| 1949-2005兰州城区段黄河演变特征与影响因素分析 |
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| 引用本文： | 雒占福,白永平,蔡文春.1949-2005兰州城区段黄河演变特征与影响因素分析[J].干旱区地理,2009,32(3). |
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| 作者姓名： | 雒占福 白永平 蔡文春 |
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| 作者单位： | 1. 西北师范大学地理与环境科学学院,甘肃,兰州,730070
2. 兰州城市学院,甘肃,兰州,730070 |
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| 摘 要： | 通过兰州城区段1949、1975、1980、2000、2005年5个时期的黄河河道规模、河心滩规模、主河道河岸线长、平均河宽、河心滩密度以及城区人口规模、建设用地规模、河堤建设与滨河交通等信息资料,分析了1949年以来兰州城区段黄河的演变特征及其影响因素.结果表明:(1)解放后,兰州城区段黄河表现出快速而强烈的萎缩性演变特征,河流变窄,河心滩密度大幅下降,其萎缩过程呈现高速-缓慢-快速的波动性与游荡型-分汉型-弯曲型的空间形态变化.(2)兰州城区段黄河演变是城区人口规模与建设用地规模增长、带状防洪堤与滨河交通建设、城市规划与体制政策以及"蓄枯同期"时的黄河上游径流减小等因素综合作用的结果.
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| 关 键 词： | 黄河 演变特征 影响因素 兰州城区段 |
Characteristics of evolution and its impact factors of the Yellow River along the Lanzhou urban reach from 1949 to 2005 |
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| LUO Zhan-fu,BAI Yong-ping,CAI Wen-chun.Characteristics of evolution and its impact factors of the Yellow River along the Lanzhou urban reach from 1949 to 2005[J].Arid Land Geography,2009,32(3). |
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| Authors: | LUO Zhan-fu BAI Yong-ping CAI Wen-chun |
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| Institution: | LUO Zhan-fu~1,BAI Yong-ping~1,CAI Wen-chun~2 (1 College of Geography and Environment Sciences,Northwest Normal University,Lanzhou 730070,Gansu,China,2 Lanzhou Urban College,China) |
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| Abstract: | with the help of GIS technology,the channel information of the Yellow River in Lanzhou urban reach were taken from the actual land map in 1949,1975,1980,2000 and 2005.Fistly,the river evolution characteristics were analyzed according to the scale contraction intensity index,such as the channel scale,river islands scale, the main riverbank length,average river width,river islands density and river form index,and then the impact factors of river evolution were discussed in the light of urban population and ur... |
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| Keywords: | the Yellow River evolution characteristics impact factors the Lanzhou urban reach |
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