河口红树林湿地沉积与地貌过程研究

项目名称： 河口红树林湿地沉积与地貌过程研究

项目编号： No.41306075

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 天文学、地球科学

项目作者： 刘涛

作者单位： 广西红树林研究中心

项目金额： 26万元

中文摘要： )：在热带-亚热带河口地区，广泛发育的红树林湿地可以在河口动力过程中截留大量沉积物，这种沉积作用有助于海平面上升背景下红树林湿地的延续，同时也对河口地貌演化产生显著影响。我国广西境内的南流江是一条典型的南亚热带中小型河流，河口区河道两侧原有的红树林湿地已经因人类破坏而消失，仅在河口潮坪上保存有大片自然红树林植物群落，作为河口演化对人类活动和全球变化响应的重要方面，河口红树林湿地系统的现代沉积和地貌过程值得我们深入研究。本项研究拟对南流江河口潮坪上的一个典型红树林湿地系统的沉积、动力和地貌特征展开综合研究，研究其沉积动力机制、沉积历史以及地貌演化过程，从而对当今热带-亚热带中小型河口演化有更深入的认识。

中文关键词： 红树林；沉积动力；地貌；气候；南流江

英文摘要： The mangroves wetland of tropic/subtropic estuary usually have a high efficiency of trapping sediment, which not only enable its accretion rate keep pace with the sea level rising ,but also can affect the estuary hydrodynamic process and morphology significently. As a typical subtropic river, Nanliujiang river depouch into Lianzhouwan Gulf in Guangxi province of China. In the past decads, the natural mangoves swamp belt along river channel in estuay have vanished due to humanbeing destroying (mainly is shrink pool digging ), and only the mangroves locating on the tidal flat can survive. the vanish of up-river mangroves welands also means more sediments can be catched in the mangoves swamp on tidal flat , therefore, the the sedimentation and morphology mechanism of these mangroves wetland is an important aspect of estuary feedback to humanbing activities in subtropic estuary, about which we still know little and need more studies. In this study, we will collect and analysize the information of sedimentary, morphology and hydrodynamic of a mangove wetland system on the tidal flat in Nanliujiang River estuary.the target is to know more about its sedimentation and morphology evolving mechanism. Thus we can understand the estuary elvoving trend under influncing of humanbeing activities more deeply.

英文关键词： mangrove；sedimentation dynamic；morphology；climate；Nanliu river