【摘要】：在野外試驗基地進行了沙棘柔性壩攔沙效應(yīng)試驗�；谠囼灁�(shù)據(jù),分析了不同含沙水流條件下沙棘柔性壩對沿程含沙量及出入口懸沙粒徑分布的影響,并探討了沙棘柔性壩的阻力特性。結(jié)果表明,沙棘柔性壩對不同含沙水流的攔沙效果顯著不同,對原型沙B的攔截效果最好,其次為原型沙A,最后為模型沙。對250~1 000μm粒徑范圍內(nèi)的原型沙攔截效果最佳,且原型沙含沙量與中值粒徑之間呈現(xiàn)正相關(guān)關(guān)系,對100~1 000μm粒徑范圍內(nèi)的模型沙的攔截效果較好。各不同含沙水流條件下的沿程含沙量主要受沙棘柔性壩阻力的影響。本研究有助于深入理解沙棘柔性壩的攔沙效應(yīng),并對沙棘植物柔性壩這一生態(tài)工程在砒砂巖區(qū)溝道的推廣應(yīng)用提供理論依據(jù)。
[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.
【作者單位】： 西北大學(xué)城市與環(huán)境學(xué)院;西安理工大學(xué)水利水電學(xué)院;
【基金】：國家自然科學(xué)基金項目(51279163) 西北旱區(qū)生態(tài)水利工程國家重點實驗室培育基地項目(2016KFKT-4) 陜西省自然科學(xué)基金項目(2010JQ5003)
【分類號】：S157.433
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本文編號：2310391