气候变化领域集成服务门户(CCPortal): Mosaic desert pavement influences water infiltration and vegetation distribution on fluvial fan surfaces

CCPortal

DOI	10.1002/hyp.14373
	Mosaic desert pavement influences water infiltration and vegetation distribution on fluvial fan surfaces
	Wang, Dejin; Zhao, Wenzhi; Zhou, Hong; Luo, Weicheng; Liu, Hu
通讯作者	Zhao, WZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0885-6087
EISSN	1099-1085
卷号	35 期号:9
英文摘要	Desert pavements (DPs) are critical for maintaining ecological stability and promoting near-surface hydrological cycling in arid regions. However, few studies have focused on eco-hydrological processes of DPs in the ecological systems of fluvial fans. Although DP surfaces appear to be barren and flat, we found that the surfaces are characterized by surface mosaic patterns of desert pavement (mosaic DP) and bare ground (mosaic BG). We investigated the effects of mosaic DP on water infiltration and vegetation distribution at six sites in fluvial fans (one on a hillside and five within the sectors of fans) along a southwest belt transect in northern Linze County, in the central Hexi Corridor (China). We found significant differences in mosaic DP between the hillside and sector sites in terms of pavement thickness and vesicular horizon thickness (Av thickness), particle composition, and bulk density, although significant differences were absent for mass soil water content, gravel coverage, and surface gravel size. The mosaic DP inhibited water infiltration by the pavement layer, where the sorptivity (S), initial infiltration rate (i(int)), steady-state infiltration rate (i(sat)) and infiltration time (T) averaged 1.19 cm/min(-0.5), 0.64 cm/min, 0.13 cm/min and 12.76 min, respectively. Where the pavement layer was scalped, the S, i(int), and i(sat) increased by 0.27 cm/min(-0.5), 0.52 cm/min, and 0.40 cm/min, respectively, and the T reduced by 7.42 min. Water infiltration was mainly controlled by the pavement layer thickness (+), Av thickness (-), surface gravel coverage (-), fine earth (+) and fine gravel (-) in the pavement layer. The DP surfaces only had a sparse covering of shrubs, but an abundance of herbs. Few shrubs were present on the mosaic DP, but a greater number of shrubs and herbs grew on the mosaic BG. It can be concluded that DPs can maintain vegetation stability for different surface mosaic patterns. This study deepens our understanding of the eco-hydrological cycle of DP landscapes in arid regions.
关键词	MOJAVE DESERT HYDRAULIC-PROPERTIES STONE PAVEMENTS LANDSCAPE COVER HILLSLOPE POSITION PLATEAU SOILS SIZE
英文关键词	desert pavement; fluvial fan; mosaic surface; vegetation distribution; water infiltration
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:000700789300012
来源期刊	HYDROLOGICAL PROCESSES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253742
作者单位	[Wang, Dejin; Zhao, Wenzhi; Luo, Weicheng; Liu, Hu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, 320 Donggang West Rd, Lanzhou 730000, Peoples R China; [Wang, Dejin; Zhao, Wenzhi; Luo, Weicheng; Liu, Hu] Chinese Ecosyst Res Network, Linze Inland River Basin Res Stn, Lanzhou, Peoples R China; [Wang, Dejin] Univ Chinese Acad Sci, Beijing, Peoples R China; [Zhou, Hong] Northwest Normal Univ, Tourism Coll, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Wang, Dejin,Zhao, Wenzhi,Zhou, Hong,et al. Mosaic desert pavement influences water infiltration and vegetation distribution on fluvial fan surfaces[J]. 中国科学院西北生态环境资源研究院,2021,35(9).
APA	Wang, Dejin,Zhao, Wenzhi,Zhou, Hong,Luo, Weicheng,&Liu, Hu.(2021).Mosaic desert pavement influences water infiltration and vegetation distribution on fluvial fan surfaces.HYDROLOGICAL PROCESSES,35(9).
MLA	Wang, Dejin,et al."Mosaic desert pavement influences water infiltration and vegetation distribution on fluvial fan surfaces".HYDROLOGICAL PROCESSES 35.9(2021).