本文選題：沉積物組分 + 粒度參數(shù)　； 參考：《沉積學(xué)報》2016年03期

【摘要】：基于海南西部四更沙及其鄰近海域185個底質(zhì)的粒度數(shù)據(jù),并結(jié)合研究區(qū)動力狀況和水深地形特征,研究表層沉積物的組分和類型分布、粒度參數(shù)及其沉積環(huán)境分區(qū)。結(jié)果表明:1研究區(qū)沉積物類型多樣,包括12種沉積類型,以砂質(zhì)粉砂、粉砂、粉砂質(zhì)砂和含礫砂為主,沉積物平均粒徑變化范圍較大(-0.70~7.13?),且大體呈現(xiàn)由北向南逐漸變細(xì)的分布趨勢;2運(yùn)用Fleming的三角圖式,結(jié)合物源狀況及地形地貌條件,對沉積環(huán)境進(jìn)行劃分,將研究區(qū)劃分為四更沙岸外海濱沉積區(qū)、北黎灣中部沉積區(qū)和八所港近岸沉積區(qū)等3個沉積區(qū);3研究區(qū)沉積物分布特征受沉積物來源和水動力及地形條件共同影響。橫向分布上,西部主要受強(qiáng)潮流輸沙影響,東部近岸則主要受波浪掀沙和搬運(yùn)作用影響,表現(xiàn)為兩側(cè)粗,中間相對較細(xì)的特征�？v向上,四更沙岸外海濱沉積區(qū),沉積物主要受昌化江影響,粒徑粗,表現(xiàn)為河口沉積特征;北黎灣中部沉積區(qū),沉積物粒徑分布范圍廣,表現(xiàn)為較強(qiáng)的過渡區(qū)特性;八所港近岸沉積區(qū),沉積物粒徑最細(xì),泥沙來源主要為外海帶來的泥沙。
[Abstract]:Based on the granularity data of 185 sediments in the west of Hainan and its adjacent sea areas, the composition and type distribution, granularity parameters and sedimentary environment zoning of the surface sediments are studied in combination with the dynamic status of the study area and the characteristics of the bathymetric topography. The results show that there are many types of sediments in the study area, including 12 sedimentary types, mainly sandy silt, silty sand and gravel sand. The average grain size of sediments varies from 0.70 to 7.13, and shows a trend of gradually thinning from north to south. The sedimentary environment is divided by using the triangular diagram of Fleming, combining with the source status and topographic and geomorphological conditions. The study zonation is divided into four seashore sedimentary areas, three sedimentary areas, I. e., the central sedimentary area of North Li Bay and the nearshore sedimentary area of Bazhonggang. The sediment distribution characteristics of the study area are affected by the sediment source, hydrodynamic and topographic conditions. In the transverse distribution, the west is mainly affected by strong tidal current and sediment transport, while the east coast is mainly affected by wave sand lifting and transport, showing the characteristics of coarse sides and relatively fine middle. Longitudinally, the sediment is mainly influenced by Changhua River, and its grain size is coarse, showing the characteristics of estuarine sedimentation, while in the middle of North Li Bay, the sediment size distribution range is wide, and the sediment is characterized by strong transition zone. The sediment size is the smallest in the near shore sedimentary area of Bazhonggang, and the sediment source is mainly the sediment brought by the sea.
【作者單位】： 華東師范大學(xué)河口海岸學(xué)國家重點實驗室;
【基金】：海洋公益性行業(yè)科研專項經(jīng)費項目(201405037) 河口海岸學(xué)國家重點實驗室自主課題(SKLEC-2012KYYW06)~~
【分類號】：P736.21
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本文編號：1899202