沙棘柔性坝拦沙效应的试验研究

发布时间：2018-11-04 16:12

【摘要】：在野外试验基地进行了沙棘柔性坝拦沙效应试验。基于试验数据,分析了不同含沙水流条件下沙棘柔性坝对沿程含沙量及出入口悬沙粒径分布的影响,并探讨了沙棘柔性坝的阻力特性。结果表明,沙棘柔性坝对不同含沙水流的拦沙效果显著不同,对原型沙B的拦截效果最好,其次为原型沙A,最后为模型沙。对250~1 000μm粒径范围内的原型沙拦截效果最佳,且原型沙含沙量与中值粒径之间呈现正相关关系,对100~1 000μm粒径范围内的模型沙的拦截效果较好。各不同含沙水流条件下的沿程含沙量主要受沙棘柔性坝阻力的影响。本研究有助于深入理解沙棘柔性坝的拦沙效应,并对沙棘植物柔性坝这一生态工程在砒砂岩区沟道的推广应用提供理论依据。
[Abstract]:The sand blocking effect of seabuckthorn flexible dam was tested in the field test base. Based on the experimental data, the influence of seabuckthorn flexible dam on sediment content and particle size distribution along the inlet and outlet of seabuckthorn flexible dam is analyzed, and the resistance characteristics of seabuckthorn flexible dam are discussed. The results show that the effect of seabuckthorn flexible dam on sediment retention of different sediment bearing flows is significantly different, and the interception effect of prototype sand B is the best, followed by prototype sand A and model sand. The intercepting effect of the prototype sediment is the best in the range of 250 渭 m sand diameter of 1 000 渭 m, and there is a positive correlation between the sediment content of the prototype sediment and the median particle size, and the interception effect of the model sand in the range of 100 ~ 1 000 渭 m diameter is better. The sand content along the course is mainly affected by the resistance of seabuckthorn flexible dam under different sediment flow conditions. This study is helpful to understand the sand blocking effect of seabuckthorn flexible dam and to provide the theoretical basis for the application of seabuckthorn flexible dam in the channel in the arsenopyst region.
【作者单位】： 西北大学城市与环境学院;西安理工大学水利水电学院;
【基金】：国家自然科学基金项目(51279163) 西北旱区生态水利工程国家重点实验室培育基地项目(2016KFKT-4) 陕西省自然科学基金项目(2010JQ5003)
【分类号】：S157.433
，

本文编号：2310391