To facilitate understanding and decision making in the food-energy-water (FEW) nexus context, we develop an integrated technology-environment-economics model (ITEEM) at a watershed scale. ITEEM is built as an integration of various models, including models for grain processing, drinking water treatment, and wastewater treatment (technology); a watershed model for hydrology, water quality, crop production, and nutrient cycling (environment); an economics model assessing total benefit, including non-market valuation of environmental benefits. Different data techniques are applied to develop suitable surrogates for computer-based models, including a response matrix method, artificial neural networks, and lookup tables. Empirical equations are applied to develop models of economics and drinking water treatment. The input-output relationships between the models are formulated in a unified computational framework. ITEEM, a spatially semi-distributed dynamic simulation model, can be used to quantify the environmental and socioeconomic impacts of various management practices, technologies, and policy interventions on FEW systems in the Corn Belt.

为了促进在食品-能源-水（FEW）关系范围内的理解和决策，我们在分水岭规模上开发了集成的技术-环境-经济模型（ITEEM）。ITEEM是各种模型的集成，包括谷物加工，饮用水处理和废水处理（技术）模型；水文，水质，作物生产和养分循环（环境）的分水岭模型；评估总收益（包括对环境收益的非市场评估）的经济学模型。应用了不同的数据技术来开发适用于基于计算机的模型的代理，包括响应矩阵方法，人工神经网络和查找表。将经验方程式用于建立经济学和饮用水处理模型。模型之间的输入-输出关系在统一的计算框架中制定。ITEEM是一种空间半分布式动态仿真模型，可用于量化各种管理实践，技术和政策干预对玉米带FEW系统的环境和社会经济影响。