Long-term process-based morphodynamic modeling of the Pearl River Delta
Long-term process-based morphodynamic modeling of the Pearl River Delta
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DOI：
10.1007/s10236-014-0785-7
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发表时间：
2014-10
期刊：
影响因子：
2.3
通讯作者：
Xing Wei;Chao-yu Wu
中科院分区：
文献类型：
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作者：
Xing Wei;Chao-yu Wu
珠江三角洲是我国最复杂的大型河口系统之一。建立了一个长期的形态动力学模型，模拟了珠江三角洲及其河口系统的演变。模型中考虑的驱动力和控制因素包括河流流量、代表性潮汐和珠江水系的泥沙供应、泥沙压实、新构造运动和海平面变化。用40个点的14C测年岩心数据对模型进行了验证，结果令人满意。珠江三角洲中全新世演化的新发现表明，该三角洲的时空演化模式与以往研究中的有所不同。该模型证实，复杂的形态，例如，浅河口湾中的岩石岛屿，是影响珠江三角洲长期演变的一些最重要的因素。
The Pearl River Delta (PRD) is one of the most complex large-scale estuarine systems in China. A long-term morphodynamic model is developed to simulate the evolution of the PRD and its estuarine system. The driving forces and control factors considered in the model include river discharge, representative tides, and sediment supply from the Pearl River system; sediment compaction; neotectonic movement; and sea-level variation. Core data with14C dating at 40 locations are used to validate the model output with satisfactory results. New findings on the mid-Holocene evolution of the PRD show that the delta’s chronological and spatial evolution pattern is different from those found in previous studies in several respects. The model confirms that complex morphologies, e.g., rocky islands in shallow estuarine bays, are some of the most important factors affecting the long-term evolution of the PRD.