Saharan desert rivers, satellite image

2003 21st century advanced spaceborne aerial photography aerial africa arid aster image bani river delta desert dry earth observation earth science environment february from space geography hot hydrology infrared inland niger delta inner niger delta ir land landsat 7 mali malian nature niger river niger physical geography reflection radiometer river delta river riverine rocky sahara saharan sandy satellite image satellite photography satellite view satellite terra thermal emission and usgs water waterway wetland