| 长江大通-河口段枯季的径流量变化 |
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| 引用本文： | 张二凤,陈西庆,王晓丽.长江大通-河口段枯季的径流量变化[J].地理学报(英文版),2003,13(3):355-362. |
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| 作者姓名： | 张二凤 陈西庆 王晓丽 |
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| 作者单位： | StateKeyLaboratoryofEstuarineandCoastalResearch,EastChinaNormalUniversity,Shanghai200062,China |
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| 基金项目： | National Natural Science Foundation of China No. 49971071，Shanghai Priority Academic Discipline |
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| 摘 要： | Based on hydrometric data and extensive investigations on water-extracting projects, this paper presents a preliminary study on water discharge changes between Datong and Xuliujing during dry season. The natural hydrological processes and human factors that influence the water discharge are analyzed with the help of GIS method. The investigations indicate that the water-extracting projects downstream from Datong to Xuliujing had amounted to 64 in number by the end of 2000,with a water-extracting capacity up to 4,626 m3/s averaged in a tidal cycle. The water extraction from the Changjiang River has become the most important factor influencing the water discharge downstream Datong during dry season. The potential magnitude in water discharge changes are estimated based on historical records of water extraction and a water balance model. The computational results were calibrated with the actual data. The future trend in changes of water discharge into the sea during dry season was discussed by taking into consideration of newly built hydro-engineering projects. The water extraction downstream Datong in dry season before 2000 had a great influence on discharges into the sea in the extremely dry year like 1978-1979. It produced a net decrease of more than 490 m^3/s in monthly mean discharges from the Changjiang into the sea. It is expected that the water extraction will continually increase in the coming decades, especially in dry years, when the net decrease in monthly mean water discharge will increase to more than 1000 m^3/s and will give a far-reaching effect on the changes of water discharge from the Changjiang into the sea.
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| 关 键 词： | 长江 枯季 径流分析 水文分析 人为因素 |
| 收稿时间： | 20 January 2003 |
| 修稿时间： | 15 May 2003 |
Water discharge changes of the Changjiang River downstream Datong during dry season |
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| Zhang?Erfeng,Chen?Xiqing,Wang?Xiaoli.Water discharge changes of the Changjiang River downstream Datong during dry season[J].Journal of Geographical Sciences,2003,13(3):355-362. |
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| Authors: | Zhang Erfeng Chen Xiqing Wang Xiaoli |
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| Institution: | State Key Laboratory of Estuarine and Coastal Research, East China Normal University,Shanghai 200062, China |
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| Abstract: | Based on hydrometric data and extensive investigations on water-extracting projects, this paper presents a preliminary study on water discharge changes between Datong and Xuliujing during dry season. The natural hydrological processes and human factors that influence the water discharge are analyzed with the help of GIS method. The investigations indicate that the water-extracting projects downstream from Datong to Xuliujing had amounted to 64 in number by the end of 2000, with a water-extracting capacity up to 4,626 m 3 /s averaged in a tidal cycle. The water extraction from the Changjiang River has become the most important factor influencing the water discharge downstream Datong during dry season. The potential magnitude in water discharge changes are estimated based on historical records of water extraction and a water balance model. The computational results were calibrated with the actual data. The future trend in changes of water discharge into the sea during dry season was discussed by taking into consideration of newly built hydro-engineering projects. The water extraction downstream Datong in dry season before 2000 had a great influence on discharges into the sea in the extremely dry year like 1978-1979. It produced a net decrease of more than 490 m 3 /s in monthly mean discharges from the Changjiang into the sea. It is expected that the water extraction will continually increase in the coming decades, especially in dry years, when the net decrease in monthly mean water discharge will increase to more than 1000 m 3 /s and will give a far-reaching effect on the changes of water discharge from the Changjiang into the sea. |
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| Keywords: | the Changjiang River dry season water discharge into the sea human impacts |
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