Temporal-spatial Variation of the Channel in Jiangsu Reach of the Yangtze River during the Last 44 Years
Received date: 2007-06-03
Revised date: 2007-07-25
Online published: 2007-11-25
Supported by
National Basic Research Program of China, No.2003CB415201-8
River channel sedimentation in the lower reaches of the Yangtze River can be affected by both rising sea level due to global warming and the construction of reservoirs in the upper river that reduces the amount of sand discharge. To evaluate the dynamic changes of sedimentation and erosion of the Jiangsu reach of the Yangtze River (about 330 km in length) from 1958 to 2003, databases of five periods Digital Elevation Mode (DEM) of underwater topography were designed and constructed on the basis of the Jiangsu River Relief Map in 1959, 1970, 1985, 1992 and 2003 (1:25000-1:60000). The result indicated that the main course of Yangtze River in Jiangsu Province had experienced an obvious switch from sedimentation to erosion around 1985 because of the decreasing amount of sediment yield from the upper Yangtze River after that year. The sedimentation process in the main course of Jiangsu reach of the Yangtze River demonstrated propulsive phenomena of "down-reach-ward accumulation". Between 1985 and 2003, the erosion rate of the lower segment was greater than those of the middle and upper segments. The reason is probably the bigger shortage of sediment yield due to the decrease of sediment source from the upper reach and the strengthening protection of the bank erosion in the lower reach.
Key words： Yangtze River; DEM; sedimentation; erosion; conversion; transition; channel; lower reach
WANG Jian, LIU Ping, GAO Zhengrong, BAI Shibiao, CAO Guangjie, QU Guixian . Temporal-spatial Variation of the Channel in Jiangsu Reach of the Yangtze River during the Last 44 Years[J]. Acta Geographica Sinica, 2007 , 62(11) : 1185 -1193 . DOI: 10.11821/xb200711007
[1] Huang Yue, Huang Yiling. Investigation into Tendency of River Erosion Downstream of Three-Gorge Project. Journal of Yangtze River Scientific Research Institute, 1998, 15(3): 6-10.
[黄悦, 黄翌龄. 三峡水库下游河床冲刷趋势探讨. 长江 科学院院报, 1998.15(3):6-10.]
[2] Dai Shibao, Yang Shilun, Zhao Huayun et al. Response of middle and lower reaches of Yangtze River to the initial operation stage of the Three Gorges Project. Journal of Sediment Research, 2005, (5): 35-39.
[戴仕宝, 杨世伦, 赵华云 等. 三峡水库蓄水运用初期长江中下游河道冲淤响应. 泥沙研究, 2005, (5): 35-39.]
[3] Li Yitian, Sun Zhaohua, Deng Jinyun. A study on riverbed erosion downstream from the Three Gorges Reservoir. Journal of Basic Science and Engineering, 2003, 11(3): 283-295.
[李义天, 孙昭华, 邓金运. 论三峡水库下游的河床冲 淤变化. 应用基础与工程科学学报, 2003, 11(3): 283-295.]
[4] Han Qiwei, He Mingmin. Erosion of river reach downstream Three Gorge Reservoir and its influence on flood prevention. Journal of Hydroelectric Engineering, 1995, (3): 34-46.
[韩其为, 何明民. 三峡水库修建后下游长江冲刷及 其对防洪的影响. 水利发电学报, 1995, (3): 34-46.]
[5] Yu Minghui, Liang Xing, Duan Xuezhong. Peak water level variation and bed change of the Yangtze River. South-to-North Water Transfers and Water Scinece & Technology, 2004, 2(6): 31-35.
[余明辉, 梁杏, 段学忠. 长江中下 游洪水变化与河床冲淤. 南水北调与水利科技, 2004, 2(6): 31-35.]
[6] Shi Guoyu, Xu Quanxi, Chen Zefang. Analysis on channel scouring and silting and self-adjusting in midstream and downstream reaches of Changjiang River. Journal of Mountain Science, 2002, 20(3): 257-265.
[石国钰, 许全喜, 陈泽 方.长江中下游河道冲淤与河床自动调整作用分析. 山地学报, 2002, 20(3): 257-265.]
[7] Duan Xuezhong, Zhang Zhengquan. The river morphology change of Jingjiang Reach after the operation of the Three Gorges Reservoir. Journal of Wuhan University of Hydraulic and Electric Engineering, 1997, 30(4): 26-29.
[段学忠, 张 政权. 三峡建库后荆江河段河床形态变化. 武汉水利电力大学学报, 1997, 30(4): 26-29.]
[8] Jiang Jiahu, Huang Qun. Impacts of the Three Gorges Project on its downstream water level. Journal of Hydraulic Engineering, 1997, (8): 39-43.
[姜加虎, 黄群. 三峡工程对其下游长江水位影响的研究. 水利学报, 1997, (8): 39-43.]
[9] Yin Hongfu, Chen Guojin. Analysis of sediment in the middle reach of the Yangtze River. Science in China (Series D) 2004, 34(3): 195-209.
[殷鸿福, 陈国金. 长江中游的泥沙淤积问题.中国科学(D 辑), 2004, 34(3): 195-209.]
[10] Li Congxian, Yang Shouye, Fan Daidu. The change in Changjiang suspended load and its impact on the delta after completion of Three Gorges Dam. Quaternary Sciences, 2004, 24(5): 495-500.
