Print

华南海南岛河口三角洲形成的沉积物通量阈值（英文）

论文摘要

The knowledge of geomorphological evolution from an estuary to a river delta is necessary to form the formulation of comprehensive land-ocean interaction management strategies. In this study, the dominant factor controlling the geomorphological variability and the threshold sediment flux（TSF） to form a river delta in Hainan Island, southern China, including accommodation space, sediment supply, and reworking forces, was investigated by the method of big data analytics. The results indicated the 25 estuaries in consideration can be divided into three geographical groups, i.e. the multi-factors-controlled northern mixed estuaries, wave-dominated western estuaries with river deltas, and typhoon-dominated eastern coastal lagoon estuaries. For alluvial plain（AP） estuaries, the order of magnitude of TSFs is the smallest(101kt·yr–1), for barrier-lagoon（BL） ones is the highest(>102kt·yr–1), and for drowned valley（DV） ones is moderate(102kt·yr–1). The river deltas associated with DV systems should be relatively large, and those related to BLs should be small, with the AP deltas being between the above mentioned types. The present study provides a technique to evaluate the role played by TSF for the formation of river deltas in micro-tidal and wave-dominated and typhoon-influenced coastal environments.

论文目录

  • 1 Introduction
  • 2 Study area
  • 3 Methods
  •   3.1 Data sources
  •   3.2 Analytical methods
  •     3.2.1 Accommodation space identification
  •     3.2.2 Sediment flux estimation
  •     3.2.3 Hypsometry integral analysis
  •     3.2.4 Bed reworking forces analysis
  •     3.2.5 Estuarine geomorphological classification
  •     3.2.6 Threshold sediment flux analysis
  • 4 Results
  •   4.1 Accommodation space
  •   4.2 Estuarine sediment flux
  •   4.3 Characteristics of rework-ing forces
  •   4.4 Estuarine geomorphological identification
  •   4.5 Threshold sediment flux
  • 5 Discussion
  •   5.1 Dominant factor controlling the estuarine geomorphological variability
  •   5.2 Threshold sediment flux for the formation of river deltas
  • 6 Concluding remarks

    • 文章来源

    类型: 期刊论文

    作者: 李高聪,周亮,祁雅莉,高抒

    来源: Journal of Geographical Sciences 2019年01期

    年度: 2019

    分类: 基础科学

    专业: 地质学,地球物理学

    单位: Collaborative Innovation Center of South China Sea Studies, Nanjing University,State Key Laboratory for Estuarine and Coastal Research, East China Normal University,College of Electronics and Information Engineering, Guangdong Ocean University

    基金: National Natural Science Foundation of China,No.41530962,No.41706096,supports in part by the China Scholarship Council,No.201606190151

    分类号: P343.5;P512.2

    页码: 146-160

    总页数: 15

    文件大小: 835K

    下载量: 91

    相关论文文献

    本文来源: https://www.lunwen66.cn/article/2c215444b815e05005cb4b94.html