干旱区生态环境知识资源中心(Arid): Impacts of groundwater and climate variability on terrestrial groundwater dependent ecosystems: a review of geospatial assessment approaches and challenges and possible future research directions

Arid

DOI	10.1080/10106049.2021.1948108
	Impacts of groundwater and climate variability on terrestrial groundwater dependent ecosystems: a review of geospatial assessment approaches and challenges and possible future research directions
	Chiloane, Chantel; Dube, Timothy; Shoko, Cletah
通讯作者	Chiloane, C (corresponding author), Univ Western Cape, Dept Earth Sci, Bellville, South Africa.
来源期刊	GEOCARTO INTERNATIONAL
ISSN	1010-6049
EISSN	1752-0762
出版年	2021-06
英文摘要	Terrestrial groundwater dependent vegetation (TGDV) are crucial ecosystems which provide important goods and services such as carbon sequestration, habitat, water purification and aesthetic benefits in semi-arid environments. Global climate change and anthropogenic impacts on surface water resources have led to increased competing claims on groundwater resources to meet an exponential water demand for environmental needs, agricultural and developmental needs. This has led to the unsustainable exploitation of groundwater resources, resulting in groundwater table declines, threatening the sustainability of TGDV. It is on this premise that the review aims to provide a detailed overview on the progress in remote sensing of TGDV. More specifically, the paper provides a background on TGDV and threats, and then further explores recent knowledge on vegetation response to groundwater variability and climate change impacts on TGDV. This review also focuses on recent progress in remote sensing and geographic information systems (GIS) based techniques for mapping and monitoring of TGDV and explores the available satellite products and delineation techniques. Finally, the challenges of remote sensing and future research direction are explored. To date, research on TGDV has gained considerable interest with the year 2020 resulting in the most scientific journal publications. Of significant importance is an increase in studies integrating field measurements, model-based techniques with remotely sensed estimates. Despite this progress, only 0.06% of groundwater dependent ecosystems (GDE) research has utilized remote sensing techniques in the past 20 years, with the top three publishing countries namely, Australia, USA, and China. The literature reveals that TDGV are highly heterogenous, complex ecosystems with unique responses to varying groundwater levels. The vegetation responses differ with the landscape, vegetation type, and seasonality at specific groundwater table thresholds. Despite significant progress in TGDV scientific research, further remote sensing studies are required to understand the annual and inter-annual vegetation response to groundwater variability at local scales. Further, climate impacts are difficult to discriminate from other influences such as disturbances, management, and anthropogenic activities. Moreover, new generation remote sensing products integrated with machine learning techniques have the potential to improve TGDV delineation. Despite these challenges, the development of cloud computing technologies such as google earth engine (GEE) and artificial intelligence (AI) provide advanced computer-processing capabilities for long-term monitoring and integration of multi-source datasets required to capture the effects of climate and groundwater variability on TGDV.
英文关键词	Arid environments cloud computing groundwater resources satellite data vegetation responses
类型	Review ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000673827400001
WOS关键词	SUPPORT VECTOR MACHINE ; SOUTH-WESTERN CAPE ; RESOURCE-MANAGEMENT ; VEGETATION CHANGES ; SEMIARID REGION ; NEURAL-NETWORKS ; WATER ; LANDSAT ; CLASSIFICATION ; RIPARIAN
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/367525
作者单位	[Chiloane, Chantel; Dube, Timothy] Univ Western Cape, Dept Earth Sci, Bellville, South Africa; [Shoko, Cletah] Univ Witwatersrand, Sch Geog Archaeol & Environm Studies, Div Geog, Johannesburg, South Africa
推荐引用方式 GB/T 7714	Chiloane, Chantel,Dube, Timothy,Shoko, Cletah. Impacts of groundwater and climate variability on terrestrial groundwater dependent ecosystems: a review of geospatial assessment approaches and challenges and possible future research directions[J],2021.
APA	Chiloane, Chantel,Dube, Timothy,&Shoko, Cletah.(2021).Impacts of groundwater and climate variability on terrestrial groundwater dependent ecosystems: a review of geospatial assessment approaches and challenges and possible future research directions.GEOCARTO INTERNATIONAL.
MLA	Chiloane, Chantel,et al."Impacts of groundwater and climate variability on terrestrial groundwater dependent ecosystems: a review of geospatial assessment approaches and challenges and possible future research directions".GEOCARTO INTERNATIONAL (2021).