基于地貌形态学交融的现代曲流河道迁移构型表征
- 1. 长江大学油气资源与勘探技术教育部重点实验室, 武汉 430100;
- 2. 长江大学地球科学学院, 武汉 430100;
- 3. 中国地质大学能源学院, 北京 100083;
- 4. 北京大学地球与空间科学学院, 北京 100871;
- 5. 大庆油田采气分公司, 黑龙江大庆 163000
基金项目:
国家自然科学基金项目（41372125）；国家科技重大专项（2016ZX05063002-006）
作者简介:
林志鹏,男,1993年出生,硕士,河流沉积学、河流地貌形态学、储层构型与不整合结构,E-mail:linzp93@yangtzeu.edu.cn
- 收稿日期:
2017-05-19
- 修回日期:
2017-08-22
- 刊出日期:
2018-06-10
摘要: 曲流河道地貌迁移规律是重建与恢复古河道储层构型与历史演变的基础，是预测未来迁移演化趋势的前提，目前正成为国际河流沉积演化研究的热点。通过地貌形态学与河流沉积学的学科交融，以额尔齐斯河和诺威特纳河两条典型天然曲流河道为研究对象，结合Google Earth和ACME Mapper技术获取高分辨率历史卫星图像，提出现代曲流河道地貌迁移构型表征新方法与思路。在前人基础上，综合采用28种刻画要素对曲流河道平面构型进行层次解剖，更加精准定义弯度指数（S）与曲率（C），并首次运用3种新构型表征参数：上游偏转角（Δθ）、下游偏转角（Δθ'）和扩张系数（KM），实现曲流河道迁移构型表征的定量过程学分析。通过对12条优选典型河曲的构型刻画，表征6种迁移结构：对称扩张、上游旋转扩张、下游旋转扩张、对称收敛、上游旋转收敛和下游旋转收敛结构，归纳出9种迁移模式，并结合地貌过程学定量表征思路，探讨其对现今地下储层构型方法的重要指导意义，以期推进河流地貌形态学与河流沉积学的共同发展。
Geomorphology Processes of Channel Planform Migration on Modern Meandering Rivers
- 1. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Wuhan 430100, China;
- 2. School of Geosciences, Yangtze University, Wuhan 430100, China;
- 3. School of Energy Resources, China University of Geosciences, Beijing 100083, China;
- 4. School of Earth and Space Sciences, Peking University, Beijing 100871, China;
- 5. Gas Production Company of Daqing Oilfield Limited Company, Daqing, Heilongjiang 163000, China
Funds:
National Natural Sciences Foundation of China, No. 41372125; National Science and Technology Major Project, No.2016ZX05063002-006
- Received Date:
2017-05-19
- Rev Recd Date:
2017-08-22
- Publish Date:
2018-06-10
Abstract: Geomorphological migration structures are the basis to reconstruct and restore sedimentary evolution of the paleochannel, as well as the premise to forecast migration trend of rivers. In order to figure out the regularity of geomorphology migration structures of meandering rivers, high-resolution historical satellite images are acquired primarily through Google Earth and ACME Mapper. Through the fine feature characterization for the Irtysh River and the Nowitna River, which are both well in preservation conditions of natural structures, 28 kinds of structure elements are utilized to depict the meandering channels. Moreover, 5 kinds of characterization parameters are proposed to make quantitative description on the channel structure, extraordinarily, the difference of along-current deflection angle (Δθ), the difference of counter-current deflection angle (Δθ'), and expansion coefficient (KM) are firstly brought forward and applied for introduction. In addition, the conception of sinuosity index (S) and curvature (C) are also different from previous original definition and more meticulous. By fine anatomy of the structure for 12 typical meander loops, S, C, Δθ, Δθ', KM factors are adopted to summarize for 6 kinds of planform migration structures:symmetrical expansion structure, upstream rotation expansion structure; downstream rotation expansion structure; symmetrical constriction structure; upstream rotation constriction structure; downstream rotation constriction structure. Ultimately, 9 meandering channel migration patterns are concluded and discussed. Combined with the idea of geomorphological quantitative characterization, the evolution of the meandering river has a certain degree of universal law and guiding role in order to promote the landscape morphology and fluvial sedimentology of common development.
林志鹏, 单敬福, 陈乐, 孙千军, 王义武, 汪菲. 基于地貌形态学交融的现代曲流河道迁移构型表征[J]. 沉积学报, 2018, 36(3): 427-445. doi: 10.14027/j.issn.1000-0550.2018.045
LIN ZhiPeng, SHAN JingFu, CHEN Le, SUN QianJun, WANG YiWu, WANG Fei. Geomorphology Processes of Channel Planform Migration on Modern Meandering Rivers[J]. Acta Sedimentologica Sinica, 2018, 36(3): 427-445. doi: 10.14027/j.issn.1000-0550.2018.045
| Citation: |
LIN ZhiPeng, SHAN JingFu, CHEN Le, SUN QianJun, WANG YiWu, WANG Fei. Geomorphology Processes of Channel Planform Migration on Modern Meandering Rivers[J]. Acta Sedimentologica Sinica, 2018, 36(3): 427-445. doi: 10.14027/j.issn.1000-0550.2018.045
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