The state of Qatar is challenged by food insecurity due to its limited water resources. Considering its large industrial infrastructure and municipal water usage, treated wastewater with varying nutritional content can alleviate the stress on groundwater resources and enhance food production. Using an energy-water-food nexus approach, this study presents a planning framework that identifies the optimum allocation of 13 sources of treated wastewater to be used in cultivating alfalfa, achieving reductions in greywater footprint, energy for transportation, and carbon footprint. The treated wastewater sources are allocated according to their nitrogen-phosphorus-potassium contents to meet alfalfa requirements while respecting irrigation water standards. Results demonstrate that treated wastewater optimally provides the water and nutrient requirements to both farms. Greywater footprint, energy for transportation, and carbon footprint associated with the growth of 1 ton of alfalfa are found to be -917m³, 70 kWh and -34kg-Co_2,eq for Er-rakhiya farm, and -1,770m³, 68 kWh and -18kg-Co_2,eq for Wadi Al Araig farm.

卡塔尔州因水资源有限而面临粮食不安全的挑战。考虑到其庞大的工业基础设施和市政用水，各种营养成分的处理后的废水可以减轻对地下水资源的压力并提高粮食产量。本研究使用能量-水-食物关系方法，提出了一个规划框架，该框架确定了用于苜蓿种植的13种经处理废水的最佳分配，从而减少了灰水足迹，运输能源和碳足迹。处理后的废水源根据其氮磷钾含量进行分配，以满足苜蓿的要求，同时遵守灌溉用水标准。结果表明，经过处理的废水可以为两个农场提供最佳的水和养分需求。与1吨苜蓿的生长相关的灰水足迹，运输能源和碳足迹为-917m³，70千瓦时，-34kg钴_2，EQ为尔rakhiya农场，-1,770m ³，68千瓦时，-18kg钴_2，当量为干河Araig农场。