عنوان المقالة:تأثير دراسة واجهة الانحدار في خصائص القشرة البايولوجية لبعض الترب الجبسية باستخدام الاستشعار عن بعض ونظم المعلومات الجغرافية IMPACT STUDY OF SLOPE ASPECT IN THE BOILOGICAL CRUST PROPERTIES OF SOME GYPSIFEROUS SOILS USING REMOTE SENSING AND GIS
أياد عبد الله خلف الدليمي ، صلاح الدين حمادي مهدي الطائي ، عمار سعدي إسماعيل
المؤلفون بالإنجليزي
Aiad Abdullah Khalaf AL-Duliami, Salahaldeen H. Altai and Ammar S. Ismaeal
الملخص الانجليزي
This study conducted on gypsiferous to investigate the effect of the slope aspect in the biological crust of some gypsiferous
soils using remote sensing. The field work involves selection of two Hills (top, middle, under slope) both from south and
north aspect. A three replicates of soil sample from biological and under biological crust were taken, and photo vertically at
1 meter height by a digital camera. laboratory analysis of the samples involve the biological and chemical soil properties such
as (bacterial number, fungi, algae, mycorrihza, pH, EC, CaCO3, CaSO4.2H2O, available N, available P, O.M. and soluble ionic
(Ca++, Mg++, Na+, K+, CO3
—, HCO3
-, CL-, SO4
— ). Office work, include digital processing of the satellite image by ERDAS
program, calculation spectral reflectance and other indicators (CI, BSCI, BCDI, BI, WI, CNI, B/(G+R), B2/B7, B4/B7, B5/B7)
which explain biological crust status and degradation degree (slightly, moderate, sever). The results refer to clear effect of
slope aspect in the optical, chemical and biological properties. The number of bacteria, fungi, algae, available N, available P
and organic matter were increased in the hills top and North aspect, while the EC, CaSO4.2H2O were increase in south aspect.
In addition, the spectral indices (B/(R+G), B2/B7, B4/B7) were decreased in north aspect. Whereas BCDI, R/(G+B) indicators
were increased in the south aspect and through indices maps showed a biological crust suffer from sever degradation.
د.عمار سعدي إسماعيل يحيى | Dr.ammar saadi Ismaeal yahya | 9055