长江口崇明东滩潮沟地貌形态和演变

刘建华; 杨世伦; 史本伟; 罗向欣; 付信坤

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海洋学研究 ›› 2012, Vol. 30 ›› Issue (2) : 43-50.

研究论文

长江口崇明东滩潮沟地貌形态和演变

刘建华¹, 杨世伦^1,*, 史本伟¹, 罗向欣¹, 付信坤²

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lopography and evolution of the tidal trench in the eastern Chongming tidal flat, Changjiang River Estuary

LIUJian-hua¹, YANG Shi-lun^1,*, SHI Ben-wei¹, LUO Xiang-xin¹, FU Xin-kun²

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文章历史 +

摘要

利用1994,2000和2009年的崇明东滩TM和ETM遥感图像和GIS技术确定潮沟的平面形态、量算了潮沟的长度和密度|在野外,利用RTK-GPS进行了典型潮沟的地形测量以确定潮沟的发育高程、宽度﹑深度、宽深比以及断面面积的纵向变化,并利用GIS技术建立了该潮沟的三维地貌模型。研究结果表明:(1)崇明东滩的潮沟主要发育在潮间带上部的盐沼中,北部和中部以单-微弯型潮沟为主,南部以树枝状潮沟为主。(2)1994年潮沟总长度为30.9 km,密度为717 m/km³;因1998年的盐沼中上部围垦,2000年潮沟总长度和密度分别减少为11.1km和 459 m/km²;近 10 a,因盐沼向海淤涨扩大,至2009年,潮沟总长度和密度又分别增大到31.8 km和 981 m/km²;3个时期的潮沟兴衰演变反映了自然作用和人类活动的共同影响。(3)与欧美典型潮间带潮沟侧向移动为主的演变特点不同,崇明东滩的潮沟以继承性的纵向延伸(随着盐沼的向海淤涨)为主。(4)从沟口溯源而上,潮沟的宽深比有明显的减小趋势(从大于340减小为小于18),潮沟的深度有先增大而后减小的趋势。本研究实例表明:与传统手段相比,3S技术是进行大空间尺度和长时间尺度潮间带湿地潮沟形态和演变定量研究的更有效方法。

Abstract

Tidal trenchs are important channel for material transport and water energy exchange in theintertidal zone. In this study,TM and ETM remote sensing (RS) images of 1994,2000 and 2009 and GIStechnology were used to define the plane morphology and calculate the length and density of the tidaltrenches;RTK-GPS was used to make in situ measurements of topography for determining a typical tidaltrench development hight,width,depth,width-depth ratio and longitudinal variation of the cross-sectionarea; and GIS was used to establish the DEM model of the trench.The results show that (l) in the easternChongming tidal flat, tidal trenches are developed mainly in the salt marsh,and the northern and middle partsof the tidal flat are dominated by single and slightly curved ones,whereas the southern part by dendritic ones;(2) the total length and density of the tidal trenches in 1994 were 30.9 km and 717 m/km² respectively,theydecreased to ll.l km and 459 m/km² in 2000 because of reclamation of the upper salt marsh and increased to31.8 km and 98l m/km³ in 2009 due to seaward silting of the salt marsh,which reflect the impacts of naturalaction and human activities on the flat;(3) not like the typical evolutionary feature of lateral movement inEurope and America,the evolution of the tidal trenches in the eastern Chongming tidal flat is mainlycharacterized by successive longitudinal extension (with the sea ward silting of the salt marsh); (4) from themouth of the tidal trenches upward,the ratio of width to depth decreased from >340 to≤<18,and the depthfirst increased and then decreased. This study shows that 3S technology has advantages over traditionalmethods in quantitative study of large spatial and temporal scale evolution of tidal trenches.

导出引用

刘建华, 杨世伦, 史本伟, 罗向欣, 付信坤. 长江口崇明东滩潮沟地貌形态和演变[J]. 海洋学研究. 2012, 30(2): 43-50

LIUJian-hua, YANG Shi-lun, SHI Ben-wei, LUO Xiang-xin, FU Xin-kun. lopography and evolution of the tidal trench in the eastern Chongming tidal flat, Changjiang River Estuary[J]. Journal of Marine Sciences. 2012, 30(2): 43-50

