Priority of different irrigation systems using parametric method in Ahar region

Authors

1 Former MSc Student, Dept.Soil Science, Faculty of Agriculture, University of Tabriz, Iran.

2 Associate, Prof, Dept. Soil Science, Faculty of Agriculture, University of Tabriz, Iran.

3 Prof, Dept. Soil Science, Faculty of Agriculture, University of Zabol, Iran.

4 Associate, Prof., Dept.Water Engineering, Faculty of Agriculture, University of Tabriz, Iran.

Abstract

Prioritizing different types of irrigation systems is essential for proper management of soil and water resources in the south of Ahar (9000 hectares). For this purpose, the physical and chemical properties of 44 soil profiles (soil texture, depth, lime, gypsum, salinity and alkalinity) were used and the ability of the soil to be irrigated using the limitations system as well as the suitability of the study area for the drip, sprinkler and surface irrigation systems were determined by parametric method. The application of the limitation system results showed that soil and topography were the most important limiting factors and the irrigation capacity of the study area was in classes III (arable land) and IV (limited arable land) with approximate extension of 75% and 25% respectively. Based on the results of the parametric method for surface irrigation application, only 4% of the land is classified as S1 (highly suitable) and S2 (suitable), S3 (relatively suitable), N1 (almost non-suitable) and N2 (non-suitable) with extension of about 31%, 46%, 17% and 2% in the study area. In addition, the southern parts of the area were not suitable for surface irrigation due to the high slope, and the lands for sprinkler and drip irrigation classified in S2 and S3 classes and covers 70% and 25% of the study zones and so the rest of the lands are more susceptible to sprinkler irrigation than drip ones. Based on prepared maps, about 5000 hectares of lands

Keywords


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