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DOI	10.1016/j.pce.2019.102810
	An assessment of groundwater use in irrigated agriculture using multi-spectral remote sensing
	Nhamo, Luxon 1,2; Ebrahim, Girma Yimer 1; Mabhaudhi, Tafadzwanashe 2; Mpandeli, Sylvester 3,7; Magombeyi, Manuel 1; Chitakira, Munyaradzi 4; Magidi, James 5; Sibanda, Mbulisi 6
通讯作者	Nhamo, Luxon
来源期刊	PHYSICS AND CHEMISTRY OF THE EARTH
ISSN	1474-7065
EISSN	1873-5193
出版年	2020
卷号	115
英文摘要	Declining water resources in dry regions requires sustainable groundwater management as trends indicate increasing groundwater use, but without accountability. The sustainability of groundwater is uncertain, as little is known about its extent and availability, a challenge that requires a quantitative assessment of its current use. This study assessed groundwater use for irrigated agriculture in the Venda-Gazankulu area of Limpopo Province in South Africa using crop evapotranspiration and irrigated crop area derived from the normalised difference vegetation index (NDVI). Evapotranspiration data was derived from the Water Productivity through Open access of Remotely sensed Actual Evapotranspiration and Interception (WaPOR) dataset (250 m resolution), and irrigated areas were characterised using dry season NDVI data derived from Landsat 8. Field surveys were conducted for four years to assess accuracy and for post-classification correction. Daily ET for the dry season (May to September) was developed from the actual ET for the irrigated areas. The irrigated areas were overlaid on the ET map to calculate ET for only irrigated land parcels. Groundwater use during the 2015 dry period was 3627.49 billion m(3) and the irrigated area during the same period was 26% of cultivated land. About 82 435 ha of cultivated area was irrigated using 44 million m(3)/ha of water, compared to 186.93 million m(3)/ha on a rainfed area of 237 847 ha. Groundwater management is essential for enhancing resilience in arid regions in the advent of water scarcity.
英文关键词	Climate change Groundwater Remote sensing Resilience Water management Water productivity
类型	Article
语种	英语
国家	South Africa
收录类别	SCI-E
WOS记录号	WOS:000517961300002
WOS关键词	LAND-SURFACE ; EVAPOTRANSPIRATION PRODUCTS ; MANAGEMENT ; WATER ; VALIDATION ; MOD16
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/2XILL650/315312
作者单位	1.IWMI SA, 141 Cresswell St,Weavind Pk,P Bag X 813, ZA-0184 Pretoria, South Africa; 2.Univ KwaZulu Natal, Ctr Transformat Agr & Food Syst, Sch Agr Earth & Environm Sci, P Bag X01, ZA-3209 Pietermaritzburg, South Africa; 3.Water Res Commiss South Africa, 4 Daventry St, ZA-0081 Pretoria, South Africa; 4.Univ South Africa UNISA, Dept Environm Sci, Private Bag X6, ZA-1710 Johannesburg, South Africa; 5.Tshwane Univ Technol, Geomat Dept, Staatsartillerie Rd, ZA-0001 Pretoria, South Africa; 6.Univ KwaZulu Natal, Sch Agr Earth & Environm Sci, Dept Geog & Environm Sci, P Bag X01, ZA-3209 Scottsville, South Africa; 7.Univ Venda, Sch Environm Sci, Private Bag X 5050, ZA-0950 Thohoyandou, South Africa
推荐引用方式 GB/T 7714	Nhamo, Luxon,Ebrahim, Girma Yimer,Mabhaudhi, Tafadzwanashe,et al. An assessment of groundwater use in irrigated agriculture using multi-spectral remote sensing[J],2020,115.
APA	Nhamo, Luxon.,Ebrahim, Girma Yimer.,Mabhaudhi, Tafadzwanashe.,Mpandeli, Sylvester.,Magombeyi, Manuel.,...&Sibanda, Mbulisi.(2020).An assessment of groundwater use in irrigated agriculture using multi-spectral remote sensing.PHYSICS AND CHEMISTRY OF THE EARTH,115.
MLA	Nhamo, Luxon,et al."An assessment of groundwater use in irrigated agriculture using multi-spectral remote sensing".PHYSICS AND CHEMISTRY OF THE EARTH 115(2020).