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引用本文:崔承琦,印萍.岸坡地貌发育中耦合均衡理论的基本特征和意义.湖泊科学,1995,7(2):127-132. DOI:10.18307/1995.0204
Cui Chengqi,Yin Ping.Basic characteristics and significance of coupled equilibrium theory in submarine slope morphologic development. J. Lake Sci.1995,7(2):127-132. DOI:10.18307/1995.0204
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岸坡地貌发育中耦合均衡理论的基本特征和意义
崔承琦, 印萍
青岛海洋大学, 青岛 266003
摘要:
该理论模式将湖、海岸坡上的波场冲积物置于波场和重力场的耦合作用中。该区带地貌剖面在坡度和坡形上的响应性变化,使冲积物在其向、离岸振荡运动中形成振距耦合均衡势,与此同时,导致相对稳定的动力地貌均衡剖面的形成。本文提出耦合均衡的含义、条件及其均衡坡度θe和坡度梯度?θe/?x的表达式。该理论模式对认识湖、海岸环境中有关岸坡发育问题有一定意义。
关键词:  冲积物岸坡  波场-重力场耦合  地貌均衡剖面
DOI:10.18307/1995.0204
分类号:
基金项目:
Basic characteristics and significance of coupled equilibrium theory in submarine slope morphologic development
Cui Chengqi, Yin Ping
Ocean University of Qingdao, Qingdao 266003
Abstract:
The sediments moving on-off shore in wave field on lake-sea submarine slope are coupled by wave and gravity field. The net on-off shore displacement of the sediments leads to the changing of submarine morphological profile in slope and the gradient of slope. This is a morphological response process to external agent. The condition of coupling equilibrium profile is:ΔS1S2cosβ=0 ΔS3=±[(S4+-S5-)2-4S6(S7+-S8-)sinα+4S62]1/2 β=arctg[tga-2Sq/(Sa+-Sa-)cosα] There is an approximate relation between gradient of the slope in equilibrium (θe) and asymmetrical gradient of the oscQlating motion of sediments along the submaxine shore slope. ?θe/?x=?(Sa+-Sa-)/?x·R where, Sa——net displacement of sediment in a period of wave; Sax——net displacement of sediment in a period of wave in the direction perpendicular to shoreline; β——angle between displacement vector of sediment and the shoreline in a period of wave; α——angle between incident wave and shoreline;Sq——distance of sediments displacement caused by the gravity along the slope in half period of wave; Sa+——distance of onshore displacement of sediment caused by wave; Sa-——distance of offshore displacement of sediment caused by wave; R——coefficient (> 0)
Key words:  Submarine slope  couple fields  geomorphological equilibrium
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