{"title":"冰谷剖面演化的数值模拟","authors":"H. Seddik, S. Sugiyama, R. Naruse","doi":"10.14850/JSSI.2004.0.138.0","DOIUrl":null,"url":null,"abstract":"A numerical model for glacial-valley cross-section evolution has been developed. The model allows the simulation of the development of U-shaped valleys by coupling an ice flow model in a transverse section with an erosionmodel. The core of the cross-section development model is the calculation of the two-dimensional flow speed field in a transverse cross-section considering the lateral drag from glacier side walls and the basal-stress dependent sliding speed. Assuming that the glacial erosion is a quadratic function of the sliding speed, the model shows rapid evolution of a V-shaped profile into a recognizable glacial form with sliding velocities ranging from 3 m a - 1 to 8 m a - 1 .","PeriodicalId":9345,"journal":{"name":"Bulletin of glaciological research","volume":"22 1","pages":"75-79"},"PeriodicalIF":1.0000,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"Numerical simulation of glacial-valley cross-section evolution\",\"authors\":\"H. Seddik, S. Sugiyama, R. Naruse\",\"doi\":\"10.14850/JSSI.2004.0.138.0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A numerical model for glacial-valley cross-section evolution has been developed. The model allows the simulation of the development of U-shaped valleys by coupling an ice flow model in a transverse section with an erosionmodel. The core of the cross-section development model is the calculation of the two-dimensional flow speed field in a transverse cross-section considering the lateral drag from glacier side walls and the basal-stress dependent sliding speed. Assuming that the glacial erosion is a quadratic function of the sliding speed, the model shows rapid evolution of a V-shaped profile into a recognizable glacial form with sliding velocities ranging from 3 m a - 1 to 8 m a - 1 .\",\"PeriodicalId\":9345,\"journal\":{\"name\":\"Bulletin of glaciological research\",\"volume\":\"22 1\",\"pages\":\"75-79\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2004-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bulletin of glaciological research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.14850/JSSI.2004.0.138.0\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOGRAPHY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of glaciological research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14850/JSSI.2004.0.138.0","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOGRAPHY, PHYSICAL","Score":null,"Total":0}
引用次数: 4
摘要
建立了冰谷剖面演化的数值模型。该模型通过将横截面冰流模型与侵蚀模型耦合，可以模拟u型山谷的形成。截面发展模型的核心是考虑冰川侧壁侧向阻力和基底应力相关滑动速度的横向截面内二维流速场的计算。假设冰川侵蚀是滑动速度的二次函数，该模型显示了一个v形剖面快速演变为一个可识别的冰川形式，滑动速度在3 ~ 8 m a - 1之间。
Numerical simulation of glacial-valley cross-section evolution
A numerical model for glacial-valley cross-section evolution has been developed. The model allows the simulation of the development of U-shaped valleys by coupling an ice flow model in a transverse section with an erosionmodel. The core of the cross-section development model is the calculation of the two-dimensional flow speed field in a transverse cross-section considering the lateral drag from glacier side walls and the basal-stress dependent sliding speed. Assuming that the glacial erosion is a quadratic function of the sliding speed, the model shows rapid evolution of a V-shaped profile into a recognizable glacial form with sliding velocities ranging from 3 m a - 1 to 8 m a - 1 .
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