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尾闾河道自组织过程动态模拟
Cellular model-based approach to self-organization channel formation in fluvial-deltaic systems

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黄翀 1   刘高焕 1   叶宇 1   宋创业 2  
文摘 河流尾闾改道后新河道的形成演化具有非线性复杂性。文中在元胞地貌演化模型框架下,提出一种改进后的多流路算法,基于简化的水流和沉积物运移规则,通过元胞间局部的相互作用,模拟河流尾闾改道后三角洲平原上的水沙运移及侵蚀/沉积过程,再现了新河道从无到有的突现特征以及微地形调整的复杂动态。对模型的敏感性分析表明,新河道的突现是三角洲河流-平原系统内在的自组织作用结果和本质特征。
其他语种文摘 Channel avulsion and evolution in deltaic plain tends to be complicated by a wide range of different types of non-linear processes.Understanding the ways in which channel development after avulsion is critical to tackling many geomorphologic and river management problems.In the paper,a cellular framework was used to explore the dynamics of new channel development processes after avulsion in a fluvial deltaic system.An improved multi-flow routing algorithm was integrated into the framework for modeling water and sediment across the landscape.Erosion and deposition caused by flowing water follow simple rules considering the slope between neighboring cells and other variables.Specifically,the algorithm allows for lateral transfer of water and sediment at angles of up to approximately 90° to the downstream direction.Modeling results appear able to reproduce many of the larger-scale emergent and self-organizing features observed in natural environment.This study demonstrates the utility of relatively simple algorithms to simulate complex emergence features of channel processes in fluvial-deltaic system.
来源 地学前缘 ,2011,18(3):324-330 【核心库】
关键词 河道 ; 元胞模型 ; 自组织 ; 突现 ; 模拟
地址

1. 中国科学院地理科学与资源研究所, 北京, 100101  

2. 中国科学院植物研究所, 北京, 100093

语种 中文
文献类型 研究性论文
ISSN 1005-2321
学科 地球物理学
基金 国家自然科学基金项目 ;  中国科学院资源与环境信息系统国家重点实验室开放研究基金
文献收藏号 CSCD:4233377

参考文献 共 30 共2页

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