Determining the Effectiveness of Using Remote Sensing Indices to Deriving Sabkhas in Wadi An-Natrun Depression – Egypt | ||||
| مجلة کلية الآداب .جامعة بورسعيد | ||||
| Article 25, Volume 19, Issue 19, January 2022, Page 179-205 PDF (2.19 MB) | ||||
| Document Type: المقالة الأصلية | ||||
| DOI: 10.21608/jfpsu.2021.90727.1124 | ||||
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| Author | ||||
إسلام صابر أمين دسوقي 
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| قسم الجغرافيا ونظم المعلومات الجغرافية، کلية الآداب، جامعة بنها ،بنها، مصر | ||||
| Abstract | ||||
| Abstract The floor of Wadi An-Natrun Depression has a high level of salinity and occupies by a shallow salt lakes, which are characteristic geomorphologic landforms. In general, Wadi An-Natrun Depression is characterized by very arid climate. The geological formations of Wadi An-Natrun Depression range from lower Miocene, lower Pliocene and Quaternary deposits. This study attempts to determine the effectiveness of using remote sensing indicators in deducing sabkhas in the Wadi El-Natrun depression utilizing Landsat 8 OLI satellite images based on field data of laboratory analyzes of sabkhas soil samples collected through the field study. To achieve this, linear and multiple regression models were applied between soil salinity and electrical conductivity (ECe) on the one hand and remote sensing indices on the other hand, where the NDSI index had the highest correlation coefficient of 0.872. This was followed by the derivation of the Enhanced soil salinity index from (NIR), (SWIR) 2 and the NDVI index, which had higher correlation than NDSI with electrical conductivity (ECe) of 0.918 . المستخلص باللغة العربية يتميز قاع منخفض وادي النطرون بمستوى عالٍ من الملوحة وتحتله بحيرات ملحية ضحلة والتي تعد من أهم المظاهر الجيمورفولوجية بالمنخفض ، وبصفة عامة فإن مناخ منخفض وادي النطرون يتسم بشدة الجفاف ، تتراوح التکوينات الجيولوجية بالمنخفض بين الميوسين الأسفل والبليوسين الاسفل بالإضافة إلي رواسب البليستوسين والحديث . تحاول هذه الدراسة تحديد فاعلية استخدام مؤشرات الاستشعار عن بعد في استنباط السبخات بمنخفض وادي النطرون باستخدام صور القمر الصناعي لاندسات 8 OLI إرجاعاً إلي بيانات فعلية للتحليلات المعملية لعينات تربة السبخات والتي تم جمعها من خلال الدراسة الميدانية . ولتحقيق ذلک ، تم تطبيق نماذج الانحدار الخطي والمتعدد بين ملوحة التربة والتوصيل الکهربائي (ECe) من ناحية ومؤشرات الاستشعار عن بعد من ناحية اخري ، حيث کان لمؤشر NDSI أعلى معامل ارتباط قدره 0.872. ، تبي ذلک اشتقاق مؤشر ملوحة التربة المحسن بالاعتماد علي النطاقات الطيفية (NIR) و (SWIR) 2ومؤشر NDVI ، و کان لهذا المؤشر ارتباط أعلى من NDSI مع التوصيل الکهربائي (ECe) بلغ 0.918. | ||||
| Keywords | ||||
| الاستشعار عن بعد; مؤشرات الملوحة; وادي النطرون; Remote sensing; salinity indices; Wadi An-Natrun; depression; sabkha; salt lakes | ||||
| References | ||||
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