Now showing items 22-41 of 64

    • A general sediment transport model for linear incisions 

      Vanwalleghem, T.; Giráldez Cervera, Juan Vicente; Jiménez Hornero, F.J.; Laguna, A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • Gullies on mars: the debate about formative processes (keynote) 

      Howard, A.D. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The discovery of very young gully systems on Mars has occasioned a lively debate about the processes and materials involved in their formation (Malin and Edgett, 2000). The strong interest in these features results because ...
    • 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 ...
    • 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 ...
    • 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.
    • Gully erosion in central Italy: denudation rate estimation and morphoevolution of Calanchi and Biancane badlands 

      Della Seta, M.; Del Monte, M.; Fredi, P.; Lupia Palmieri, E. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Long lasting geomorphological researches (Ciccaci et al., 1981, 1986, 2003; Del Monte et al., 2006) allowed the evaluation of denudation rates in some of the major catchments of Central Italy. It was observed a noticeable ...
    • 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. ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • Gully erosion on cinder cones of Tenerife (Canary Islands, Spain) 

      Dóniz, J.; Romero, C. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The aim of this study is to observe the evolution of gully erosion on cinder cones over time and verify whether or not age is a critical factor in the level of degradation of scoria cones, independent of other factors.
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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 ...
    • Hydrological effects of the sediments deposited off a hillslope affected by rill erosion: project outlines and preliminary results 

      Giménez Díaz, Rafael Upna; Casalí Sarasíbar, Javier Upna; Campo-Bescós, Miguel Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The main objectives of this project are (i) to evaluate the sedimentation rate generated by rill erosion in a hillslope and the granulometric characteristics of the sediment deposited off this hillslope, and (ii) to ...
    • Impact of root architecture, soil and flow characteristics on the erosion-reducing potential of roots during concentrated flow 

      Baets, S. de; Poesen, J.; Knapen, A. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      In this study, the effects of roots of different root morphologies (tap roots vs. fine-branched roots) on concentrated flow erosion rates are studied experimentally. The impact of soil type, soil moisture conditions ...
    • Implications of recent experimental findings for rill erosion modeling 

      Govers, G.; Giménez Díaz, Rafael Upna; Oost, K. van (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The major aim of this paper is to critically review the theoretical concepts that are underpinning current models of rill flow and sediment detachment in the light of recent experimental results and, when necessary, to ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • Improving the structural stability of cropped soils in Olite (Navarre) using conservation tillage to reduce water erosion 

      Río Lahidalga, Iker del; Fernández Ugalde, Oihane Upna; Imaz Gurruchaga, María José Upna; Enrique Martín, Alberto Upna; Bescansa Miquel, Paloma Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The objective of this work was to compare the soil wet aggregate stability and its relationship to the soil organic matter stock in an agricultural soil under different types of tillage in a semi-arid area of Northern Spain.
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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 ...