Agro-ecological zoning of wheat irrigation using geographic information systems and the analytical hierarchy process in Ilam province

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Vafa Parvane; BARARY MEHRSHAD; ALIZADEH YASER; FARAMARZI MARZBAN

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Journal: JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی) Year:2018 | Volume:8 | Issue:1 Page(s): 61-74

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Title

Agro-ecological zoning of wheat irrigation using geographic information systems and the analytical hierarchy process in Ilam province

Author(s)

Vafa Parvane | BARARY MEHRSHAD | ALIZADEH YASER | FARAMARZI MARZBAN | Issue Writer Certificate

Keywords

Environmental variablesQ2

temperatureQ2

precipitationQ2

GISQ2

AHPQ2

Abstract

Introduction: This study investigates land use suitability to find sustainable production areas in arid and semiarid regions. Crops perform best in locations where climatic conditions meet their growing requirements. Factors such as elevation, slope percentage, slope aspect, soil type, vegetation cover and other climatic features affecting growth are crucial in identifying the most suitable areas for crops. The trend of land suitability classification includes evaluating particular areas in terms of their aptness for a specific use (Seyedi Shahivandi et al., 2013). The suitability of farms in western Iran were evaluated for rain-fed wheat, while the climate parameters were studied in accordance with the eco-physiological needs of wheat. Finally, the areas were classified into suitable, semi-suitable and non-suitable regions (Kamali, 1996). In this study, geographic information systems (GIS) and the Analytical Hierarchy Process (AHP) were applied to evaluate the feasibility of the agricultural lands of Ilam Province for cultivation of irrigated wheat (Triticum aestivum L. ). Materials and methods: In this research, climatic parameters including temperature and rainfall were collected from seven synoptic stations of the region. Also compiled were data on important factors in zoning and environmental parameters including elevation, slope percentage, slope aspect, distance from river, soil texture, organic matter, the probability of the occurrence of appropriate temperatures during planting stage, the probability of the occurrence of the maximum temperature of 25° C during flowering, and the probability of the occurrence of temperatures of 30° C during the grain stage. First, the climatic data were extracted and Environmental variables were obtained, then the maps related to these parameters were drawn. Furthermore, the weight of each factor was calculated using AHP with the layers integrated into the GIS environment. Kriging and IDW methods were applied for interpolation of Environmental variables. Accordingly, a prospective map of irrigated wheat cultivation of the region was obtained. Lands were zoned into five classes: highly suitable, suitable, semi-suitable, non-suitable and highly non-suitable. Non-suitable lands seem to have extreme limitations and include those which should be used by farmers either rarely or never. Results and discussion: The results of AHP analysis showed that among the factors affecting land suitability, appropriate temperature during planting stage (0. 31) had the highest weight and elevation (0. 009) had the lowest weight. In the AHP model, the inconsistency ratio is about 0. 0346. This showed that the comparisons of factors were absolutely consistent (Bertolini et al., 2006), and the relative weights were adapted for applying land suitability analysis in our study area. The results indicated that about 34. 74% of lands were very suitable and 34. 74% were suitable. 13. 91% of lands had average capabilities of cultivation (semi-suitability). 16. 04% of the lands were poor and 8. 04% were very poor for irrigated wheat cultivation. The conclusion was that the role of each climatic and land parameter varies in different parts of the region. Moreover, it is possible to determine suitable regions for irrigated wheat using GIS and AHP method. Conclusion: In this research, the most effective factors determining the suitability of land for wheat were the appropriate temperature during sowing, the probability of the occurrence of the maximum temperature of 25° C during flowering, elevation and slope percentage. The results of this research confirmed the capability of GIS in zoning.

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APA: Copy

Vafa, Parvane, BARARY, MEHRSHAD, ALIZADEH, YASER, & FARAMARZI, MARZBAN. (2018). Agro-ecological zoning of wheat irrigation using geographic information systems and the analytical hierarchy process in Ilam province. JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی), 8(1 ), 61-74. SID. https://sid.ir/paper/397843/en

Vancouver: Copy

Vafa Parvane, BARARY MEHRSHAD, ALIZADEH YASER, FARAMARZI MARZBAN. Agro-ecological zoning of wheat irrigation using geographic information systems and the analytical hierarchy process in Ilam province. JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی)[Internet]. 2018;8(1 ):61-74. Available from: https://sid.ir/paper/397843/en

IEEE: Copy

Parvane Vafa, MEHRSHAD BARARY, YASER ALIZADEH, and MARZBAN FARAMARZI, “Agro-ecological zoning of wheat irrigation using geographic information systems and the analytical hierarchy process in Ilam province,” JOURNAL OF AGROECOLOGY (کشاورزی بوم شناختی), vol. 8, no. 1 , pp. 61–74, 2018, [Online]. Available: https://sid.ir/paper/397843/en

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