应用海洋学学报
應用海洋學學報
응용해양학학보
Journal of Applied Oceanography
2014年
4期
574-580
,共7页
陈洪全%彭俊%陈沈良%刘付程
陳洪全%彭俊%陳瀋良%劉付程
진홍전%팽준%진침량%류부정
海洋地质学%废黄河三角洲%沉积物%空间变异性%地统计学%苏北
海洋地質學%廢黃河三角洲%沉積物%空間變異性%地統計學%囌北
해양지질학%폐황하삼각주%침적물%공간변이성%지통계학%소북
marine geology%the abandon Yellow River Delta%sediment%spatial variability%geostatistics%north of Jiangsu Province
在苏北废黄河三角洲海域采集了266个表层沉积物样品,经粒度分析获得各样品粘土、粉砂和砂3种粒级组分的质量百分数,在此基础上运用地统计学方法和GI S软件分析了粘土、粉砂和砂3种粒级组分的空间变异特征,根据空间变异特征研究结果,用Kriging插值方法绘制了各粒级组分的空间分布图.结果表明:废黄河三角洲表层沉积物中砂组分具有较强的空间自相关性,其自相关距离为30.5 km;粘土和粉砂具有中等的空间自相关性,其自相关距离分别为40.3 km和13.8 km.在大于17.0 km 的尺度上,3种粒级组分的空间变异性表现出明显的各向异性特征,且以NE55°和SE145°两组相互垂直的方向上差异最为明显,这是由于波浪、潮流等因素作用所引起的沉积物离岸梯度变化造成的.制图结果显示,废黄河三角洲表层沉积物3种粒级组分的空间分布状况,粘土表现为近岸低、远岸高;砂表现为近岸高、远岸低,高值区主要在河口附近;粉砂表现为均匀性特征.
在囌北廢黃河三角洲海域採集瞭266箇錶層沉積物樣品,經粒度分析穫得各樣品粘土、粉砂和砂3種粒級組分的質量百分數,在此基礎上運用地統計學方法和GI S軟件分析瞭粘土、粉砂和砂3種粒級組分的空間變異特徵,根據空間變異特徵研究結果,用Kriging插值方法繪製瞭各粒級組分的空間分佈圖.結果錶明:廢黃河三角洲錶層沉積物中砂組分具有較彊的空間自相關性,其自相關距離為30.5 km;粘土和粉砂具有中等的空間自相關性,其自相關距離分彆為40.3 km和13.8 km.在大于17.0 km 的呎度上,3種粒級組分的空間變異性錶現齣明顯的各嚮異性特徵,且以NE55°和SE145°兩組相互垂直的方嚮上差異最為明顯,這是由于波浪、潮流等因素作用所引起的沉積物離岸梯度變化造成的.製圖結果顯示,廢黃河三角洲錶層沉積物3種粒級組分的空間分佈狀況,粘土錶現為近岸低、遠岸高;砂錶現為近岸高、遠岸低,高值區主要在河口附近;粉砂錶現為均勻性特徵.
재소북폐황하삼각주해역채집료266개표층침적물양품,경립도분석획득각양품점토、분사화사3충립급조분적질량백분수,재차기출상운용지통계학방법화GI S연건분석료점토、분사화사3충립급조분적공간변이특정,근거공간변이특정연구결과,용Kriging삽치방법회제료각립급조분적공간분포도.결과표명:폐황하삼각주표층침적물중사조분구유교강적공간자상관성,기자상관거리위30.5 km;점토화분사구유중등적공간자상관성,기자상관거리분별위40.3 km화13.8 km.재대우17.0 km 적척도상,3충립급조분적공간변이성표현출명현적각향이성특정,차이NE55°화SE145°량조상호수직적방향상차이최위명현,저시유우파랑、조류등인소작용소인기적침적물리안제도변화조성적.제도결과현시,폐황하삼각주표층침적물3충립급조분적공간분포상황,점토표현위근안저、원안고;사표현위근안고、원안저,고치구주요재하구부근;분사표현위균균성특정.
A total of 266 surface sediment samples were collected from sea area of the abandon Yellow River delta, north of Jiangsu province in October,2013,and the quality percentage of different grain size components (sand, silt and clay)for each sample was also obtained in the laboratory.A geostatistics method,combined with the Geo-graphic Information System (GIS),was used to analyze spatial variability characteristics of the sand,silt and clay, and Kriging interpolation was used to draw the spatial distribution maps of each grain size components.Results show that sand had a relatively high strong spatial autocorrelation with range of autocorrelation extending to about 30.5 km.In comparison,clay and silt had a middle strong spatial autocorrelation with ranges of around 40.3 km and 13.8 km,respectively.The spatial variability of different grain size components was apparent in isotropy within the maximum extent of 17.0 km,beyond which their anisotropy was increasing,especially between the perpendicu-lar directions of NE40°and SE130°.The spatial distribution of 3 grain size components interpolated through Krig-ing based on the fitted theoretical models depicted that clay was low in the near shore,high in the far shore and sand was high in the near shore,low in the far shore,with higher value areas around the estuaries.However,the silt distribution was in an uniformity characteristics.