洞庭盆地东部地表垂直形变空间分布及原因分析

doi:10.11870/cjlyzyyhj2014Z1003

摘要/Abstract

摘要：

以洞庭盆地东部地区的南大膳、新河口、郭镇市、新墙、桃林寺5幅1955年和1983年1〖DK〗∶50 000地形图为数据源，运用地理信息系统（GIS）技术对数据进行矢量化、数字高程模型和形变模型构建，得到研究区地表垂直形变空间分布图，并结合研究区地表垂直形变分布图、洞庭盆地地质资料以及泥沙淤积资料，对研究区地表垂直形变的原因进行了分析。结果表明：(1)1955~1983年期间，南大膳新河口地区沉降区面积大于抬升区，在其沉降区，构造沉降起主导作用，促使地表沉降，而在其抬升区，泥沙淤积和人类活动起主导作用，促使地表抬升；(2)郭镇市新墙桃林寺地区抬升区面积远远大于沉降区，其沉降区基本沿水域分布，流水冲刷与人类活动起主导作用，促使地表沉降，而抬升区主要表现为一般抬升，主要受幕阜山隆起影响；(3)盆地中心中部地区（南大膳新河口）受构造沉降影响，以沉降为主，但局部地区在流水冲刷、泥沙淤积和人类活动影响下，或沉降加深，或地表抬升；盆地边缘地区（郭镇市新墙桃林寺）受到构造抬升影响，以抬升为主，但局部受流水冲刷、泥沙淤积和人类活动影响，或沉降，或抬升加强。因此，研究洞庭盆地地表垂直形变分布状况及原因，对掌握洞庭盆地演变趋势和洞庭盆地的工农业规划建设具有重要的理论意义

Abstract:

Based on the topographic maps of Nandashan,Xinhekou,Guozhenshi,Xinqiang and Taolinsi with a scale of 1:50 000 in 1955 and 1983, digital elevation models in these regions were setup by using Geographic Information System (GIS) tools to vector contour lines and terrain points.And then the spatial distribution maps of surface vertical deformation were produced by calculating digital elevation models in two periods.Combined with distribution maps of surface vertical deformation,geological data and sediment deposition data,reasons of surface vertical deformation were analyzed.The results were as follows.(1)The subsidence areas were larger than uplift areas in NandashanXinhekou region during 1955-1983.Subsidence areas were mainly affected by the tectonic subsidence,while uplift areas were mainly influenced by sedimentation and human activities in the region.(2) In GuozhenshiXinqiangTaolinsi region,uplift areas were much larger than subsidence areas.Subsidence areas were mainly distributed along waters resulted from flowing water and human activities,and uplift areas were mainly influenced by the uplift of Mufu Mountain in the region.(3) The center of the basin was influenced by tectonic subsidence such as NandashanXinhekou region,most areas gave priority to the subsidence,but local areas were affected by water,sediment deposition and human activities,so that some areas were in serious subsidence,and some areas were uplift.And the edge region of the basin were influenced by tectonic uplift such as GuozhenshiXinqiangTaolinsi region,so most areas gave priority to the uplift,but local areas were affected by the constant flow of water,sediment deposition and human activities,so that some areas were increasedly uplifted,and some areas were kept in the state of subsidence.Therefore，studying the spatial distribution and related reasons of surface vertical deformation in the east of Dongting Basin will play an important role in understanding the evolutionary tendency and planning and construction of industry and agriculture.

陈玉冬，李德平，高海丽，钟文章. 洞庭盆地东部地表垂直形变空间分布及原因分析[J]. 长江流域资源与环境, 2014, 23(s): 14-.

CHEN Yudong,LI Deping,GAO Haili,ZHONG Wenzhang. SPATIAL DISTRIBUTION AND REASON ANALYSIS OF THE SURFACE VERTICAL DEFORMATION IN THE EAST OF DONGTING BASIN[J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2014, 23(s): 14-.

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