近50年长三角地区水系时空变化及其驱动机制
Temporal and spatial change of stream structure in Yangtze River Delta and its driving forces during 1960s-2010s
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文摘
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基于1960s、1980s以及2010s三期1:5万地形图中水系数据,选取河网密度(Dd)、水面率(WSR)、干流面积长度比(R)、支流发育系数(K)和盒维数(D),探讨了长江三角洲地区水系近50年的时空格局及变化特征,并分析了城市化对水系结构的影响。结果表明:①近50年来,长三角水系河网密度、水面率数量特征呈下降趋势,其中武澄锡虞、杭嘉湖和鄞东南地区河网密度减少近20%;结构特征发生变化,秦淮河流域干流面积长度比增加显著,杭嘉湖地区支流发育系数衰减达46.8%;河网复杂度衰退,武澄锡虞和杭嘉湖地区的盒维数衰减分别达7.8%和6.5%。②城市化影响水系的空间分布,高度城市化地区河网密度、水面率、支流发育系数以及盒维数最低。③城市化深刻改变着水系的演化过程。1960s-2010s期间,高度城市化地区的河网密度、水面率衰减剧烈达27.2%和19.3%,河网主干化趋势加剧,河网复杂度下降4.91%。1980s-2010s期间,低度城市化地区支流衰减达53.3%,河网密度大幅下降14.6%。④城镇用地的扩张、水利工程的修建和农田水利活动是改变长三角水系的主要方式。 |
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其他语种文摘
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Spatial and temporal variations of river systems in the Yangtze River Delta (YRD) during the 1960s-2010s were investigated based on streams derived from the topographic map in the 1960s, 1980s and 2010s. A list of indices, drainage density (Dd), water surface ratio (WSR), the ratio of area to length of main river (R), evolution coefficient of branch river (K) and box dimension (D), were classified into three types (quantitative, structural, and complex indices) and used to quantify the variation of stream structure. Results showed that: (1) quantitative indices (Dd, WSR) presented a decreasing trend in the past 50 years, and Dd in Wuchengxiyu, Hangjiahu and Yindongnan decreased by about 20%. Structurally, the Qinhuai river basin was characterized by a significantly upward R, and K value in Hangjiahu went down dramatically by 46.8% during the 1960s- 2010s. A decreasing tendency in D was found to dominate the YRD, and decreasing magnitude in Wuchengxiyu and Hangjiahu peaked for 7.8%, and 6.5%, respectively in the YRD. (2) Urbanization affected the spatial pattern of river system, and areas with a high level of urbanization exhibited least Dd (2.18 km/km~2), WSR (6.52%), K (2.64) and D (1.42), compared with moderate and low levels of urbanization. (3) Urbanization also affected the evolution of stream system. In the past 50 years, areas with high level of urbanization showed a compelling decreasing tendency in quantitative (27.2% and 19.3%) and complex indices (4.9%) and trend of enlargement of main rivers (4.5% and 7.9% in periods of the 1960s- 1980s and 1980s-2010s). (4) Expanding of urban land, construction of hydraulic engineering and irrigation and water conservancy activities were the main means. |
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来源
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地理学报
,2015,70(5):819-827 【核心库】
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DOI
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10.11821/dlxb201505012
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关键词
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水系结构
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时空变化
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城市化
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长三角地区
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地址
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南京大学地理与海洋科学学院, 南京, 210023
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0375-5444 |
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学科
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自然地理学 |
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基金
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国家自然科学基金项目
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水利部公益性行业科研专项
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江苏省自然科学基金
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文献收藏号
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CSCD:5424485
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参考文献 共
25
共2页
|
|
1.
倪晋仁. 受损河流的生态修复.
科技导报,2006,24(7):17-20
|
被引
3
次
|
|
|
|
|
2.
李原园. 河湖水系连通研究的若干问题与挑战.
资源科学,2011,33(3):386-391
|
被引
50
次
|
|
|
|
|
3.
许有鹏.
长江三角洲地区城市化对流域水系与水文过程的影响,2012
|
被引
13
次
|
|
|
|
|
4.
Marsh G P.
Man and Nature, or Physical Geography as modified by Human Action,1865
|
被引
1
次
|
|
|
|
|
5.
Horton R E. Erosional development of streams and their drainage basins: Hydrophysical approach to quantitative morphology.
Geological Society of America Bulletin,1945,56(3):275-370
|
被引
206
次
|
|
|
|
|
6.
Strahler A N. Quantitative analysis of watershed geomorphology.
Eos, Transactions American Geophysical Union,1957,38(6):913-920
|
被引
128
次
|
|
|
|
|
7.
Gregory K J. Identification of river channel change to due to urbanization.
Applied Geography,1992,12(4):299-318
|
被引
12
次
|
|
|
|
|
8.
Hammer T R. Stream channel enlargement due to urbanization.
Water Resources Research,1972,8(6):1530-1540
|
被引
6
次
|
|
|
|
|
9.
Graf W L. Network characteristics in suburbanizing streams.
Water Resources Research,1977,13(2):459-463
|
被引
4
次
|
|
|
|
|
10.
Vanacker V. River channel response to short- term human- induced change in landscape connectivity in Andean ecosystems.
Geomorphology,2005,72(1):340-353
|
被引
9
次
|
|
|
|
|
11.
Elmore A J. Disappearing headwaters: Patterns of stream burial due to urbanization.
Frontiers in Ecology and the Environment,2008,6(6):308-312
|
被引
16
次
|
|
|
|
|
12.
Meyer J L. Lost linkages and lotic ecology: Rediscovering small streams.
Ecology: Achievement and challenge: The 41st Symposium of the British Ecological Society sponsored by the Ecological Society of America held at Orlando, Florida, USA, 10-13 April 2000,2001:295-317
|
被引
1
次
|
|
|
|
|
13.
Dunne T.
Water in Environmental Planning,1978
|
被引
10
次
|
|
|
|
|
14.
徐光来. 近50年杭—嘉—湖平原水系时空变化.
地理学报,2013,68(7):966-974
|
被引
11
次
|
|
|
|
|
15.
韩龙飞. 城市化对水系结构及其连通性的影响--以秦淮河中、下游为例.
湖泊科学,2013,25(3):335-341
|
被引
14
次
|
|
|
|
|
16.
袁雯. 城市化进程中平原河网地区河流结构特征及其分类方法探讨.
地理科学,2007,27(3):401-407
|
被引
34
次
|
|
|
|
|
17.
袁雯. 平原河网地区河流结构特征及其对调蓄能力的影响.
地理研究,2005,24(5):717-724
|
被引
40
次
|
|
|
|
|
18.
杨凯. 感潮河网地区水系结构特征及城市化响应.
地理学报,2004,59(4):557-564
|
被引
65
次
|
|
|
|
|
19.
陈德超. 上海城市化进程中的河网水系演化.
城市问题,2002(5):31-35
|
被引
11
次
|
|
|
|
|
20.
黄奕龙. 快速城市化地区水系结构变化特征——以深圳市为例.
地理研究,2008,27(5):1212-1220
|
被引
37
次
|
|
|
|
|
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