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Remote Sens. 2016, 8(7), 590; doi:10.3390/rs8070590

Analysis and Mapping of the Spectral Characteristics of Fractional Green Cover in Saline Wetlands (NE Spain) Using Field and Remote Sensing Data

1
Agrifood Research & Technology Center of Aragon (CITA), EEAD-CSIC Associated Unit, Ave. Montañana 930, 50059 Zaragoza, Spain
2
Estación Experimental de Aula Dei, EEAD-CSIC, Ave. Montañana 1005, 50059 Zaragoza, Spain
3
Centre d’Etudes Spatiales de la Biosphère, (CESBIO), Université de Toulouse, CNES/CNRS/IRD/UPS, 18 Av. Eduard Belin, 31401 CEDEX 9 Toulouse, France
*
Author to whom correspondence should be addressed.
Academic Editors: Javier Bustamante, Alfredo R. Huete, Patricia Kandus, Ricardo Díaz-Delgado, Clement Atzberger and Prasad S. Thenkabail
Received: 29 February 2016 / Revised: 13 June 2016 / Accepted: 7 July 2016 / Published: 13 July 2016
(This article belongs to the Special Issue What can Remote Sensing Do for the Conservation of Wetlands?)
View Full-Text   |   Download PDF [11262 KB, uploaded 13 July 2016]   |  

Abstract

Inland saline wetlands are complex systems undergoing continuous changes in moisture and salinity and are especially vulnerable to human pressures. Remote sensing is helpful to identify vegetation change in semi-arid wetlands and to assess wetland degradation. Remote sensing-based monitoring requires identification of the spectral characteristics of soils and vegetation and their correspondence with the vegetation cover and soil conditions. We studied the spectral characteristics of soils and vegetation of saline wetlands in Monegros, NE Spain, through field and satellite images. Radiometric and complementary field measurements in two field surveys in 2007 and 2008 were collected in selected sites deemed as representative of different soil moisture, soil color, type of vegetation, and density. Despite the high local variability, we identified good relationships between field spectral data and Quickbird images. A methodology was established for mapping the fraction of vegetation cover in Monegros and other semi-arid areas. Estimating vegetation cover in arid wetlands is conditioned by the soil background and by the occurrence of dry and senescent vegetation accompanying the green component of perennial salt-tolerant plants. Normalized Difference Vegetation Index (NDVI) was appropriate to map the distribution of the vegetation cover if the green and yellow-green parts of the plants are considered. View Full-Text
Keywords: arid wetlands; field spectrometry; green fraction cover; NDVI; halophytes; playa-lakes; Ramsar wetlands; soil salinity arid wetlands; field spectrometry; green fraction cover; NDVI; halophytes; playa-lakes; Ramsar wetlands; soil salinity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Domínguez-Beisiegel, M.; Castañeda, C.; Mougenot, B.; Herrero, J. Analysis and Mapping of the Spectral Characteristics of Fractional Green Cover in Saline Wetlands (NE Spain) Using Field and Remote Sensing Data. Remote Sens. 2016, 8, 590.

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