中图分类号： P737.1

参考文献

[1] SHI Zhong,PYEK,CHEN Ji-yu. Progress in physical processes on mudflat saltmarsh: Anoverview[J]. Advances in Earth Science’1995,10(1):19-30.
时钟,PYE K,陈吉余.潮滩盐沼物理过程的研究进展综述[J].地球科学进展, 995,0(1):9-30.
[2] ZHANG Ren-shun. Muddy tidal flat equilibrium Case study within the margin radiation sandbank of Jiangsu provin.ce[J]. Chi-na Science Bulletin, 1995,40 (4): 347-350.
张忍顺.淤泥质潮滩均衡态--以江苏辐射沙洲内缘区为例[J].科学通报, 995,40(4):347-350.
[3] REINECK H E, SING H. Depositional sedimentary environments [M]. 2ed edition. Berlin: Springer-Verlag,980.
[4] WANG Ya-ping,ZHANG Ren-shun,GAO Shu. Velocity varia-tions in satt marsh creeks,Jiangsu,China [J]. Journal of Coastal Research,999,15(2):471-477.
[5] ALLEN JR L. Morphdynamics of Holocene satt marshes: a re-view sketch from the Atlantic and Southern North Sea coasts of Europe[J]. Quaternary Science Reviews, 2000, 19: 1 155-1 231.
[6] BOGGS S Jr. Principle of sedimentology and stratigraphy[M]. 3rd edition. New Jersey: Prentice Hall,2001.
[7] POSTMA H. Transport an accumulation of suspended matter in the Dutch Wadden Sea Netherlands [J]. Sea Research,1961,1(2), 148-179.
[8] BRIDGES P H,LEEDER M R. Sedimentary modll for inter-tidal mudflat channels,with examples from the Sloway Firth,Scotland [J]. Sedimentology,1976,23(4):533-552.
[9] PETHICK J S. Saltmarshes-morphodynamics, conversation and engineering significe[C]//ALLEN J R L, PYE K. Salt-marsh ge-omorphology [M]. London: Cambridge University Press, 1992: 141-621)
[10] ALLEN J R L. Simulation models of salt-marsh morphodynamics: Some implications for high-in.tertidal sediment couplets relat-ed to sea-level change[J]. Sedimentary Geology, 1997,113 (3/4), 211-223.
[11] BASS A S,TURNER R E. Relationships between salt-marsh loss and dredged canals in three Louisiana estuaries[J]. Journal of Coastal Research,1997,13(3):895-903.
[12] CHRISTIANSEN T,WIBERG P L,MILLIGAN T G. Flow and sediment transport on a tidal satt marsh surface[J]. Estuar-ine Coastal and Sheff Science,2000,0(3): 315-331.
[13] FAN D D, LIC X,WANG D J,et al. Morphology and sedimen-tation on open-coast intertidal flats of the Changjiang Delta, China[J]. Journal of Coastal Research,2004,SI(43): 23-35.
[14] ZHANG Ren-shun, WANG Xue-yu. Tidal creek system on. tidal mud flat of Jiangsu province.]. Acta Geographica Sinica, 1991, 46(2):195-206.
张忍顺,王雪瑜.江苏淤泥质海岸潮沟系统[J].地理学报, 991, 46(2):195-206.
[15] CHEN Cti-jun. Change in tide creek after mudflat being enclosed in the middle coast in Jiangsu Provin.ce[J]. Marine Science Bulletin, 001, (6):71-79.
陈才俊.江苏中部海堤大规模外迁后的潮水沟发育[J].海洋通报, 001, 0(6):71-79.
[16] WANG Ya-ping, ZHANG Ren-shun, GAOShu. The morpholo-gy dynamic response of the satt marsh-tidal creek system[J]. China Science Bulletin, 998, 3(21):2 315-2 320.
汪亚平,张忍顺,高抒.论盐沼-潮沟系统的地貌动力响应[J].科学通报, 998,43(21):2 315-2 320.
[17] YIN Yan-hong,CHENG Guo-dong,FAN Shun-ting,et al. Morphology and hydrodynamics of the tidal channel near well 101, Zhuangxi, Yellow River delta [J]. Marine Sciences, 1997 "):46-48.
尹延鸿,成国栋,范顺庭,等.黄河三角洲粧西101站潮沟地貌形态及其水动力学研究[J].海洋科学, 997: 46-48.
[18] XU Zhi-ming. The eastern flat sedimentation of the Chongming Island[J]. Oceanologia et Limnologia Sincia, 1985,16 (3): 231-239.
徐志明.崇明岛东部潮滩沉积[J].海洋与湖沼, 985,16(3):231239.
[19] SUN Xiao-gong, ZHAO Hai-hong, CUI Cheng-qi. The fractal characteristics of tidal flat and tidal creek system in the Huanghe River delta[J]. Oceanologia et Limnologia Sincia, 2001,32 (1):74-80.
