Envíos recientes

  • Historical gully erosion with loess areas of SE Poland – Natural conditions and human impact 

    Zglobicki W.; Baran-Zglobicka, B.; Gawrysiak L. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    Gullies constitute one of the most characteristic elements of loess relief in SE Poland. Particularly dense net of permanent gullies – in some places more than 10 km?km-2 – appears in areas of specific conditions of abiotic ...
  • Soil erosion on the bottom of hollows in steppe zone of Ukraine 

    Zubov A.R.; Zubova, L.G. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    Soil erosion, undoubtedly, is one of the main ecological and agricultural problems in the world. Quantity of eroded lands in Ukraine achieves 10.5 millions ha. Annual losses of soil constitutes about 600 millions tons in ...
  • The role of preferential flow through soil-pipes in ephemeral gully erosion 

    Wilson, G.V. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    The objective of this study was to quantify the hydrologic conditions under which discontinuous soil-pipes reestablish ephemeral gullies and continuous soil-pipes initiate ephemeral gullies.
  • A general sediment transport model for linear incisions 

    Vanwalleghem, T.; Giráldez, J.V.; Jiménez Hornero, F.J.; Laguna, A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    Previous research has shown that the functional relationship between sediment transport and shear stress, discharge and slope is non-linear. The different datasets that support this hypothesis are however all derived from ...
  • Gully erosion risk zoning: proposal of a methodology and case study 

    Viero, A.C.; Castro, N.M.R.; Risso, A.; Goldenfun, J.A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    Gullying is the most advanced, complex stage of erosion processes, with more local destructive power than other types of erosion (São Paulo, 1990). In this paper, we propose a method to generate gully erosion risk zoning ...
  • Seepage erosion impacts on edge-of-field gully erosion 

    Wilson, G.V.; Fox, G.A.; Chu-Agor, M.L. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    Concentrated flow is generally considered the controlling mechanism for gully erosion whereas subsurface flow is often overlooked. The two mechanisms of subsurface flow attributed to gully erosion are seepage flow and ...
  • Influence of soil structure, pore-water pressure, and tailwater height on headcut migration in upland concentrated flows 

    Wells, R.; Alonso, C.V.; Bennett, S.J. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    The primary objective of this study was to determine the impact of soil texture, soil pore-water pressure, and tailwater height on scour hole dimensions, migration rate and sediment yield in headcuts migrating under steady ...
  • Some examples of ephemeral gully erosion in an Atlantic area of NW Spain 

    Valcárcel, M.; Paz, A.; Vidal, E. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    This study aimed to describe types of ephemeral gullies and to determine their origin, evolution and importance as sediment sources in Galicia (Northwest Spain). Concentrated erosion was surveyed on medium textured soils, ...
  • 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)   Congreso / Biltzarra  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 ...
  • 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)   Congreso / Biltzarra  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 ...
  • 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)   Congreso / Biltzarra  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 ...
  • Morphology and controlling factors of landslide cirque gullies: a case study from the Sprogu gravas nature monument (SE Latvia) 

    Soms, J. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    Human-induced changes of landscape and the vegetation cover have been recognized in the majority of studies focusing on gully formation as one of the most important factors triggering the development of gullies throughout ...
  • Discharge and gully erosion in a small rangeland catchment 

    Schnabel, S.; Gómez Gutiérrez, Á.; Sanjosé Blasco, J.J. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  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; Thomas ...
  • 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)   Congreso / Biltzarra  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 ...
  • The importance of the presence of gullies in the production of sediments in semiarid areas (Murcia, south-east of Spain) 

    Romero Díaz, A.; Martínez Lloris, M.; Alonso Sarría, F.; Belmonte Serrato, F. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    The study has shown how the existence of gullies remarkably increases the rates of erosion and, therefore, the volume of sediments that arrives at the dikes of hydrological correction. A consequence of this is the need to ...
  • Seepage flow in aquifers with open and closed boundaries 

    Römkens, M.J.M.; Prasad, S.N. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    At previous gully erosion conferences, the effect of surface seal development on gully formation and growth was analyzed (Prasad and Römkens, 2003) and the effect of hydrological conditions on gully growth was discussed (Römkens ...
  • Waterfall erosion as a main factor in ephemeral gully initiation in a part of Northeastern Iran 

    Sadeghi, S.H.R.; Rangavar, A.S.; Bashari, M.; Abbasi, A.A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    The present study assesses the factors controlling gully formation in a study area located in northeastern Iran. Gully erosion in northeastern Iran is very high because of the high rate of human encroachment and the resulting ...
  • Gully erosion in semi-arid landscapes - monitoring of processes and development 

    Ries, J.B.; Marzolff, I.; Seeger, M. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    The research project MoGul (Large-scale Monitoring of Gully Erosion in Semi-Arid Landscapes) at Trier and Frankfurt University investigates the various types, development and dependencies of gullies as well as geomorphological ...
  • Influence of snowmelt and heavy rainfalls on water and sediment yield from loess gully catchment (Lublin upland – Poland) 

    Rodzik, J.; Furtak, T.; Zglobicki, W. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    The surface discharge from the gully catchments of the Lublin Upland (Poland) usually is not very high and amounts to about 15 mm·yr-1. It is mainly an episodic discharge of snow/rainfall regime. Surface runoff and ...
  • Surfaces of gullies generated by piping process in abandoned fields (south-east of Spain) 

    Romero Díaz, A.; Marín Sanleandro, P.; Sánchez Soriano, A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Congreso / Biltzarra  OpenAccess
    The piping process have an important development in old agricultural terraced fields. The abandonment of these fields, together with the lithologies, hydraulic and climatic characteristics favour the quick development of ...

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