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Hydrogeology Journal

Erschienen in:

01.02.2007 | Paper

Remote sensing and GIS based determination of groundwater dependent ecosystems in the Western Cape, South Africa

verfasst von: Zahn Münch, Julian Conrad

Erschienen in: Hydrogeology Journal | Ausgabe 1/2007

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Abstract

Finding the location of groundwater dependent ecosystems (GDEs) is important in determining the extent of restrictions that need to be placed upon the abstraction of groundwater. Remote sensing was combined with geographical information system (GIS) modelling to produce a GDE probability rating map for the Sandveld region, South Africa. Landsat TM imagery identified the areas indicating the probable presence of GDEs and GIS assisted in their delineation. Three GIS models were generated: a GIS model predicting landscape wetness potential (LWP model) based on terrain morphological features; the LWP model was modified to highlight groundwater generated landscape wetness potential (the resulting GglWP model); and a groundwater elevation model was interpolated, combining groundwater level measurements in boreholes in the region with digital elevation model data. Biomass indicators generated from Landsat were classified and combined with the GIS models, followed by field verification of riverine and wetland GDEs. The LWP model provided the most accurate results of the three models tested for GDEs in this region.

Vorheriger Artikel How can remote sensing contribute in groundwater modeling?

Nächster Artikel Detection of lineaments using airborne laser scanning technology: Laxemar-Simpevarp, Sweden

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Titel: Remote sensing and GIS based determination of groundwater dependent ecosystems in the Western Cape, South Africa
verfasst von: Zahn Münch
Julian Conrad
Publikationsdatum: 01.02.2007
Verlag: Springer-Verlag
Erschienen in: Hydrogeology Journal / Ausgabe 1/2007
Print ISSN: 1431-2174
Elektronische ISSN: 1435-0157
DOI: https://doi.org/10.1007/s10040-006-0125-1

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