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Título: | A century of gully erosion research: Urgency, complexity and study approaches |
Autor: | Castillo, Carlos CSIC ORCID; Gómez Calero, José Alfonso CSIC ORCID | Palabras clave: | Gully erosion Gully control Survey methodologies Subsurface processes Land degradation |
Fecha de publicación: | sep-2016 | Editor: | Elsevier | Citación: | Earth-Science Reviews 160: 300-319 (2016) | Resumen: | Gully erosion has become a field of growing interest among the research community but there still are numerous knowledge gaps that need to be addressed. The aim of this work is to carry out a systematic review on significant trends in gully erosion research included in the Web of Science database in order to evaluate the survey methodologies, evaluate the impact of key factors on the complexity of gully erosion responses and raise public awareness of this urgent environmental issue. Gully erosion represents at present around 10% of soil erosion research, a percentage that is at odds with being the worst form of soil degradation in agricultural areas. Despite the fact that it is an ubiquitous process all around the world, the worst stages of degradation take place where unsustainable human practices operate in erosion-prone conditions such as erodible soils, soft lithologies or geotechnically instable slopes. Anthropic influence is typically the main driver of gully erosion evolution and has acted differently in time and results across the countries depending on the history of land use and management practices. Although gully erosion is known to be largely controlled by deep-profile properties, the study on subsurface processes has frequently remained mostly descriptive and it is losing ground to other more recent techniques aiming to assess morphological changes. We found empirical support for the argument that deeper incision tends to lead to higher degradation rates, which endorses the focus on subsurface dynamics and early control to prevent catastrophic land degradation. Long-standing detailed survey programmes are still scarce in gully erosion studies all of which hampers a reliable evaluation of this highly variable phenomenon. Further coordinated and sustained research efforts are still required to tackle this urgent environmental problem through better understanding (e.g. building longer and consistent data series, combining survey methodologies regarding surface and subsurface factors, providing standardised guidelines for interpretation), more effective control implementation and wider dissemination. | Versión del editor: | http://doi.org/10.1016/j.earscirev.2016.07.009 | URI: | http://hdl.handle.net/10261/157291 | DOI: | 10.1016/j.earscirev.2016.07.009 | ISSN: | 0012-8252 |
Aparece en las colecciones: | (IAS) Artículos |
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