Now showing items 1-15 of 15

    • 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 ...
    • 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)   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; Thomas ...
    • 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 ...
    • 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 ...
    • 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 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.
    • 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 ...
    • 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 ...
    • Progress in gully erosion research: IV International Symposium on Gully Erosion 

      Casalí Sarasíbar, Javier Upna; Giménez Díaz, Rafael Upna (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Libro / Liburua  OpenAccess
      The classic forms of water erosion of the soil comprise sheet, rill, and gully erosion. According to the concept most generalized, in sheet erosion, thin layers of material are uniformly removed from the soil surface due ...
    • 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 ...
    • 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 ...
    • Runoff and sediment supply from small gullied and ungullied basins in a semi-arid grazed environment 

      Chocron, M.; Laronne, J.B.; Alexandrov, Y. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The aim of the present study is to determine links between rainfall, runoff, gully erosion and sediments. The extent of sediment yield (suspended sediment and bedload) and runoff response from gullied and ungullied basins ...
    • Seepage flow in aquifers with open and closed boundaries 

      Römkens, M.J.M.; Prasad, S.N. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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 ...