Browsing by Subject "cobertura vegetal"

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    Erosión y desertificación.-Estudio del factor “C” de la RUSLE en la cuenca del río Birrís, Costa Rica
    Lianes, Elena; Marchamalo, Miguel; Roldán, Margarita; Universidad de Murcia
    ABSTRACT This work contributes to increase the knowledge about the relations between vegetation cover and water erosion in order to obtain technical coefficients based on field data and the RUSLE model. The study watershed produces high erosion rates, mainly due to the decrease of forest cover, land misuses and changes in the drainage network, causing damage in the hydropower, agricultural and pasture production. Values of RUSLE C factor were determined for the different kind of vegetation cover. C factor varies considerably between agricultural cover, C = (0,3 - 0,4), and the other vegetation covers, C = (0,002 - 0,04). Agricultural factor C was calculated for the different phases of the crop (SLRcrop phase). To decrease erosion the implementation of integrated management practices is recommended for soil and water conservation taking into account the vegetation cover proposals that better protect the soil based on the results of the present work.
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    Erosión y desertificación.-Valorización de purines de cerdo en rehabilitación de espacios mineros: ensayos en condiciones de campo
    Carmona, D.M.; Faz Cano, A.; Zanuzzi, A; Acosta, J.A.; Martínez-Martínez, S.; Muñoz, M.A.; Universidad de Murcia
    ABSTRACT The intense mining activity carried out in Cartagena-La Unión Mountain, in Murcia region, has provoked extremely high accumulation of heavy metals in the environment. Due to the absence of vegetation cover, these soils are very liable to erosion, either wind or water, and they represent the major source of heavy metals pollution for the local environment due to dust blow and leaching of the results of mineral weathering into nearby watercourses. After 4 years of experiments in plots (4 m2), it has been demonstrated the potential use of pig manure to rehabilitate degraded and polluted soils, increasing carbon content and nutrients, promoting aggregates stability, decreasing mobility of heavy metals and establishing plant cover. In this study we pretend to extrapolate the results obtained in these plot previous experiments to field large scale scenarios using pig manure to amend the polluted soil and phytostabilization technique with native species in order to allow spontaneous colonization by plants and minimise the risks associated to those mining areas.