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

Mohamed E. Hereher, Hossam Ismael*

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةمراجعة النظراء

7 اقتباسات (Scopus)

ملخص

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.

اللغة الأصليةEnglish
الصفحات (من إلى)527-543
عدد الصفحات17
دوريةGeocarto International
مستوى الصوت31
رقم الإصدار5
المعرِّفات الرقمية للأشياء
حالة النشرPublished - مايو 27 2016

ASJC Scopus subject areas

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