Remote‐sensing‐derived fractures and shrub patterns to identify groundwater dependence
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URI: http://hdl.handle.net/10835/16000
DOI: https://doi.org/10.1002/eco.1933
DOI: https://doi.org/10.1002/eco.1933
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Guirado Hernández, Emilio; Alcaraz Segura, Domingo; Rigol Sánchez, Juan Pedro; Gisbert Gallego, Juan; Martínez Moreno, F.J.; [et al.]Fecha
2018Resumen
The identification and location of groundwater‐dependent ecosystems are the first steps in protecting and managing them. Such identifications are challenging where the surface expressions of groundwater are not obvious. This work presents a remote‐sensing‐based approach to infer the groundwater dependence of semiarid shrubs from their association with fractures that facilitate root access to groundwater. As a case study, we used the Ziziphus lotus matorral in south‐east Spain, a priority conservation habitat in the European Union (Habitat 5220*, Directive 92/43/EEC) that is highly threatened by agricultural and urban sprawl. The approach combines
object‐based image analysis of high‐resolution orthoimages to map Ziziphus individuals, geomorphometric analysis of a lidar‐derived terrain model to map bedrock fractures, and spatial statistics to assess the association between Ziziphus and fractures. Electrical resistivity tomography was used to validate the identified fractures, and the se...
Palabra/s clave
phreatophyte
Cabo de Gata‐Níjar Natural Park
Sentinel‐2A
shrub mapping
very‐high‐resolution images
average minimum distance