Abstract
Evolutionary analysis of the fluvial landscape provides relevant inputs for the environmental management of a territory, in such a way that the understanding of the dynamics of fluvial spaces becomes a preponderant factor in the definition of protection and management strategies. Although the development of geographic information systems is a step forward in the study of the landscape, it is necessary to establish methodological frameworks that make remote sensing techniques available at multiple spatio-temporal scales, especially in basins with high levels of intervention. In the present study, we develop a methodology for the analysis of the fluvial landscape development in the last century of a highly modified water body, through the detailed study of hydrogeomorphic elements, using remote sensing techniques including high-density surface data (LiDAR) and historical aerial imageries; when supported by fieldwork, these allow for the identification of the sequence of sedimentation–erosion zones, differentiating in detail the zones denominated as areas of current erosion, accretion zones, and historical erosion zones. An application of the methodology was carried out in the Larrodrigo stream, located in Salamanca, Spain.
Highlights
Considering the above, the aim of the present work is to develop a methodological framework to carry out an evolutionary study of the fluvial landscape in an intermittent water body on which agricultural activities have intervened
The methodological framework formulated in this study allowed the detailed geomorphological characterization of the current state of the alluvial plain of an intermittent water body after intervention by anthropogenic activities
The method allowed us to study the horizontal movement of the geomorphic elements, differentiating in detail those zones denominated as current erosion areas, accretion zones and historical erosion zones
Summary
Spatio-temporal analysis of the landscape makes it possible to understand some of the physical phenomena that interact with and modify the surface of a given region. These analyses provide information for the formulation of evaluation and management plans for landscapes subject to degradation or anthropic intervention, including, for example, abandoned mines [1], fluvial spaces [2], contaminated sites, or landscapes modified by soil and vegetation involvement [3]. In recent decades, geomorphological analyses have become a very important input when studying the development of the landscape [4] This has made it possible to understand the past and present of landscapes, and even to assess future trends based on the analysis of the causes that generate erosive forms and deposits [5]. The geomorphological characterization of the territory has become an input for the definition of homogeneous units that, integrated with various abiotic and biotic variables, improve the environmental and sustainable management of the territory [6,7]
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