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中文摘要：
为分析小南海水电站日调节对下游航运的影响，使用Saint-Venant偏微分方程组和Preissmann隐格式差分方法，建立了一维非恒定流水动力学模型，并以实测水文数据对模型进行了校核和验证。采用该模型模拟了小南海水电站日调节工况时下游水流条件，并与拟定的通航条件进行了对比分析，结果表明，按照电网载荷拟定的日调节工况运行会造成坝下游水流条件恶化，从而降低枯水期库区通航能力；有必要对电站日调节运行方式进行调整，或者对下游河段进行整治。
英文摘要：
In order to analyze the shipping influence caused by Xiaonanhai Hydropower Station,in the article, the Saint-Venant partial differential equations are used together with Preissmann implicit difference for building a one-dimensional unsteady flow hydrodynamics model and the model was verified with the observed hydrological data. By simulating hydrodynamics for the daily regulation, the capacity of navigation in the lower reach are estimated. The simulating results show that the situation might deteriorate the flow condition in downstream in the case of daily regulation whose operating rules were formulating from the side of load, thereby impair the navigation during the low-flow phase. It is necessary to adjust the operating rules of power station or implement river regulation works for the lower reach after dam.
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