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构造沉降是控制近代洞庭湖演变的关键因素吗?——评《洞庭湖地质环境系统分析》
李春初
中山大学地球与环境科学学院 广州510275
摘要:
本文对以研究近代洞庭湖演变趋势为主要内容的《洞庭湖地质环境系统分析》的系列研究成果进行评论,认为采用“假设-演绎法”研究洞庭湖演变得出的结论,依然建立在假设的基础上,并不可靠。文中还对该系列成果提出的“构造沉降是控制洞庭湖演变的关键因素”的论点和一些所谓的“构造沉降”表现及其计算数据提出质疑,认为近代洞庭湖的演变不是由内动力“构造沉降”控制,而是主要受入湖水沙条件变化、人工围垦湖滩和湖面—基面上升等外动力的作用和影响。
关键词:  近代洞庭湖演变  构造沉降  入湖水沙条件  湖滩围垦  湖水位上升
DOI：10.11693/hyhz200004019019
分类号:
基金项目:
TECTONIC SUBSIDENCE IN RELATION TO MODERN DONGTING LAKE EVOLUTION:REVIEW ON “DONGTING LAKE GEOLOGY ENVIRONMENTAL SYSTEM ANALYSIS”
LI Chun-chu
Faculty of Geo-Environmental Science,Zhongshan University,Guangzhou510275
Abstract:
This paper reviews the series research results of “Dongting Lake geology environmental system analysis” and argues that the conclusion of Dongting Lake evolution derived from “hypothesis-deduction method” is still based on hypothesis and unreliable. The paper also queries the argument of “Tectonic subsidence is the key factor controlling Dongting Lake evolution” and some important “tectonic subsidence” expression and their computed results preseted in the series results. the author belives that modern Dongting Lake evolution is not controlled by endogenetic force “Tectonic subsidence”, but by exogenetic forces such as changes in water and sediment input conditions, artifical polderization of lake beach and rise of lake level (datum level).
Key words:  Modern Dongting Lake evolution, Tectonic subsidence, Input-lake water and sediment condition, Polderization of lake beach, Rise of Lake Level
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