天津市及其沿海地区地表高程变化现状及趋势

基金项目: 中国地质调查局国土资源调查项目(批准号:19991300013051和200112400006)资助。

Present surface elevation change and trend in Tianjin and its coastal area.

Tianjin Center,China Geological Survey,Tianjin 300170,China,2. College of Earth Science,Jilin University,Changchun 130061,Jilin,China

摘要: 近百年来不同时期的地形图、有关资料的对比研究，揭示天津市及沿海地区的地表高程在20世纪近百年间已发生了明显变化。基于影响沿海地区地表形态的基本参数——保有高程、地面下沉、海面上升和垂直加积速率——所做的预测显示。2030年时天津及沿海地区的地表高程将继续损失，在相伴随的海面上升的共同作用下，预测沼泽化的影响范围将逼近天津市区。
- 天津市 /
- 地表高程 /
- 下沉 /
- 海面上升 /
- 趋势预测
Abstract: Comparative study of topographical maps and data produced in different periods in the last century illustrates that great changes in surface elevations have taken place in Tianjin and its coastal area in nearly one hundred years in the 20th century. Based on four essential parameters of the surface morphology influencing the coastal area-remaining elevation, ground subsidence, sea-level rise and vertical accretion rates, this study predicts that the surface elevation of Tianjin and its coastal lowland will continue to be reduced in 2030. With the concomitant influence of the attendant sea-level rise,envisaged paludification will press on towards the Tianjin metropolitan center in the coming years.
- Tianjin /
- surface elevation /
- subsiding /
- sea level rise /
- trend prediction