| 摘要: |
| 太湖流域位于长江三角洲地区，其排涝过程受长江口海平面变化及潮位变化的控制。本文采用一维河网非恒定流理论，建立了太湖流域河网水文模型，并对1991年太湖流域洪涝过程进行的模拟。在此基础上，假定当太湖流域发生1991年特大暴雨过程时，海平面上升0.5m和长江口发生了百年一遇高潮位，太湖最高水位可分别达到5.01m和4.99m，整个梅雨期排涝量分别比1991年少排14.9×108m3和13.1×108m3，加剧了该地区洪涝灾害的严峻程度。 |
| 关键词: 太湖流域 海平面变化 排涝 |
| DOI：10.11693/hyhz200006017017 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，49771075号 |
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| EFFECTS OF SEA LEVEL CHANGES TO WATERLOGGED DRAINAGE IN TAIHU BASIN |
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WANG La-chun,南京大学城市与资源学系 南京210093,南京大学城市与资源学系 南京210093,南京大学城市与资源学系 南京210093,南京大学城市与资源学系 南京210093
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State Pilot Laboratory of Coast & Island Exploitation, Nanjing University, Nanjing, 210093
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| Abstract: |
| The Taihu basin is located in the Changjiang River Delta area. Its waterlogged drainage process is influenced strongly by sea level changes and tide level changes near the Changjiang River estuary. Considering the river network in Taihu basin is complex, the river network is simplified in this paper. The authors analyze the drainage process at each drainage sluice and set up the river network hydrological model in Taihu basin with the unsteady flow computation method, and the waterlogging in 1991 is simulated. Based on this model, it is assumed that the sea level rise 0.5m or the tide level is associated with a frequency of occurrence of 1% in the Changjiang River estuary while the worst plum rains process in Taihu basin in 1991. The highest water level in Taihu is 5.01m and 4.99m, and the drainage water is reduced 14.9×108m3 and 13.1×108m3, respectively. It is aggravated the degree of flooding and waterlogging in Taihu basin. These must be considered by related agency. |
| Key words: Taihu basin, Sea level changes, Water logged drainage |
