< back to presentation overview

Details of the presentation
Presentation Poster presentation
Title Land use changes in the Sandveld Region, West Coast South Africa

PDF Download ---
Short title Sandveld land use changes

Author(s) Magidi, J.T.(1); Knight, R.S.(1); Krug, C.B.(2); Keil, M.(3); Gessner, U.(4); Hüttich, Ch.(4)

Presenting author Magidi, J.T.

Institution(s) (1) Dept of Biodiversity and Conservation Biology, University of the Western Cape, Cape Town; (2) Dept of Zoology, University of Cape Town, Cape Town; (3) German Aerospace Center (DLR), Oberpfaffenhofen; (4) Inst. for Geography, University of Würzburg

Keywords Change detection; Landuse change; Remote sensing; Sandveld; Time series analysis;

Abstract Environmental threats such as agriculture, climate change, invasive species and urban growth are the major causes of habitat transformation in the Cape Floristic Region. Intensive agriculture, especially the central pivot irrigation system, has led to recent habitat change in the Sandveld between the Berg River and the Olifants River on the West Coast of South Africa. Landsat 5 images for 1990, 2000, 2004 and 2007 with a 30m spatial resolution were classified into nine land use classes. A supervised procedure and a maximum likelihood classifier followed by cross-classification and Kappa Index of Agreement statistic were used to detect landuse changes between the years.

MODIS 16day NDVI datasets from 2000 to 2006 with a 250m spatial resolution were used to undertake a time series analysis and to explore trends in vegetation cover. Landuse change was characterised by the natural vegetation becoming increasingly disturbed and changed to permanent agriculture. The time series analysis suggested that the landscape has a high degree of overall dynamic change with pronounced inter and intra annual changes. During the seven years there was an overall increase in greenness associated with increasing agricultural activity.

Congress Topic Land use, impact and value

Topic No. ---
Notes ---

Ref. No. 610