فهرست مطالب v. shahrokh

Land suitability evaluation is the fitness of a given tract of land based on its production potential for a defined use. This study was conducted to evaluate the land suitability of Mobarakeh-Zarrinshahr district located in west of Isfahan province using Analytical Hierarchy Process (AHP) technique. To do the evaluation, firstly the hierarchy structure was established, which consisted of objectives, criteria, sub-criteria and alternatives. The objective was determination of landuse priority in each land unit; the criteria comprised of soil suitability, climate suitability, gross income, market accessibility, water resources availability, physical environmental-impacts and chemical environmental-impacts; two alternative landuse types were chosen to be cultivation of rice and establishment of greenhouse. The questionnaires were filled out by experts and then the overall weight for each element at each level was calculated by multiplying its local weight, obtained from Expert Choice 2000 software. The results showed that climate suitability and market accessibility had the highest and least weights, respectively, for selection of the proper land use, and the inconsistency ratio was 9%. In all the land units, the greenhouse establishment had higher priority. Climate suitability and gross income were identified the major factors affecting the suitability for greenhouse establishment. In general, cultivation of rice is not recommended in the studied area, because of negative environmental impacts including soil physical-destruction, low water use efficiency, raising the groundwater levels and increasing soil salinity.

Land suitability evaluation is the fitness of a given tract of land based on its potential for a defined use. The objective of this study were to define the qualitative, quantitative and economical land suitability evaluation of Zarrinshahr and Mobarakeh located at the west of Isfahan province and assessment the environmental impacts of the questioned land utilization types. The economical evaluation included collecting the economical data, comparison of inputs and outputs and analysis of gross income. Potential yield was calculated using the method proposed by F.A.O. The result of potential yield analysis showed that the potential yields were determined 9.01 and 11.01 t/ha for wheat and rice production, respectively. The quantitative land evaluation and their classes were defined according to incorporating observed yield and marginal yield with the qualitative evaluation results. The predicted yield varied from 1.3 to 6.7 and from 0.7 to 4.6 t/ha for wheat and rice, respectively. High correlation between the observed yield and predicted yield indicated the appropriate selection of the factors and evaluation approach. Based on the quantitative evaluation, most of the land unit’s wheat was identified that had more suitability in the study area. The cultivation of rice is not recommended in the study area, because of negative environmental impact including soil physical destruction, non-efficient water consuming, arising of ground water surface and increasing soil salinity.