干旱区生态环境知识资源中心(Arid): Impacts of land-use changes and landholding fragmentation on crop water demand and drought in Wadi El-Farigh, New Delta project, Egypt

Arid

DOI	10.1016/j.ejrs.2022.08.002
	Impacts of land-use changes and landholding fragmentation on crop water demand and drought in Wadi El-Farigh, New Delta project, Egypt
	Elsharkawy, Mohamed M.; Nabil, Mohsen; Farg, Eslam; Arafat, Sayed M.
通讯作者	Arafat, SM
来源期刊	EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES
ISSN	1110-9823
EISSN	2090-2476
出版年	2022
卷号	25 期号:3 页码:873-885
英文摘要	Despite Egypt's limited water resources, more lands in the western desert of the Nile Delta are currently being reclaimed to increase the agricultural area to feed its fast-growing population and provide jobs for new generations. These reclaimed lands are prone to drought since they are located in arid regions with limited water resources for irrigation. Moreover, a high rate of landholdings fragmentation was observed with the migration of large numbers of new farmers to the newly reclaimed areas. Hence, the current work uses remote sensing data to investigate the impacts of landholdings fragmentation and land-use changes on irrigation water demand and drought propagation in two selected sites in Wadi El-Farigh area, one of the newly reclaimed valleys in the western desert of Egypt. To achieve that goal, high -resolution satellite images were used to quantify the land-use changes and patterns. The Surface Energy Balance System (SEBS) was used to estimate the actual evapotranspiration (ETa) from 2010 to 2020. Standardized Precipitation Index (SPI) and Evaporative Stress Index (ESI) were used to monitor drought. Results indicated a large transformation of seasonal herbaceous crops to tree-fruit crops in the two study sites. However, landholding fragmentation caused a reduction in the total cultivated area and thus the accumulated water consumption over one study site. Although the accumulated ETa decreased following the decline in the total cultivated area, the ETa rate per hectare increased by 18.4% and 19.6% for trees and herbaceous crops, respectively, reflecting the negative impact of climate change. ESI and SPI time series confirms that the area became extremely dry, particularly after 2017. In conclusion, land use and climate change increased crop water demand, while landholding fragmenta-tion led to cropland loss. Hence, more policies for land protection and adaptation strategies to climate change are essentially needed.(c) 2022 Published by Elsevier B.V. on behalf of National Authority of Remote Sensing & Space Science. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/).
英文关键词	Land use mapping Climate change Water stress Remote sensing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000856263500003
WOS关键词	ENERGY-BALANCE ; MANAGEMENT ; DESERT
WOS类目	Environmental Sciences ; Remote Sensing
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392396
推荐引用方式 GB/T 7714	Elsharkawy, Mohamed M.,Nabil, Mohsen,Farg, Eslam,et al. Impacts of land-use changes and landholding fragmentation on crop water demand and drought in Wadi El-Farigh, New Delta project, Egypt[J],2022,25(3):873-885.
APA	Elsharkawy, Mohamed M.,Nabil, Mohsen,Farg, Eslam,&Arafat, Sayed M..(2022).Impacts of land-use changes and landholding fragmentation on crop water demand and drought in Wadi El-Farigh, New Delta project, Egypt.EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES,25(3),873-885.
MLA	Elsharkawy, Mohamed M.,et al."Impacts of land-use changes and landholding fragmentation on crop water demand and drought in Wadi El-Farigh, New Delta project, Egypt".EGYPTIAN JOURNAL OF REMOTE SENSING AND SPACE SCIENCES 25.3(2022):873-885.