Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3390/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
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ISSN | 2072-4292 |
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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