Progress in gully erosion research: IV International Symposium on Gully Erosion 

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Browsing Progress in gully erosion research: IV International Symposium on Gully Erosion  by Author "Bennett, S.J."

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    PublicationOpen Access
    AnnAGNPS ephemeral gully erosion simulation technology
    (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007) Bingner, R.L.; Theurer, F.D.; Gordon, L.M.; Bennett, S.J.; Parker, C.; Thorne, C.; Alonso, C.V.
    Tillage-induced ephemeral gully erosion has been shown to be a significant and sometimes dominant source of sediment within a watershed. An approach has been developed within AnnAGNPS to assess the impact of conservation practices on ephemeral gully erosion as well as sheet and rill erosion. Conservation management treatments should include targeting practices specific for ephemeral gullies differently than for sheet and rill erosion. Within watersheds, gullies are becoming the dominate source of cropland erosion unless preventative conservation practices are installed.
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    PublicationOpen Access
    Ephemeral gullies: to till or not to till?
    (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007) Gordon, L.M.; Bennett, S.J.; Alonso, C.V.; Bingner, R.L.
    While the perceived magnitude of ephemeral gully erosion may be masked after gullies are repaired, the action of plowing in these channels reduces topsoil thickness and crop productivity over a much wider area than the channel itself. This study demonstrates that filling ephemeral gullies on an annual basis during tillage operations may be more destructive than realized. These results should provide land managers an additional incentive for adopting soil conservation practices such as no-till.
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    PublicationOpen Access
    Ephemeral gully headcut development and migration in stratified soils
    (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007) Gordon, L.M.; Bennett, S.J.; Wells, R.; Alonso, C.V.
    The objectives of the current study were: (1) to quantify the effect of an erosion resistant (ER) soil layer placed at various depths within a soil profile on headcut development and migration; and (2) to assess the effects of this ER layer on analytic formulations for headcut erosion based on jet impingement theory.
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    PublicationOpen Access
    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) Wells, R.; Alonso, C.V.; Bennett, S.J.
    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 surface runoff conditions.
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    PublicationOpen Access
    Turbulent flow within headcut scour holes in rills and gullies
    (Universidad Pública de Navarra / Nafarroako Unibertsitate Publikoa, 2007) Bennett, S.J.; Alonso, C.V.
    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 mechanisms within the scour hole domain.