陡坡河道中淤积高度对水位变化影响试验研究
Experimental Study on the Effect of Siltation Height on Water Level Change in Steep Slope Channel
作者：钟益华(水力学与山区河流开发保护国家重点实验室 四川大学, 四川 成都 610065;四川大学 水利水电学院, 四川 成都 610065)；马旭东(水力学与山区河流开发保护国家重点实验室 四川大学, 四川 成都 610065;四川大学 水利水电学院, 四川 成都 610065)；聂锐华(水力学与山区河流开发保护国家重点实验室 四川大学, 四川 成都 610065;四川大学 水利水电学院, 四川 成都 610065)；刘兴年(水力学与山区河流开发保护国家重点实验室 四川大学, 四川 成都 610065;四川大学 水利水电学院, 四川 成都 610065)；郑晓刚(水力学与山区河流开发保护国家重点实验室 四川大学, 四川 成都 610065;四川大学 水利水电学院, 四川 成都 610065)
Author：ZHONG Yihua(State Key Lab. of Hydraulic and Mountain River Eng., Sichuan Univ., Chengdu 610065, China;College of Water Resource & Hydropower, Sichuan Univ., Chengdu 610065, China)；MA Xudong(State Key Lab. of Hydraulic and Mountain River Eng., Sichuan Univ., Chengdu 610065, China;College of Water Resource & Hydropower, Sichuan Univ., Chengdu 610065, China)；NIE Ruihua(State Key Lab. of Hydraulic and Mountain River Eng., Sichuan Univ., Chengdu 610065, China;College of Water Resource & Hydropower, Sichuan Univ., Chengdu 610065, China)；LIU Xingnian(State Key Lab. of Hydraulic and Mountain River Eng., Sichuan Univ., Chengdu 610065, China;College of Water Resource & Hydropower, Sichuan Univ., Chengdu 610065, China)；ZHENG Xiaogang(State Key Lab. of Hydraulic and Mountain River Eng., Sichuan Univ., Chengdu 610065, China;College of Water Resource & Hydropower, Sichuan Univ., Chengdu 610065, China)
收稿日期：2019-03-08 年卷（期）页码：2019,51(6):134-138
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：陡坡河道;模型试验;淤积;反坡水跃;水位
Key words：steep rivers;model test;siltation;adverse jump;water level
基金项目：国家自然科学基金青年基金项目（51809187）；国家重点研发计划项目（51639007）
中文摘要
在陡坡河道内，因输沙率变化可能会引起局部淤积，继而河道水位会随淤积高度相应变化。本文在4种比降水槽中，建立了可以模拟淤积体高度的概化模型，探求淤积高度对水位的影响。研究结果表明不同来流量条件下，在淤积高度增高与降低的过程中，水位会发生突增或突降，并且发生突增与突降时对应的淤积高度存在差异。淤积高度增加过程中，淤积体上游水位最大增幅可达6倍；淤积体降低过程中，水位恢复呈滞后性。通过线性回归得到了发生水位突变的临界淤积高度与来流水力学指标存在相关关系。以临界淤积高度为标准提出了的安全区、可能成灾区、成灾区的判断方法。本文的研究成果能够为水沙灾害防治中堤防设计、河道整治提供参考。
英文摘要
In a steep slope river, the local siltation may be caused by the change of sediment transport rate, and then the water level will change with the siltation height. In this paper, a generalized model for simulating the height of silt body was established in four kinds of specific slopes, and the effect of silt height on water level was explored. The results showed that under different inflow conditions, the water level will suddenly increased or fall in the process of increasing and decreasing the siltation height, and there were differences between the siltation height corresponding to the sudden increase and the sudden fall. In the course of increasing the silt height, the maximum increase of the upstream water level of the silt body could be up to 6 times, while in the course of decreasing the silt body, the recovery of the water level was delayed. Through linear regression analysis, the relationship between critical siltation height and hydraulic index of inflow was obtained. Based on the criterion of critical siltation height, the judgement methods of safe area, possible disaster area and disaster area are established. The research results can provide reference for river dike design and river regulation in flood for sediment disaster prevention.
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