CAJ | 학술논문

长江口深水航道工程改变了长江口自然环境，导致周边水下地貌形态发生明显的变化。本文选取长江口九段沙周边浅滩区域作为研究区，搜集不同年份的海图资料，利用GIS技术进行地貌演变空间分析。分析发现：自2001年一期工程完工以来，九段沙周边浅滩总体处于稳定状态，冲淤空间分布特征明显；沿着南导堤堤坝泥沙淤积明显，导致南导堤北侧丁坝内形成淤积带，九段沙尾部沿着堤坝形成淤积带；江亚南沙下沙阻挡作用，使得上游来水在沙头处分流，在两股水流的作用下，九段沙西南侧分别形成两条平行的淤积带和冲刷带。
장강구심수항도공정개변료장강구자연배경，도치주변수하지모형태발생명현적변화。본문선취장강구구단사주변천탄구역작위연구구，수집불동년빈적해도자료，이용GIS기술진행지모연변공간분석。분석발현：자2001년일기공정완공이래，구단사주변천탄총체처우은정상태，충어공간분포특정명현；연착남도제제패니사어적명현，도치남도제북측정패내형성어적대，구단사미부연착제패형성어적대；강아남사하사조당작용，사득상유래수재사두처분류，재량고수류적작용하，구단사서남측분별형성량조평행적어적대화충쇄대。
The Yangtze Estuary Deep -water Channel Project has changed the natural environment of the Yangtze Delta , leading to the obvious change of the surrounding underwater topography .This article selected the shallow areas near The Yangtze estuary Jiudu-ansha as the study areas .It collected the chart data in different years , and used the GIS technology for spatial analysis of the geomor-phologic evolution .We can conclude from the analysis that since the completion of the deepwater channel project in 2001 , the Jiudu-ansha shallows are overall in a steady state .The sediment accumulation is obvious along the south dike dam , forming the Deposit belt in the north side of the south dike Groyne and the deposit belt along the dam at the end of Jiuduansha .The water from upstream dis-tributes at the head of sediment under the blocking of River of Nansha .Under the effect of two flows , the southwest side of Jiuduansha has respectively formed two parallel deposit belt and wash zone .