[李从先, 杨守业, 范代读. 三峡大坝建 成后长江输沙量的减少及其对长江三角洲的影响. 第四纪研究, 2004, 24(5): 495-500.]
[11] Yang S L, Belkin I M. Delta response to decline in sediment supply from the Yangtze River: Evidence of the recent four decades and expectations for the next half century. Estuarine, Coastal & Shelf Science, 2003, 57: 689-699.
[12] Yang Shilun, Zhu Jun, Li Peng. Response of tidal bank on the Changjiang River Mouth foreland to drastic decline in riverine sediment supply and sea level rise. Advances in Marine Science, 2005, 23(2): 152-158.
[杨世伦, 朱俊, 李鹏. 长江口前沿潮滩对来沙锐减和海面上升的响应. 海洋科学进展, 2005, 23(2): 152-158.]
[13] Yu Zhiying, Lou Fei. The evolvement characteristics of Nanhuizui foreland in the Changjiang Estuary, China. Acta Oceanologica Sinica, 2004, 26(3): 47-53.
[虞志英, 楼飞. 长江口南汇嘴近岸海床近期演变分析: 兼论长江流域来沙 量变化的影响. 海洋学报, 2004, 26(3): 47-53.]
[14] Li Ming, Yang Shilun, Li Peng et al. Drastic decrease in sediment supply from Yangtze River and coastal crisis. Acta Geographica Sinica, 2006, 61(3): 282-288.
[李明, 杨世伦, 李鹏等. 长江泥沙锐减与海岸滩涂资源的危机. 地理学 报, 2006, 61(3): 282-288.]
[15] Li Maotian, Chen Zhongyuan. Analysis of Jiujiang reach of Changjiang River evolution in recent forty years using DEM. Advances in Water Science, 2004, 15(3): 330-335.
[李茂田, 陈中原. 长江九江段40 年来河道演变的DEM 研 究. 水科学进展, 2004, 15(3): 330-335.]
[16] Xu Jiongxin. Respond of channel sediment budget to flow and sediment inputs: An example of the Yichang-Wuhan reach, Yangtze River. Acta Geographica Sinica, 2005, 60(2): 337-348.
[许炯心. 长江宜昌—武汉河段泥沙年冲淤量 对水沙变化的响应. 地理学报, 2005, 60(2): 337-348.]
[17] Du Yonghong, Guo Bixiang, Chen Desheng. Variation of the Rugao sandy beach in Yangtze River . Yangtze River, 2002, 33(12): 11-13.
[杜永红, 郭必祥, 陈德胜. 长江如皋沙群演变与整治. 人民长江, 2002, 33(12): 11-13.]
[18] Mao Ye, Huang Cai'an, Chen Jianhua. Experimental study on the effects of sand mining on the riverbed deformation in Zhenjiang reach and its application. Journal of Sediment Research, 2004, (3): 41-45.
[毛野, 黄才安, 陈建华. 长江镇 江段河道采沙的影响及其控制利用试验研究. 泥沙研究, 2004, (3): 41-45.]
[19] Liu Juan, Liu Hong, Sun Daifeng. Analesis on evolution tendency of river bed for Zheng-Yang stretch in rencent period. Journal of Yangtze River Scientific Research Institute, 2003, 20(4): 18-20.
[刘娟, 刘宏, 张岱峰. 长江镇扬河 段近期河床演变趋势分析. 长江科学院院报, 2003, 20(4): 18-20.]
[20] Zhang Zengfa, Li Qishun. Study on river bed evolution of Zhenjiang-Yangzhou reach, Yangtze River. Yangtze River, 2001, 32(9): 39-40.
[张增发, 李启顺. GIS 支持下长江镇扬河段河床演变分析. 人民长江, 2001, 32(9): 39-40.]
[21] Ding Xianrong, Wang Wen, Yang Tao. River digital terrain information system and GIS for Zhen-Yang Section of Yangtze River. Journal of Hohai University (Natural Sciences), 2001, 29(4): 116-119.
[丁贤荣, 王文, 杨涛.长江河道 数字地形信息系统和镇扬河段GIS 研制. 河海大学学报, 2001, 29(4): 116-119.]
[22] Song Lanlan. Research on the location of tidal current limit of Yangtze River. Hydrology, 2002, 22(5): 25-26.
[宋兰兰. 长江潮流界位置探讨. 水文, 2002, 22(5): 25-26.]
[23] Xu Gang, Wang Ying, Zhu Dakui. Sea level rise analysis of the Yangtze River Estuary. Journal of Nanjing University (Natural Sciences), 1998, 34(3): 272-276.
[徐刚, 王颖, 朱大奎. 长江口海面上升量分析. 南京大学学报(自然科学 版), 1998, 34(3): 272-276.]
[24] Ying Ming, Li Jiufa, Wan Xinning et al. Study on time series of sediment discharge at Datong Station in the Yangtze River. Resources and Environment in the Yangtze Basin, 2005, 14(1): 83-87.
[应铭, 李九发, 万新宁等. 长江大通站 输沙量时间序列分析研究. 长江流域与环境, 2005, 14(1): 83-87.]
/
| 〈 |
|
〉 |