Satellite mapping of Nile Delta coastal changesMultitemporal, multispectral scanner (MSS) landsat data have been used to monitor erosion and sedimentation along the Rosetta Promontory of the Nile Delta. These processes have accelerated significantly since the completion of the Aswan High Dam in 1964. Digital differencing of four MSS data sets, using standard algorithms, show that changes observed over a single year period generally occur as strings of single mixed pixels along the coast. Therefore, these can only be used qualitatively to indicate areas where changes occur. Areas of change recorded over a multi-year period are generally larger and thus identified by clusters of pixels; this reduces errors introduced by mixed pixels. Satellites provide a synoptic perspective utilizing data acquired at frequent time intervals. This permits multiple year monitoring of delta evolution on a regional scale.
Document ID
19900059388
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Blodget, H. W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Taylor, P. T. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Roark, J. H. (Maryland, University College Park, United States)