Document Type : Research Paper

Authors

• khaled Hajimaleki ¹
• rouhollah mousavi ¹
• Manochehr Gorji ²
• Fereidon Sarmadian ³

¹ Student of Master of Soil Science, Soil Science Department, university of Tehran

² Associate of Soil Science, Soil Science Department, university of Tehran

³ Professor of Soil Science, Soil Science Department, university of Tehran

Abstract

Nowadays, the importance of soil conservation in agriculture and natural resources, with the goal of preventing its deterioration and degradation are necessary. Soil and land degradation as a direct cause of the threat to the global environment and human welfare is evident. In this study soil degradation mapping was carried out in East Qazvin. Soil map using geopedological method by integration of information layer of lithology, geomorphic and pedogenic was prepared in ArcGIS9.3 software. Data from soil maps with field studies was used as input in GLASOD model and the soil degradation map was prepared. In this study soil map units was used as basis of soil degradation status investigating in the region. Results showed that less than 25% of the study area has a low degree of degradation and in the present circumstances do not require specific management actions, but in other parts of the region, with various degrees of soil degradation was observed. Soil chemical properties degradation include decrease of soil organic matter, loss of soil nutrients and soil salinity are the most important aspects affecting on soil degradation of region. At total of 16,630 hectares of land, about 4028 ,5987, 5128 and 866 respectively low, middle, high and very high soil degradation class are located. Thus according to the results to prevent the spread of this process in this area, management actions is recommended.

Keywords

• Soil degradation
• Geopedological method
• GLASOD model
• Management of soil resources
• Soil degradation class