حسين اكبري وارياني

In today's world, economic and social development is almost impossible without considering the importance of food. It is for this reason that the countries of the world have developed many programs for the production of their products and food products. In this thesis, due to the importance of the subject, the expansion and development of a simulator model for the food subsystem, taking into account the requirements of the nexus approach for planning and decision-making in this system, was discussed. The food simulation model is categorized by considering the parameters, independent variables, as well as correlated variables and, is expanded and developed in the framework of online and stand-alone interaction. Also, the eva‎luation indices of the cultivation pattern were calculated with the nexus approach. By developing such a model for the food subsystem with the water-energy-food nexus approach, the decision makers can check the policies related to the optimal cultivation pattern by using the eva‎luation indicators with the nexus approach. The Maragheh-Bonab study area of the Urmia Lake catchment area was selected to conduct this research in the statistical period of 2005-2015. Using model eva‎luation criteria, the results of model validation and verification showed that the developed model works with appropriate accuracy. The results of the simulation showed that the highest and lowest water consumption indicators are related to dry wheat and chickpea crops, respectively, which have an average amount of 6674 and 1810 cubic meters per hectare, respectively. The highest and lowest indicators of energy consumption are related to potatoes and rainfed chickpea, respectively. The average energy consumption index of these crops is 222,766 and 19,500 megajoules per hectare, respectively. Other results of the simulation showed that the highest and lowest water efficiency index is related to irrigated potato and irrigated wheat crops, respectively, which have an average amount of 6241466 and 168683 calories per cubic meter, respectively. The highest and lowest energy efficiency index is related to irrigated potato and irrigated onion, respectively. The energy efficiency index of these products is equal to 88321 and 366864 calories per megajoule, respectively. The results of other indicators showed that the highest and lowest water economic productivity indicators are related to irrigated potato and irrigated wheat crops, respectively, which have an average value of 39144 and 4100 rials per cubic meter, respectively. The highest and lowest energy economic efficiency indicators are related to irrigated onion and rainfed wheat, respectively. The economic energy efficiency index of these products is equal to 4778 and 204 rials per megajoule, respectively.

همبست آب، انرژي و غذا , شاخص هاي همبست آب، انرژي و غذا , شبيه‌سازي رشد محصول , AquaCrop , شبيه‌ساز جامع سامانه غذا

Water, Energy and Food Nexus , Water, Energy and Food Nexus Indicators , Crop Growth Simulation , AquaCrop , Comprehensive Food System Simulator

Hossein Akbari Variani

Dr. Abbas Afshar , Dr. Motahareh Saadatpour