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高扬程灌区，作物种植结构与水量供给互为制约关系，在市场经济条件下，作物种植向高产、优质、高效益方向发展，最终实现社会保障体系和市场调解体系，经济效益最大；而水资源最大可能满足作物生长需水，与供水量达到极限时，种植结构趋于稳定，此时经济效益最佳。自发调解此过程，需要较长时间，但在现代科学技术条件下，应用系统工程原理，找出种植结构最优化方案，预测和实现此方案，都将成为可能，以此为目的进行研究，为领导、决策者和生产者应用提供科学依据。
In the high-lift irrigation area, crop cultivation structure and water supply are mutually restrictive. Under the market economy, crop cultivation will develop in the direction of high yield, high quality and high benefit, and finally achieve social security system and market mediation system with the greatest economic benefits. However, The maximum possible to meet the crop water needs, and water supply reached the limit, the planting structure tends to be stable, this time the best economic benefits. It takes a long time to spontaneously mediate this process, but under the condition of modern science and technology, it is possible to find out the optimal plan of planting structure by applying the principle of system engineering. It is possible to predict and realize this plan. Leadership, decision-makers and producers to provide scientific basis for the application.