姚鹏程;夏春晨;梁慧;曹志先;

• 1:武汉大学水资源与水电工程科学国家重点实验室
• 2:浙江工业大学土木工程学院

摘要(Abstract)：

应用有限差分法离散分级恒定流数学模型和有限体积法离散非恒定流数学模型，以长江中游宜昌至汉口段为实例，对水位、流量、含沙量和河床冲淤量进行计算分析。结果表明：从上游至下游，分级恒定流数学模型与非恒定流数学模型的计算水位差异有减小的趋势，流量差异则逐渐增大，洪峰和沙峰到达时间比非恒定流数学模型的计算结果提前，含沙量、河床冲淤量和河床高程在部分断面与非恒定流数学模型的结果存在明显差异；随着计算河段的缩短，差异略有减小；随着计算历时的增加，河床冲淤量和河床高程计算差异持续增加。分级恒定流数学模型的计算耗时更长，且计算河段和历时越长，2个模型计算耗时相差越大。建议谨慎应用分级恒定流数学模型。

关键词(KeyWords)： 分级恒定流;非恒定流;水沙输移

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（编号：11672212）

作者(Authors): 姚鹏程;夏春晨;梁慧;曹志先;

DOI: 10.14188/j.1671-8844.2023-02-001

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