Limited water resources with gradual increase in water demand led to higher dependence on drainage water as one of the non-conventional water resources in Egypt. However, there was no precise approach for using such resource. The practices ranged between stopping lifting drainage water to main canals at many locations due to the water quality degradation in the drains and pure dependence on polluted drainage water by farmers. This implies the importance of applying the mathematical models that provide precise and flexible alternative for the dependence on the drainage water. This procedure could save the big investments that were used in the lifting stations while mitigating the environmental hazards. Cornell Mixing Zone Expert System (CORMIX) model is one of these mathematical simulation models. The study used surface discharge sub-model (CORMIX3) to define the mixing zone between the lifted drainage water from Mehalet Rough drain and the freshwater in Mit Yazid canal, by investigated biochemical oxygen demand (BOD) and total dissolved solids (TDS). The simulation results verified that the two investigated parameters met WQ standards for the Egyptian law 48/1982. BOD standard value was met after 448.36 m, in 723 s. TDS standard value was met after 4.46 m, in 7.8 s. This was far ahead of the first municipal station regardless low quality of these parameters in the drain. This is the first time to apply this model in the irrigation sector in Egypt, and the results were promising for defining the precise approach to reuse the drainage water in Egypt.

有限的水资源和用水需求的逐渐增加导致埃及对废水作为非常规水资源之一的依赖程度更高。但是，没有使用此类资源的精确方法。这些做法包括由于排水管中的水质恶化而停止在许多地方将排水排到主运河，以及农民完全依赖受污染的排水。这意味着应用数学模型的重要性，这些模型为对排水的依赖提供了精确和灵活的替代方案。该程序可以节省用于提升站的大量投资，同时减轻环境危害。康奈尔混合区专家系统 （CORMIX） 模型就是这些数学仿真模型之一。该研究使用地表排放子模型 （CORMIX3） 通过研究生化需氧量 （BOD） 和总溶解固体 （TDS） 来确定 Mehalet Rough 排水管的提升排水与 Mit Yazid 运河淡水之间的混合区。仿真结果验证了所研究的两个参数符合埃及法律 48/1982 的 WQ 标准。在 448.36 m 后，在 723 秒内达到 BOD 标准值。在 4.46 m 后，在 7.8 秒内达到 TDS 标准值。这远远领先于第一个市政站，尽管下水道中的这些参数质量低下。这是埃及首次将这种模型应用于灌溉部门，结果有望确定埃及排水再利用的精确方法。