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Causes of gully erosion in arid ecosystem: case study southern part of I.R. Iran
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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 ...
The importance of the presence of gullies in the production of sediments in semiarid areas (Murcia, south-east of Spain)
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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 ...
Waterfall erosion as a main factor in ephemeral gully initiation in a part of Northeastern Iran
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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 ...
Seepage flow in aquifers with open and closed boundaries
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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 ...
Gully erosion risk zoning: proposal of a methodology and case study
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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 ...
Soil erosion on the bottom of hollows in steppe zone of Ukraine
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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 ...
Influence of soil structure, pore-water pressure, and tailwater height on headcut migration in upland concentrated flows
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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, ...
Seepage erosion impacts on edge-of-field gully erosion
(Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007)
info:eu-repo/semantics/conferenceObject,
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 ...