| 摘要: |
| 于1988 - 1991年，对长江三角洲附近沿海潮滩和湿地进行较全面的调查，利用高程-面积法、沉积速率法，井引进未来冲淤趋势参数，对全区14个典型潮滩断面进行海平面上升影响的估算。结果表明，当海平面上升0.5m和1.0m时，全区潮滩面积分别比1990年的减少9.2％和16.7％；湿地面积减少20％和28％，并发生高级类型向低级类型的逆向演替。各岸段损失率相差悬殊，以侵岸段较大，淤涨岸段将减缓淤涨，甚至转为侵蚀。 |
| 关键词: 潮滩 湿地 海平面上升 长江三角洲 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金重大项目，948807号;中国科学院重大项目，87－45－03号 |
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| IMPACTS OF SEA LEVEL RISE ON TIDAL FLAT AND COASTAL WETLAND IN THE CHANGJIANG RIVER DELTA AND ITS ADJACENT AREA |
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Ji Zixiu, Jiang Zixun, Zhu Jiwen, Yang Guishan
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Nanjing Institute of Geography and Limnology, Academia Sinica, Nanjing 210008
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| Abstract: |
| A comprehensive investigation on the tidal flat and coastal wetland in the Changjiang River Delta and its adjacent area was conducted from 1988 - 1991 for studying the impact of sea level rise. The elevation-area, sedimentation rate and parameter estimate of future scourage-siltation tendency are used to calculate the impacts of sea level rise in 14 typical cross sections of the tidal flat. The result shows that if sea level rises by 50 and 100 cm, the area of tidal flat will decrease by 9.2% and 16.7% respectively of that in 1990 and the areas of coastal wetland decrease by 20% and 28% respectively. At the same time, wetlands will also retrogress from advanced forms to original ones. Judged by the whole area, the damage .rates vary in the different coastal section, and are high in the erosion coasts and low in the accretion coasts. Sea level rise will result in reduction in sedimentation rate or even turn accretion into erosion. |
| Key words: Tidal flat, Wetland, Sea level rise, Changjiang River Delta |
