![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E52UINTERIOR_SPLASH_13.PNG) The highlands of Lesotho, the source of the Orange-Senqu River. Source:©iStockphoto/Coenders 2006 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5BMPO20090907_0535_13.JPG) Augrabies Falls, on the lower reaches of the Orange-Senqu River, South Africa. Source:Vogel 2009 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5BRPO20090905_0523_13.JPG) Irrigated agriculture is the single largest water user in the basin. Source:Vogel 2009 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5LLDSCN5765_130__1__1.JPG) Golden Gate Park, South Africa. Source:Hughes 2004 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E43BORANGESENQURIVERPR.JPG) Longitudinal profile of the main-stem of the Orange-Senqu River. Source:Hatfield 2009 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E42AORANGESENQU_RELIEF.JPG) Map of relief in the Orange-Senqu River basin. Source:Source: SRTM elevation data - CGIAR 2008 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E3TJLESOTHO_MAKHALENG_.JPG) Makhaleng River Gorges in the Highlands of Lesotho. Source:Pecher 2003 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E549PEDOSPHERE_130__1_.JPG) Pedosphere, the intersection between the Atmosphere, Biosphere, Hydrosphere and Lithosphere. Source:after Noorallah 2009; Mattson 1938 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E4IBORANGE_MIT_BLITZ_R.JPG) Lightning during a storm on the Lower Orange River. Source:Kruchem 2011 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E4OHHORSE_RIDING_1_130.JPG) The climate of Orange-Senqu River basin varies from snow in the winter in Lesotho... Source:Lesotho Water Commission 2008 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E3VLISTOCK_SPROETNIEK2.JPG) Sunset in the Kalahari. Source:iStockphoto/Sproetniek 2009 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E4FAHYDROLOGICAL_CYCLE.JPG) The Hydrologic (Water) Cycle. Source:Federal Interagency Stream Restoration Working Group 1998 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5BQPO20090909_0151_13.JPG) The climate of the Orange-Senqu River basin is highly variable. Source:Vogel 2009 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E2WUSOSSUSVLEI_NAMIBIA.JPG) An example of a B climate type - Sossusvlei Namibia. Source:Huber 2008 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E57MPICTURE_109_130__1.JPG) An example of a C climate type - Lesotho highlands. Source:Lesotho Water Commission 2003 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5QSP_16_130__1_274493.JPG) Southern Botswana receives very little annual rainfall. Source:Department of Water Affairs Botswana 2001 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5M9DSCF0115_130__1_17.JPG) Dams such as Vanderkloof can provide a buffer in drought conditions. Source:Pyke 2003 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5EOLWSIMS_081_130__1_.JPG) The altitude and mountains of the Lesotho Highlands ensure a temperate climate. Source:Lesotho Water Commission 2009 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E58SNAMA_KAROO3_130__1.JPG) The arid Nama Karoo. Source:DRFN 2004 ( click to enlarge ) |
![](_SYSTEM/WRITABLE/THUMBNAILCACHE/1Y2P0IJ32E5BTPO20090909_0004_13.JPG) Climate change will alter the availability of water. Source:Vogel 2009 ( click to enlarge ) |