【摘要】：基于對泰國灣164個表層沉積物樣品的粒度分析測試結果,使用Gao-Collins沉積物粒徑趨勢分析方法,研究了泰國灣底質沉積物的分布特征和輸運趨勢。研究區(qū)內的沉積物主要為粉砂、砂質粉砂和粉砂質砂,分選差,分選系數(shù)變化范圍為1.3~2.9,平均值為1.8,偏度變化范圍為-1.8~2.5,平均值為1.2。根據(jù)沉積物粒度趨勢特征,研究區(qū)分為1區(qū)、2區(qū)和3區(qū)3個區(qū)域,其中1區(qū)的平均分選系數(shù)和偏度分別為1.73、0.91;2區(qū)沉積物分選系數(shù)和偏度分別為1.81和1.33;3區(qū)沉積物分選系數(shù)和偏度分別為1.91和1.24。1區(qū)和2區(qū)河口附近廣泛分布粉砂和泥等細粒級沉積物(平均粒徑為6.5Ф);而1區(qū)與2區(qū)交界處和3區(qū)的近岸區(qū)域沉積物主要為粉砂質砂(平均粒徑為5.5Ф)。研究區(qū)北部、中部和西南部近岸沉積物相比研究區(qū)其他地區(qū),分選更差一些。泰國灣沉積物運移受河流、洋流和季風的共同影響,其中1區(qū)受控因素為泰國灣灣口的河流,運移方向為從河口向外;洋流是2區(qū)南部沉積物的主要運移動力,運移方向為從外圍向灣中心;沿岸流是3區(qū)沉積物的主要運移動力,使3區(qū)沉積物的運移方向為離岸方向。在河流和洋流共同作用下,泰國灣沉積物有向蘇梅島附近運移的趨勢。
[Abstract]:Based on the results of particle size analysis of 164 surface sediment samples in the Gulf of Thailand, the distribution characteristics and transport trends of sediment in the Gulf of Thailand were studied by using the method of Gao-Collins particle size trend analysis. The sediment in the study area is mainly silty sand, silty sand and silty sand, with poor sorting, the range of separation coefficient is 1.3m2.9. the average value is 1.8. the variation range of deviation is -1.80.5.The average value is 1.2. According to the grain size trend characteristics of the sediments, the study was divided into 3 regions: 1, 2 and 3. The average separation coefficient and deviation of sediment in area 1 were 1.73 / 0.91 and 1.81, respectively, and the deviation of sediment in area 1.3393 were 1.91, 1.24.1 and 1.24.1, respectively. The fine silt and mud were widely distributed near the estuary of area 2. The grain-grade sediment (average diameter is 6.5), while the silty sand is the main sediment in the coastal area at the junction of area 1 and region 2 and in area 3 (the average particle size is 5.5). The near shore sediments in the north, middle and southwest of the study area are worse than other areas in the study area. Sediment transport in the Gulf of Thailand is affected by rivers, ocean currents and monsoons. The controlled factors in area 1 are the rivers at the mouth of the Gulf of Thailand, and the direction of transport is from the estuary to the outside, and the ocean current is the main transport power of the sediments in the southern part of area 2. The direction of migration is from the periphery to the center of the bay, and the coastal current is the main transport power of the sediments in the three zones, which makes the direction of the sediment migration in the three zones offshore. Under the interaction of rivers and ocean currents, the sediments of the Gulf of Thailand tend to migrate to the vicinity of Koh Mui Island.
【作者單位】： 國家海洋局第一海洋研究所;海洋沉積與環(huán)境地質國家海洋局重點實驗室;青島海洋科學與技術國家實驗室海洋地質過程與環(huán)境功能實驗室;海洋與海岸資源研究中心海洋和海岸資源室;泰國普吉海洋生物中心;
【基金】：全球變化與海氣相互作用專項(GASI-02-SCS-CJ03,GASI-GEOGE-03) 青島海洋科學與技術國家實驗室鰲山科技創(chuàng)新計劃項目(2015ASKJ03) 東南亞海岸帶脆弱性合作調查研究
【分類號】：P736.21

【參考文獻】

相關期刊論文 前10條

1 吳，

本文編號：2143781