【摘要】：基于2013年3月29-31日河口攔門沙外固定船載和座底三腳架觀測數(shù)據(jù),分析了磨刀門河口細(xì)顆粒泥沙絮凝體發(fā)育規(guī)律及其影響因素。磨刀門河口水體中絮凝體約以62.5μm為臨界粒徑分成大、小絮凝體兩種存在形式,且以小絮凝體組分為主;磨刀門河口水體鹽度對絮凝體發(fā)育影響作用不明顯,含沙量變化在一定條件下可以促進(jìn)絮凝體發(fā)育;波流動力是控制絮凝體發(fā)育的主要因素,其中流速大致以0.32 m/s為臨界值,波浪以0.75 m為臨界有效波高,均對絮凝體的發(fā)育存在雙重影響作用。波流聯(lián)合動力對絮凝體發(fā)育影響較為復(fù)雜,不同階段對絮凝體發(fā)育主控因素有所差異,磨刀門河口細(xì)顆粒泥沙的絮凝臨界剪切應(yīng)力約為1.25N/m2,波、流同時達(dá)到絮凝臨界值時為絮凝體發(fā)育最佳條件。
[Abstract]:Based on the observation data of external fixed ship load and bottom tripod of Estuary sand from March 29 to 31, 2013, the development law and influencing factors of fine sediment flocculant in Mudaomen Estuary were analyzed. The floc in Moqaomen Estuary is divided into two forms with the critical particle size of 62.5 渭 m, and the small flocculant is the main component, and the effect of salinity on the development of flocs is not obvious, and the change of sediment concentration can promote the development of flocs under certain conditions, and the effect of salinity on the development of flocs is not obvious, and the change of sediment content can promote the development of flocs under certain conditions. Wave dynamics is the main factor controlling the development of flocs, in which the velocity of flow is about 0.32 m 鈮，

本文編號：2498830