Now showing items 1-20 of 64

    • 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. ...
    • Agricultural land use, piping and gullies activity in the Huelva lower valley (Saragossa, Spain) 

      Echeverría, M.T.; Ibarra, P.; Pérez Cabello, F. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The variations in the total amount of surface used for arable crops both for dry farming and fallow land, with regard to the different “agricultural policies”, have modified the natural dynamics of some processes such as ...
    • Alluvial gully erosion: a landscape denudation process in Northern Australia 

      Brooks, A.P.; Shellberg, J.G.; Spencer, J.; Knight, J. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Recent aerial reconnaissance surveys and subsequent remote sensing mapping of Australia’s tropical rivers identified alluvial gully erosion as a key sediment source (Brooks et al. 2007; Knight et al. 2007). Gully erosion ...
    • 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 ...
    • AnnAGNPS ephemeral gully erosion simulation technology 

      Bingner, R.L.; Theurer, F.D.; Gordon, L.M.; Bennett, S.J.; Parker, C.; Thorne, C.; Alonso, C.V. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Tillage-induced ephemeral gully erosion has been shown to be a significant and sometimes dominant source of sediment within a watershed. An approach has been developed within AnnAGNPS to assess the impact of conservation ...
    • 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 ...
    • Causes of gully erosion in arid ecosystem: case study southern part of I.R. Iran 

      Soufi, M. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      This research demonstrated that the I.R. region is prone to gully erosion. The study area had limited gully erosion four decades ago. With accelerating urban development during the past, two to three decades, areas of gully ...
    • 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 ...
    • Comparison of historical evolution of gully networks on both Slovak and Moravian forelands of the white Carpathians 

      Stankoviansky, M.; Létal, A.; Damankosová, Z. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The main objective of the contribution is to present the preliminary results of comparison of historical evolution of gully networks in both Slovak and Moravian forelands of the White Carpathians. This geomorphic unit ...
    • 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 ...
    • Discharge and gully erosion in a small rangeland catchment 

      Schnabel, Susanne; Gómez Gutiérrez, Á.; Sanjosé Blasco, J.J. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Valley bottom gullies are a common feature in rangelands. Although these gullies are found in the bottom of drainage lines, information about the relationship between discharge and gullying is scarce (Crouch, 1990; ...
    • 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 ...
    • Effect of topography on retreat rate of different gully headcuts in Bardenas Reales area (Navarre, Spain) 

      Campo-Bescós, Miguel Upna; Álvarez-Mozos, Jesús Upna; Casalí Sarasíbar, Javier Upna; Giménez Díaz, Rafael Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In Northeast Spain, gullying is a widespread phenomenon. This type of erosion is especially intense in Bardenas Reales (Navarre) where at least two major typical kinds of gully headcut are present. A first group developed ...
    • Effectiveness of palm and bamboo geotextiles in reducing concentrated flow erosion 

      Smets, T.; Langhans, C.; Poesen, J.; Knapen, A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Rills and gullies, caused by concentrated flow erosion, represent an important sediment source in many environments (Poesen et al., 2003). Studies indicate that vegetation can be very effective in controlling gully ...
    • Effects of slope processes and management in gullying 

      Desir, G.; Marín, C. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Most erosion studies have been typically done in rill and interrill areas because the complexity of gullies and their large size have made their study very difficult. Morgan (1979) and Hudson (1985) define gullies as water ...
    • Ephemeral gullies: to till or not to till? 

      Gordon, L.M.; Bennett, S.J.; Alonso, C.V.; Bingner, R.L. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      While the perceived magnitude of ephemeral gully erosion may be masked after gullies are repaired, the action of plowing in these channels reduces topsoil thickness and crop productivity over a much wider area than the ...
    • Ephemeral gully erosion research: processes and modeling 

      Alonso, C.V. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The USDA Natural Resources Conservation Service (NRCS) defines ephemeral gullies as small channels that can be filled in by normal tillage operations only to reform in the same location by subsequent runoff events. Ephemeral ...
    • Ephemeral gully headcut development and migration in stratified soils 

      Gordon, L.M.; Bennett, S.J.; Wells, R.; Alonso, C.V. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The objectives of the current study were: (1) to quantify the effect of an erosion resistant (ER) soil layer placed at various depths within a soil profile on headcut development and migration; and (2) to assess the ...
    • 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 ...
    • Estimating sediment yield from gully erosion using easily measurable morphometric characteristics in Darehshahr region, south of I.R. Iran 

      Sadeghi, S.H.R.; Noormohammadi, F.; Soufi, M. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      A case study was conducted in a part of Ilam Province, I.R. Iran, to establish a reliable model for estimating sediment yield from gully erosion. The attempt was satisfactory and led to an applicable model whose input could ...