干旱区生态环境知识资源中心(Arid): Monitoring and assessment of the seasonal and inter-annual pan inundation dynamics in the Kgalagadi Transfrontier Park, Southern Africa

Arid

DOI	10.1016/j.pce.2020.102905
	Monitoring and assessment of the seasonal and inter-annual pan inundation dynamics in the Kgalagadi Transfrontier Park, Southern Africa
	Chiloane, Chantel; Dube, Timothy; Shoko, Cletah
通讯作者	Chiloane, C
来源期刊	PHYSICS AND CHEMISTRY OF THE EARTH
ISSN	1474-7065
EISSN	1873-5193
出版年	2020
卷号	118
英文摘要	In arid regions, pans form a critical water source that supports local communities, livestock, and wildlife, with readily available water resources. However, these waterbodies are unevenly distributed across the landscape and highly ephemeral and this influences their ability to provide water, especially in remote and water scarce areas. In addition, it remains difficult, impractical, and costly to monitor their variability using traditional hydrometric networks. In this regard, their contribution as water sources remains uncertain. The availability of spatially explicit data, with improved sensor design characteristics such as Landsat-8 enables the monitoring of their surface water extent over space and time. This study therefore, for the first time investigated the potential of using Landsat-8 in detecting and monitoring the spatial and temporal dynamics of pan inundation in the water scarce region of Kgalagadi in Southern Africa between 2016 and 2018. This was achieved by testing the performance of multiple indices, namely; the Normalised Difference Water Index (NDWI), Modified Normalised Difference Water Index (MNDWI), Automated Water Extraction Index for Shadow (AWEIsh), Water Ratio Index (WRI) and Land Surface Water Index (LSWI). Overall, the results have shown the potential of remote sensing data to monitor pan inundation. The MNDWI produced the highest overall classification accuracy of 84.91% comparatively. The MNDWI was then used for monitoring and assessing pan inundation dynamics over different seasons between 2016 and 2018. During the study period, pan inundation varied significantly (alpha = 0.05) for different seasons. Nevertheless, 2017 had the largest surface water extent covering 23 195.8 m(2), during the wet season and 17 913.3 m(2) in the dry season. On the other hand, 2018 showed the smallest spatial coverage of 13 076 m(2) for the wet season and 6032.587 m(2) during the dry season. The observed spatial variability in pan inundation was attributed to rainfall and temperature variability. The study thus revealed the utility of remotely sensed data sets in providing a more robust approach for monitoring seasonal and inter-annual pan inundation variations in semi-arid environments of Southern Africa. This information is important for water management decision making, specifically for water-limited areas, to conserve these water sources to ensure their sustainability in supporting local communities, livestock and wildlife population.
英文关键词	Endorheic pans Livelihoods MNDWI Remote sensing Surface water availability Water resources management Wildlife/livestock conservation
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000575782800009
WOS关键词	HWANGE NATIONAL-PARK ; WATER INDEX NDWI ; CLASSIFICATION ; AVAILABILITY ; HERBIVORES ; VEGETATION ; RAINFALL ; FEATURES ; DELTA ; CAPE
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326655
作者单位	[Chiloane, Chantel; Dube, Timothy] Univ Western Cape, Dept Earth Sci, Private Bag X17, ZA-7535 Bellville, South Africa; [Shoko, Cletah] Univ Witwatersrand, Sch Geog Archaeol & Environm Studies, Div Geog, Private Bag 3, ZA-2050 Johannesburg, South Africa
推荐引用方式 GB/T 7714	Chiloane, Chantel,Dube, Timothy,Shoko, Cletah. Monitoring and assessment of the seasonal and inter-annual pan inundation dynamics in the Kgalagadi Transfrontier Park, Southern Africa[J],2020,118.
APA	Chiloane, Chantel,Dube, Timothy,&Shoko, Cletah.(2020).Monitoring and assessment of the seasonal and inter-annual pan inundation dynamics in the Kgalagadi Transfrontier Park, Southern Africa.PHYSICS AND CHEMISTRY OF THE EARTH,118.
MLA	Chiloane, Chantel,et al."Monitoring and assessment of the seasonal and inter-annual pan inundation dynamics in the Kgalagadi Transfrontier Park, Southern Africa".PHYSICS AND CHEMISTRY OF THE EARTH 118(2020).