
[地理] 辫状河;分汊河道;网状河道;辫状河川
The ore-hosting Yaojia Formation is composed of a set of braided stream medium-fine grained sediments.
姚家组为一套中细粒辫状河流沉积。
The reservoir of meandering stream and braided stream are widely distributed in the continental facies basin.
曲流河、辫状河储层在我国的陆相盆地中广泛分布。
Alluvial fan facies, braided stream delta facies and flooded plain facies are developed in Kongdian Formation of Bamianhe area.
八面河地区孔店组存在冲积扇、辫状河三角洲和洪泛平原相。
The fault subsidence lacustrine ***d out in late-Jurassic and damp type fan, braided stream and meander river sedimentary sequence was formed.
上侏罗统为断陷消亡期沉积,形成湿型扇—辫状河—曲流河沉积序列。
The results show that there are fan-delta deposit and braided stream deposit in th is area, they are further divided into 4 sub-facies and 9 micro-facies.
结果表明:研究区内为辫状河和扇三角洲沉积,进一步分为4种亚相,9种微相。
辫状河(Braided Stream) 是一种具有独特形态的河流类型,其河道被众多沙洲或江心洲分割成多条交织如辫、时分时合的汊道。这种河流通常出现在坡度较陡、流量变化大、河床沉积物以粗颗粒(如砂砾、卵石)为主的区域。其形成与维持依赖于三个关键因素:高输沙量、流量剧烈波动以及河岸抗侵蚀能力弱。当河流携带的泥沙量超过其输运能力时,多余的泥沙会在河道中堆积形成沙洲;而频繁的洪水或季节性流量变化会不断冲刷、改造这些沙洲的位置和形态,导致河道频繁分汊、迁移,最终形成辫状外观。
来源:美国地质调查局(USGS)河流地貌学基础指南
来源:国家地理学会(National Geographic Society)水文地貌词条
来源:剑桥大学地貌学实验室河流动力学研究
辫状河常见于以下环境:
“Braided stream”是地理学术语,指由多个交织的分支水道组成的河流形态,因形似编织的辫子而得名。以下是详细解释:
如提到的例句:“They wore their hair braided in long pigtails.”(他们将头发编成长辫子),通过类比说明河道分支的编织形态。
若需进一步了解具体案例或地质模型,可参考来源中的地理学文献或沉积相分析资料。
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