The application of remote sensing data to diagnose soil degradation in the Dakhla depression – Western Desert, Egypt

Mohamed E. Hereher, Hossam Ismael

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Dakhla depression in Egypt’s Western Desert is experiencing two soil degradation processes, notably: soil salinization and sand encroachment. The present study aimed to diagnose the severity of these processes using remote sensing. Soil salinity was determined by spectral regression analysis between tasselled cap spectral transform extracted from a Landsat-8 image acquired in September 2013 along with synchronized soil salinity measurements. Assessment of sand advance rate was conducted by temporal change detection of brilliant crescentic sand dune visualized by Google Earth in old (2002) and recent (2013) images. Results showed that salinized soils (dS/m4<) represent 91% of bare lands and salinization is attributed to aridity, topography and poor drainage. Barchan dunes north and south of Abu Tartur escarpment moved at rates of 5.9 and 3.6 m/year, respectively. The escarpment protected the majority of the depression from massive dune invasion. However, sand encroachment is clearly observed west of the depression.

Original languageEnglish
Pages (from-to)527-543
Number of pages17
JournalGeocarto International
Volume31
Issue number5
DOIs
Publication statusPublished - May 27 2016

    Fingerprint

Keywords

  • arid lands
  • Dakhla
  • desertification
  • salinization
  • sand drift

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology

Cite this