Arid
DOI10.1080/01431161.2011.551847
Land cover in Upper Egypt assessed using regional and global land-cover products derived from MODIS imagery
Fuller, Douglas O.1; Parenti, Michael S.2; Gad, Adelm M.3; Beier, John C.2,4
通讯作者Fuller, Douglas O.
来源期刊REMOTE SENSING LETTERS
ISSN2150-704X
EISSN2150-7058
出版年2012
卷号3期号:2页码:171-180
英文摘要

Irrigation along the Nile River has resulted in dramatic changes in the biophysical environment of Upper Egypt. In this study we used a combination of Moderate Resolution Imaging Spectroradiometer (MODIS) 250 m Normalized Difference Vegetation Index data and Landsat imagery to identify areas that changed from 2001 to 2008 as a result of irrigation and water-level fluctuations in the Nile River and nearby waterbodies. We used two different methods of time series analysis principal components analysis (PCA) and harmonic decomposition - applied to the MODIS 250 m Normalized Difference Vegetation Index images to derive simple three-class land-cover maps and then assessed their accuracy using a set of reference polygons derived from 30 m Landsat 5 and 7 imagery. We analysed our MODIS 250 m maps against a new MODIS global land-cover product (MOD12Q1 collection 5) to assess whether regionally specific mapping approaches are superior to a standard global product. Results showed that the accuracy of the PCA-based product was greater than the accuracy of either the harmonic decomposition or MOD12Q1 products for the years 2001, 2003 and 2008. However, the accuracy of the PCA product was only slightly better than the MOD12Q1 for 2001 and 2003. Overall, the results suggest that our PCA-based approach produces a high level of user and producer accuracies, although the MOD12Q1 product also showed consistently high accuracy. Overlay of 2001-2008 PCA-based maps showed a net increase of 12,129 ha of irrigated vegetation, with the largest increase found from 2006 to 2008 around the districts of Edfu and Kom Ombo. This result was unexpected in light of ambitious government plans to develop 336,000 ha of irrigated agriculture around the Toshka Lakes.


类型Article
语种英语
国家USA ; Egypt
收录类别SCI-E
WOS记录号WOS:000292874400009
WOS关键词COMPOSITES ; RESOLUTION ; DESERT ; WATER ; LAKES
WOS类目Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向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/2XILL650/174790
作者单位1.Univ Miami, Dept Geog & Reg Studies, Coral Gables, FL 33124 USA;
2.Univ Miami, Leonard & Jayne Abess Ctr Ecosyst Sci & Policy, Coral Gables, FL 33124 USA;
3.Ain Shams Univ, Dept Entomol, Fac Sci, Cairo 11566, Egypt;
4.Univ Miami, Miller Sch Med, Dept Epidemiol & Publ Hlth, Miami, FL 33136 USA
推荐引用方式
GB/T 7714
Fuller, Douglas O.,Parenti, Michael S.,Gad, Adelm M.,et al. Land cover in Upper Egypt assessed using regional and global land-cover products derived from MODIS imagery[J],2012,3(2):171-180.
APA Fuller, Douglas O.,Parenti, Michael S.,Gad, Adelm M.,&Beier, John C..(2012).Land cover in Upper Egypt assessed using regional and global land-cover products derived from MODIS imagery.REMOTE SENSING LETTERS,3(2),171-180.
MLA Fuller, Douglas O.,et al."Land cover in Upper Egypt assessed using regional and global land-cover products derived from MODIS imagery".REMOTE SENSING LETTERS 3.2(2012):171-180.
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