Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 342479
Title Effect of dyke construction on water dynamics in the flooding savannahs of Venezuela
Author(s) Smith, J.K.; Chacon Moreno, E.J.; Jongman, R.H.G.; Wenting, P.F.M.; Loedeman, J.H.
Source Earth Surface Processes and Landforms 31 (2006)1. - ISSN 0197-9337 - p. 81 - 96.
DOI https://doi.org/10.1002/esp.1235
Department(s) Resource Ecology
Landscape Centre
Laboratory of Geo-information Science and Remote Sensing
PE&RC
ALTERRA Wageningen UR
Publication type Refereed Article in a scientific journal
Publication year 2006
Abstract In the flooded savannahs water is the main factor determining the ecosystem and its change. During flooding, the level of water and the duration of flooding are highly dependent on the relative height position of the ecosystem unit. To understand the spatial processes in the ecosvstem one must know the water dynamics in the area. In order to quantify the water content during the year, a digital elevation model (DEM) is needed. Several areas in the Llanos de Orinoco have been dyked (modulos). A digital elevation model has been developed on a level of the dyked area of the modulo of Hato el Frio. Flooding has been studied at the regional level and a DEM has been developed for the modulo area. For the construction of the DEM various sources were explored for height information. Field measurements with GPS were necessary. After the high flooding period downstream of the dykes the area is totally dry. In the transition period between the dry and the wet season the distribution of water shows a clear influence of the dyke. In the natural situation the natural height differences create a complex system of sinks. The dyke construction has created a large artificial sink. Modulus form sinks by their banks preventing the outflow of the water. With the help of a DEM, inundation can be modelled with relatively little field research. Copyright (c) 2005 John Wiley & Sons, Ltd.
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