孙效功,赵海虹,崔承琪.黄河三角洲潮滩潮沟体系的分维特征 [J].海洋与湖沼, 001, 2(1):74-80.
[20] XIE Dong-feng, FAN Dai-du, GAO Shu. Flat of Chongming Is-land and its impacts on the sediment distribution.[J]. Marine Ge-ology q QuaternaryGeology, 006,26(2): 9-16.
谢东风,范代读,高抒.崇明岛东滩潮沟体系及其沉积动力学 [J].海洋地质与第四纪地质, 006,26(2): 9-16.
[21] YANG Shi-lun, YAO Yan-ming, HE Song-lin. Coastal profile shape and erosion-accretion changes of the sediment islands in the Changjiang River estuary[J]. Oceanologia et Limnologia Sincia,1999,30(6):764-769.
杨世伦,姚炎明,贺松林.长江口冲积岛岸滩剖面形态和冲淤规律[J].海洋与湖沼, 999,30(6):764-769.
[22] YANGShi-lun, DINGPing-xing, CHENShen-liang. Changes in progradation rate of the tidal flats at the mouth of the Changjiang River, China[J]. Geomorphology, 2001, 38； 167-180.
[23] YANG Shi-lun, MILLIMANJD, LI Peng, et al 50, 00 dams later: Erosion of the Yangtze River and its delta[J]. Global and Planetary Change, 2011,75(1/2): 14-20.
[24] YANGShi-lun, LI H, YSEBAERTT, et al. Spatial and tempo-ral variations in sediment grain size in tidal wetlands, Yangtze delta: On the role of physical and biotic con.trols[J]. Estuarine, Coastal and Shelf Science, 008,77: 657-671.
[25] YANG Shi-lun, DING Ping-xing, ZHU Jun, et al Tidal flat morphodynamic processes of the Yangtze Estuary and their engi-neering implications[J]. China Ocean Engineering, 2000, 14(3): 307-320.
[26] LI Zhan-hri, CHEN Shen-liang, ZHANG Guo-an. The study on grain-size distribution of suspended sediment and resuspension process on the Chongming east intertidal and subtidal zones in the Changjiang Estuary in China [J]. Acta Oceanologica Sinica, 2008, 0(6):154-163.
李占海,陈沈良,张国安.长江口崇明东滩水域悬沙粒径组成和再悬浮作用特征[J].海洋学报, 08,30(6):154-163.
[27] WU Lun,LIU Yu,ZHANG Jing, et al. GIS theory,methods and applications[M]. Beijing: Science Press, 001: 180-183.
邬伦,刘瑜,张晶,等.地理信息系统原理、方法和应用[M].北京: 科学出版社, 001:180-183.
[28] LIU Xiang-nan, HUANG Fang, WANG Ping, et al. GIS spatial analysis principles and methods [M]. Beijing: Science Press, 2005:209-211.
刘湘南,黄方,王平,等.GIS空间分析原理和方法[M].北京:科学出版社, 005:209-211.
[29] SHEN Yong-ming, ZHANG Ren-shun, WANG Yan-hong. The tidal creek character in salt marsh of Spartina alterniflora Loisel on strong tide coast[J]. Geographical Research, 2003, 22 (4)520-527.
沈永明,张忍顺,王艳红.互花米草盐沼潮沟地貌特征[J].地理研究, 003,22(4):520-527.
[30] ROBERTS W, LE HIR P, WHITEHOUSE R JS. Investiga-tions using simple mathematical models of the effett of tidal cur-rents and waves on the profile shape of intertidal mudflats[J]. Continental Shelf Research, 2000,20；1 079-1 097.
[31] YANG Shi-lun, FRIEDRICHS C T, DING Ping-xing, et al Morphological response of tidal marshes, flats and channels of the outer Yangtze River mouth to a major storm[J]. Estuaries, 2003,26(6):1 416-1 425.
[32] YANG Shi-lun. The role of Scirpus marsh in attenuation of hy-drodynamics and retention of fine sediment in the Yangtze Estuary[J]. Estuarine, Coastal and Shelf Science,1998, 7:227-233.
[33] JI Xiao-qiang, HE Qing, LIU Hong, et al Preliminary study on hydrodynamics and sediment processes in Chongming Dongtan [J]. Journal of Sediment Research, 2010,2(1);46-57.
吉晓强,何青,刘红,等.崇明东滩水文泥沙过程分析[J].泥沙研究, 010,2(1):46-57.
[34] REINECK H E, SINGH I B. Depositional sedimentary environ-ments with reference to terrigenous clastics[M]. Berlin: Spring-er-Verlag, 973.
[35] YANG Shi-lun, LI Ming, DAI Shi-bao, et al Drastic decrease in sediment supply from the Yangtze River and its challenge to coastal wetland management[J]. Geophysical Research Letters, 2006,33:1-4.