns.WATER AND ENVIRONMENT JOURNAL,34,139-157.
MLA Zhou, Hong,et al."Mechanisms of soil moisture availability in vadose zone of a sand dune system: Linking soil physical properties and rainfall patterns".WATER AND ENVIRONMENT JOURNAL 34(2020):139-157.
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