干旱区生态环境知识资源中心(Arid): Investigating the Spatio-Temporal dynamics in the soil water storage in Alberta's Agricultural region

Arid

DOI	10.1016/j.jhydrol.2020.125104
	Investigating the Spatio-Temporal dynamics in the soil water storage in Alberta's Agricultural region
	Agboma, Clement; Itenfisu, Daniel
通讯作者	Agboma, C
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	588
英文摘要	Anomalous atmospheric conditions which, for the most part, manifest in the form of heavy precipitation events leading to the generation of pluvial or fluvial flooding in some years, or as extended extreme dry spells resulting in the development of severe drought conditions in other years has significant implications for subsurface moisture budgets in regional and local catchments in the Canadian Prairies. The myriad implications of these frequent and extended dry spells over Alberta's Agricultural Region can be far reaching economically, socially and otherwise, thereby exerting substantial negative toll on agricultural productivity (crop cultivation, livestock husbandry, and pasture management) within the Province. Soil moisture dynamics both in spatial and temporal scales has critical implications for agricultural water management especially under semi-arid climate conditions that are typical of the local- and regional-scale catchments in southern Alberta. This study is focused on the assessment of the observations of the soil water storage, soil temperature and meteorological variables (precipitation and air temperature) acquired from 39 monitoring stations spanning a 12-year period with the principal objective of examining the spatial and temporal dynamics in the shallow and deep soil water storage processes across the study domain. This study revealed that the moisture anomalies in the deep soil moisture store exhibit the longest hydrologic memory relative to those in the shallow and intermediate soil moisture storages as well as those in the meteorological variables across the study domain. The anomalies computed for the soil moisture measurements undertaken in the deep soil moisture store revealed frequency features that are dominant at seasonal cycle (9-month) and at a higher periodicity of 32-month cycle. This low-frequency feature (32-month cycle) is evidently non-existent in the soil water storage measured at the shallower soil depths nor in the meteorological variables evaluated in this study. This implies that the low-frequency feature of the soil water storage wavelet spectra increases with increasing soil depth across the Agricultural Region; indicating that at deeper soil depths, the largest variances are shifted to lower frequencies. This observed dominant long-memory feature in the deep soil moisture store could have important implications for characterizing the development of temperature extremes as well as for the evaluation of the severity of the recurrent drought outbreaks over regional watersheds in Alberta and potentially for other Canadian Prairie catchments.
英文关键词	Soil water storage Continuous wavelet transform Hydrologic memory Autocorrelation function Canadian prairies
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000568826300054
WOS关键词	MOISTURE ; VARIABILITY ; WETNESS
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326247
作者单位	[Agboma, Clement] Alberta Environm & Pk, Policy & Planning Div, 9915-108th St, Edmonton, AB, Canada; [Itenfisu, Daniel] Alberta Agr & Forestry, Environm Stewardship Branch, Edmonton, AB, Canada
推荐引用方式 GB/T 7714	Agboma, Clement,Itenfisu, Daniel. Investigating the Spatio-Temporal dynamics in the soil water storage in Alberta's Agricultural region[J],2020,588.
APA	Agboma, Clement,&Itenfisu, Daniel.(2020).Investigating the Spatio-Temporal dynamics in the soil water storage in Alberta's Agricultural region.JOURNAL OF HYDROLOGY,588.
MLA	Agboma, Clement,et al."Investigating the Spatio-Temporal dynamics in the soil water storage in Alberta's Agricultural region".JOURNAL OF HYDROLOGY 588(2020).