Arid
DOI10.3390/rs10101541
Detecting Areas Vulnerable to Sand Encroachment Using Remote Sensing and GIS Techniques in Nouakchott, Mauritania
Gomez, Diego; Salvador, Pablo; Sanz, Julia; Casanova, Carlos; Luis Casanova, Jose
通讯作者Gomez, Diego
来源期刊REMOTE SENSING
ISSN2072-4292
出版年2018
卷号10期号:10
英文摘要

Sand dune advances poses a major threat to inhabitants and local authorities in the area of Nouakchott, Mauritania. Despite efforts to control dune mobility, accurate and adequate local studies are still needed to tackle sand encroachment. We have developed a Sand Dune Encroachment Vulnerability Index (SDEVI) to assess Nouakchott’s vulnerability to sand dune encroachment. Said index is based on the geo-physical characteristics of the area (wind direction and intensity, slope and surface height, land use, vegetation or soil properties) with Geographic Information System (GIS) techniques that can support local authorities and decision-makers in implementing preventive measures or reducing impact on the population and urban infrastructures. In order to validate this new index, we use two remote sensing approaches: optical-Sentinel 2 and Synthetic Aperture Radar (SAR)-Sentinel 1 data. Results show that the greatest vulnerability is located in the north-eastern part of Nouakchott, where local conditions favor the advance of sand in the city, although medium to high values are also found in the eastern part. Optical images enabled us to distinguish desert sand using the ratio between near infrared/blue bands, and SAR Coherence Change Detection (CCD) imagery was used to assess the degree of stability of those sand bodies. The nature of the SDEVI index allows us to currently assess which areas are vulnerable to sand encroachment since we use long data records. Nevertheless, optical and SAR remote sensing allow sand evolution to be monitored on a near real-time basis.


英文关键词coherence change detection GIS preventive measures sand encroachment vulnerability
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000448555800041
WOS关键词WESTERN DESERT ; INNER-MONGOLIA ; DUNES ; MIGRATION ; PATTERNS ; MODEL ; LAND ; REFLECTANCE ; MOBILITY ; DROUGHT
WOS类目Remote Sensing
WOS研究方向Remote Sensing
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/212651
作者单位Univ Valladolid, Remote Sensing Lab LATUV, Paseo Belen 11, E-47011 Valladolid, Spain
推荐引用方式
GB/T 7714
Gomez, Diego,Salvador, Pablo,Sanz, Julia,et al. Detecting Areas Vulnerable to Sand Encroachment Using Remote Sensing and GIS Techniques in Nouakchott, Mauritania[J],2018,10(10).
APA Gomez, Diego,Salvador, Pablo,Sanz, Julia,Casanova, Carlos,&Luis Casanova, Jose.(2018).Detecting Areas Vulnerable to Sand Encroachment Using Remote Sensing and GIS Techniques in Nouakchott, Mauritania.REMOTE SENSING,10(10).
MLA Gomez, Diego,et al."Detecting Areas Vulnerable to Sand Encroachment Using Remote Sensing and GIS Techniques in Nouakchott, Mauritania".REMOTE SENSING 10.10(2018).
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