Spatial Analysis of Soil Cover by Definition of Soil Stability Indicators for Flushing in the Upper
Shirvan Zone of Azerbaijan
RAE Z H Aliyev*
Institute of Erosion and Irrigation NAS of Azerbaijan, Baku
Submission: January 04, 2018; Published: January 11, 2017
*Corresponding author: RAE ZH Aliyev, Institute of Erosion and Irrigation NAS of Azerbaijan, Baku, Azerbaijan, Email: [email protected]
How to cite this article: RAE Z H A. Spatial Analysis of Soil Cover by Definition of Soil Stability Indicators for Flushing in the Upper Shirvan Zone of Azerbaijan. Glob J Oto 2018; 12(5): 555850.DOI:10.19080/GJO.2018.12.555850
The results of the research prove that the "soil layer” created in the database contains information on the types of soils, as well as their groups in the southern slopes of the foothills of Azerbaijan. Given the availability of cartographic materials, an analysis was also carried out for the Akhsu district as a research facility. The results are given in Tables 1 & 2, which provide information on the area of specific types of soils according to altitude intervals and grades of terrain slopes.
In Aksuinsky district the largest area is occupied by bright meadow-gray soils-more than 26% of the total area. Significant area is occupied also by meadow-gray soils-12% and gray- brown-almost 11%.Analyzing the distribution of soils along altitude intervals, it is established that at light up to 300 m above sea level, light meadow gray soils occupy 26% of the area, meadow-gray-12.3%, and gray-brown and light gray-meadow soils - 10 %.At an altitude of 300-600 m, mountain gray-brown soils occupy 4%, at an altitude of 600-900 m - washed mountain- brown almost 7% of the total area (Table 1). Depending on the humus content of the soil and its mineral composition, the soil stability index for flushing was calculated, which was subsequently used to determine the degree of erosion threat [1-14].
This indicator includes five degrees, where the 1-st stands for soils that are resistant to flushing, and the 5th is very weakly resistant. Based on the analysis of the data in the Akhsu region, it was found that the largest area is occupied by the soils resistant to flushing (1 degree of danger) -58% of the area as a whole. Very unstable to wash away the soil in the region is only 1.6%. The largest area of soils resistant to flushing (1 degree) is in the altitude range from 0 to 300 m. on slopes with a slope of 0-6%. Soils are 2 degrees of stability, i.e. well resistant to flushing, concentrated at an altitude of 300-800 m. with an incline of 10-18%. A significant area of land belonging to this degree of stability is also at an altitude of 100-200 maslong, with a slope of 0-6%. Most of the medium-resistant soils (grade 3) are in the altitude range of 100-300 m. with a slope of the terrain of 0-6% (Tables 2-7).
Weakly resistant soils to flushing (4th degree) occupy almost 71% of the area in the altitude range from 100 to 200 m. with a slope of 0-6%. Most of the soils are very unstable to flushing (grade 5) - more than 69%, are located on slopes with a slight slope of 0-6% and a height of 100 to 700 m.