关于已建水利工程经济后评价的问题，在我国现有的专业技术规范中都还没有详细叙述。

How to evaluate the economic benefit of hydraulic engineering under operation that has not been considered in detail in present technique specifications.

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应用数学模型研究船舶在航道中的航行条件，可以经济、快速了解水利工程兴建后，其对船舶航行的影响。

Researching the conditions of navigation in sea route and realizing the influences to navigation of hydraulic engineering by mathematical model are speedy and economic.

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可以为流域实时洪水预报和水库实时调度提供科学数据，从而提高水利工程的社会效益和经济效益。

It has provided scientific data for real-time flood forecasting in the basin and reservoir scheduling, and improved social and economic benefit of water conservancy project.

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