Now showing items 21-40 of 124

    • Activity of gullies during the Holocene in the Ebro valley 

      Peña, J.L.; Constante, A.; Chueca, J.; Echeverría, M.T.; Julián, A.; Longares, L.A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The use of detailed geomorphology for the study of the Upper Holocene and the application of geoarchaeology and radiometric datings make it possible to get important results on the recent stages of valley bottom shaping. ...
    • Assessment of gully erosion using photogrammetric techniques. A case study of upper Mbuluzi river, Swaziland 

      Pelacani, S.; Märker, M.; Rodolfi, G. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Swaziland is severely affected by gully erosion contributing to a sediment budget up to 250,000 m3 y-1 (WMS Associates, 1988). This type is more important than inter-rill and rill erosion. Severe gully erosion is mainly ...
    • Recent developments in gully erosion research and their implications for controlling soil loss and sediment yield 

      Poesen, J. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Soil erosion by water causes significant soil degradation worldwide. Most erosion process research and erosion control has focussed on sheet and rill erosion. Relatively little research has dealt with (ephemeral) gully ...
    • Hydrological and sediment dynamics within a small catchment with badland areas 

      Nadal-Romero, Estela; Regüés, D.; Latron, J.; Lana Renault, Noemí; Serrano-Muela, M. Pilar; Martí Bono, C. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Badlands are the main sediment source areas affecting the headwaters of the Gállego and Aragón rivers in the Central Spanish Pyrenees. These morphologies characterise the landscape of the Inner Depression, occupying ...
    • Erosion processes at the gully scale: observations, quantification and interpretation of field data from the Draix laboratory 

      Mathys, N.; Klotz, S.; Esteves, M.; Grésillon J.M. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In the Southern French Alps, the black marls formation covers a large area and is highly susceptible to weathering and erosion. It has a badlands topography and is subject to high solid transport, bringing high sediment ...
    • Gully development and topographic threshold, case study: Kerman Province, southeast of I.R. Iran 

      Mehdipour, A.; Soufi, M.; Baniasadi, M. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This research indicated that gully erosion can severely damage croplands in this area of Iran. Significant gully development occurred in the 3 years of study and the product of drainage headcut area and slope was more strongly ...
    • Analysis of water erosion using GIS and remote sensing for the management of protected natural environments in the south of the province of Salamanca (Spain) 

      Martínez Graña, A.M.; Goy, J.L.; Zazo, C. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The soil is a natural resource that must be conserved in protected natural areas since it is one of the determinant physical supports in territorial planning because it governs its different uses. Accordingly, specific ...
    • Photogrammetrical and field measurement of gullies with contrasting morphology 

      Marzolff, I.; Giménez Díaz, Rafael Upna; Seeger, M.; Campo-Bescós, Miguel Upna; Ries, J. B.; Casalí Sarasíbar, Javier Upna; Álvarez-Mozos, Jesús Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Despite a wealth of studies on monitoring different types of gullies by using remote-sensing technique such as photogrammetry, relatively few efforts have been made to test their accuracy. Therefore the question arises ...
    • Regional assessment of gully systems in a hilly olive-orchard dominated landscape 

      Masri, Z.; Turkelboom, F.; Pauw, E. de; Muhammad, A. M.; Sheikho. A.; Dalton, P. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Olive orchards dominate the land use at the hills of Afrin area, and olive oil represents the most important cash income source for rural communities in this area. However, olive yields in many orchards have been decreasing ...
    • Does vegetation cover suppose gully erosion stabilization? 

      Martínez Casasnovas, J.A.; García Hernández, D.; Ramos, M.C. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The present research is addressed to study the evolution of vegetation cover on gully sidewalls and its influence on sediment production due to gully erosion and on gully walls’ stabilization. A sample gully system of the ...
    • Sidewall erosion control strategies in gullies of the Penedès – Anoia vineyard region (NE Spain) 

      Martínez Casasnovas, J.A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The objective of this work is to formulate different sidewall erosion control strategies to reduce retreat and sediment production rates in the gullies of the Penedès-Anoia (NE Spain) region.
    • When did gully erosion start to be accelerated in the Penedès – Anoia vineyard region (NE Spain)? 

      Martínez Casasnovas, J.A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Gully erosion in the Penedès-Anoia (NE Spain) region is not a past phenomenon. In this respect, recent research by Martínez-Casasnovas et al. (2003) has shown that neat erosion rates in gullies reach 576±58 Tn ha-1 year-1 ...
    • Gully development in agricultural fields: insights from catchment scale analysis 

      Markovitch, H.; Svoray, T. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The aim of this paper is to study the combined effect of human-induced activity and the physical environmental conditions on gully development in a small agricultural catchment in Northern Israel. More specifically the ...
    • A comparison of anthropogenic and long-term soil erosion on banks peninsula using 137Cs and kawakawa tephra 

      Lutter, F.S.; Almond, P.C.; Florineth, F. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The task of this study is to assess the severity of anthropogenically induced soil erosion on a loess-mantled hillslope on the foothills of Banks Peninsula, South Island, New Zealand. The analysis is restricted to a slope ...
    • Gully erosion in mountain area of SW-China, assessed using 137Cs and 210PBEX tracers and GPS survey 

      Li, Y.; Poesen, J.; Liu, L.M.; Li, L.; He, F.H.; Zhang, Q.W.; Li, R. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Gullies are extensively distributed in the Upper Yangtze River Basin, SW-China. But the impact of these gullies on total sediment output is still not clear because there is no reliable technique for quantifying this issue. ...
    • A proposal to study gully erosion on silica sand and arkose slopes in central Spain 

      Lucía, A.; Sanz, M.A.; Vicente, F.; Martín, C.; Martín, J.F.; Bodoque, J.M.; Pedraza, J.; López, N. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A research project to be developed, granted by the Spanish Minister of Education and Science (project CGL2006-07207), aims to investigate gully erosion on silica sand and arkose slopes in Central Spain. The period of the ...
    • Long term evolution of incised coastal channels on the isle of Wight, UK: insights from numerical modelling 

      Leyland, J.; Darby, S.E. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Moderate rates of effective precipitation induce a realistic incised channel network, providing there is a step cliff profile present. Such a step profile is shown to be produced by sea-level rise and associated cliff ...
    • Proposed methodology to quantify ephemeral gully erosion 

      Huang, C.; Nouwakpo, K.; Frankenberger, J.R. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The overall objective of the proposed research is to identify and quantify landscape attributes and hydrologic conditions that can be used to assess hillslope seepage and ephemeral gully erosion. We propose to use three ...
    • Concentrated flow erodibility of loess-derived topsoils: the impact of rainfall-induced consolidation and sealing 

      Knapen, A.; Poesen, J.; Baets, S. de (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This study investigates the impact of rainfall-induced soil consolidation and soil surface sealing processes over time after tillage on soil erosion during concentrated flow. The soil erodibility (Kc) and critical flow ...
    • Gully dynamics: initiation and morphology 

      Kirkby, M.J. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The paper reviews general conditions for initiation and maintenance of gullies.