Now showing items 54-64 of 64

    • Scouring-sedimentation balance for gully reaches affected by check dams in Mediterranean environments 

      Conesa García, C.; García Lorenzo, R. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Many of the geomorphological impacts caused by check dams are usually fairly common in torrential channels (bed agradation upstream into the sedimentary wedges, deepening and narrowing of the bankfull channel downstream, ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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 ...
    • 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.
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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, ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • Turbulent flow within headcut scour holes in rills and gullies 

      Bennett, S.J.; Alonso, C.V. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      The objectives of the present study were to experimentally determine the time-mean turbulent flow characteristics within fixed-bed models of headcut scour holes typical of upland concentrated flows to assess soil erosion ...
    • Urban gullies in São Luis City, Maranhão State, Brazil 

      Guerra, A.J.; Bezerra, J.F.; Fullen, M.A.; Mendonça, J.K.S.; Sathler, R.; Lima, F.S.; Mendes, S.P.; Guerra, T.T. (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)   Contribución a congreso / Biltzarrerako ekarpena  OpenAccess
      Urban gully erosion is a serious problem in São Luís City, Maranhão State, Brazil. São Luís Municipality covers 831.7 km? and is situated in west-central Maranhão Island (2º19’09”-2º51’00” S; 44º01’16”-44º19’37” W). ...
    • 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)   Contribución a congreso / Biltzarrerako ekarpena  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 ...
    • 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 ...