Sediment Deposition in the Middle Reaches of the Yangtze River and the Development of the Yangtze River Delta in the Holocene: A Discuss on Flood Control Strategies in the Middle Reaches of the Yangtze River
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摘要: 全新世海侵以来,巨量泥沙在长江河口湾一带堆积,形成了自西向东雁列的六个亚三角洲河口沙坝。长江口随之从镇江、扬州向东南方向推进到长兴岛一带,加之百余年来长江中游荆江河曲的演化和簰洲湾弯曲河道的发展,长江中下游河道累计延长620 km。长江中下游河床纵比降的自动调整,促使了中游一带河道泥沙淤积达12.9 m。长江河道的不断延伸加长和长江中下冲积河床对纵比降的自动调整,是长江中游河道淤涨和洪水位上升的内因;而荆江一带人类工程活动的参与,强化了长江泥沙向下游输移,加速了长江三角洲的发展和长江河道的延伸,构成了长江中游河道淤涨和洪水位上升的正反馈机制。长江中游防洪减灾策略、长江流域防洪规划和流域国土空间规划,应统筹考虑长江口浚海清淤和长江三角洲泥沙资源化利用,或开辟新的防洪入海通道,如开辟南通-如东入海新运河暨防洪新河。Abstract: Since the Holocene transgression, a huge amount of sediment has accumulated in the Yangtze estuary, forming six subdelta estuarine bars from west to east. The estuary of the Yangtze River has also advanced southeast from Zhenjiang and Yangzhou to Changxing island. Coupled with the evolution and development of the Jingjiang and Paizhou bay meanders in the middle reaches of the Yangtze River over the past hundred years, the riverway of middle and lower reaches of the Yangtze River have extended 620 km in total. The automatic adjustment of the longitudinal slope of the riverbed in the middle and lower reaches of the Yangtze River resulted in 12.9 meters of sediment deposition in the middle reaches of the river. The continuous extension and lengthening of the Yangtze River channel and the automatic adjustment of the longitudinal slope of the alluvial riverbed in the middle and lower reaches of the Yangtze River are the internal causes of the silting and flood level rise in the middle reaches of the Yangtze River. The participation of human activities in the Jingjiang River strengthened the sediment transport downstream of the Yangtze River, accelerated the development of the Yangtze River delta and the extension of the river channel, and constituted a positive feedback mechanism of channel silting and flood level rise in the middle reaches of the river. Flood prevention and disaster reduction strategies for the middle reaches of the Yangtze River, flood control planning and territorial spatial planning should consider the dredging and desilting of the Yangtze Estuary and the utilization of sediment resources in the Yangtze River Delt, or opening up new flood control channels into the sea, such as the Nantong - Rudong new canal into the sea and new river for flood control.
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[1] 曹光杰,王建.2005.长江三角洲全新世环境演变与人地关系研究综述[J].地球科学进展,20(7):757-764.
[2] 陈国金.1999.长江中游地区江湖综合整治环境地质研究[J].地球科学——中国地质大学学报,24(1):89-97.
[3] 陈国金.2008.江汉-洞庭湖平原区洪灾形成与防治的环境地质研究[J].防汛与抗旱,(15): 27-31.
[4] 陈立德.2018.长江中游荆江和江汉—洞庭地区防洪减灾策略[J].科技导报,36(15): 85-92.
[5] 董松年.1983.综合开发两沙运河有关问题的探讨[J].水运工程,(4):39-41.
[6] 方金琪.1991.冰后期海面上升对长江中下游影响的探讨[J].地理学报,46(4):425-435.
[7] 龚树毅,陈国金.1999.长江中游地区第四纪河湖演变及其对环境的影响[J].地球科学——中国地质大学学报,22(2):199-203.
[8] 官子和,蔡述明.1986.洞庭湖的形成与演变[J].泥沙研究,(1):70-73.
[9] 黄文典,王兆印.2007.长江中下游的河床纵剖面演变分析及预测[J].清华大学学报(自然科学版),47(12):2131-2134.
[10] 李绍虎.2006.中部崛起资源水利与生态水利并举[J].人民长江,37(11):68-70.
[11] 李长安,殷鸿福,陈德兴.1999.长江中游的防洪问题和对策—1998 年长江特大洪灾的启示[J].地球科学——中国地质大学学报,24(4):4-9.
[12] 林一山.1978.荆江河道的演变规律[J].人民长江,(3): 4-12.
[13] 刘盛佳.1996.开凿两沙、沙谌运河的初步探讨[J].华中师范大学学报(自然科学版),30(1):105-109.
[14] 钱正英.1998.对1998 年长江洪水的一些认识[J].中国水利,(12): 4-7.
[15] 石国钰,许全喜,陈泽方.2007.长江中下游河道冲淤与河床自动调整作用分析[J].山地学报,20(3):257-265.
[16] 谭其骧.1980.云梦与云梦泽[J].复旦学报(社会科学版),(S1):7-17.
[17] 童潜明.2004.荆江段泥沙淤积搬家与洞庭湖的防洪[J].国土资源科技管理,21(3): 20-26.
[18] 王靖泰,郭蓄民,许世远,李萍,李丛先.1981.全新世长江三角洲的发育[J].地质学报, 55(1):67-81.
[19] 杨达源.1986.晚更新世冰期最盛时长江中下游地区的古环境[J].地理学报,41(4):302-310.
[20] 杨怀仁,唐日常.1999.长江中游荆江变迁研究[M].北京:中国水利水电出版社.
[21] 杨文达.1996.全新世长江水下三角洲朵体及其发育特征[J].海洋地质与第四纪地质,16(3):25-36.
[22] 张曼,周建军,黄国鲜.2016.长江中游防洪问题与对策[J].水资源保护,32(4):1-10.
[23] 张修桂.1980.云梦泽的演变与下荆江河曲的形成[J].复旦学报(社会科学版),(2):44-52.
[24] 周凤琴.1986.荆江近5000 年来洪水位变迁的初步探讨[J].历史地理,(2):19-23.
[25] 周凤琴.1994.云梦泽与荆江三角洲的历史变迁[J].湖泊科学,6(1):22-32.
[26] 周宏伟.2012.云梦问题的新认识[J].历史研究,(2):6-28.
[27] 周建军,林秉南,张仁.2000.关于兴建江汉排洪通道缓解长江和汉江洪水的设想[J].水利学报,31(11):85-89.
[28] 左鹏.1999.论《导江三议》——兼论江汉洞庭地区人地关系的协调[J].长江志季刊,(3):56-60.
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