【摘要】：本文根據(jù)2007年黃河調水調沙期間黃河三角洲及其毗鄰海域的水文、泥沙調查數(shù)據(jù)資料,使用Mike 3三維水沙數(shù)值模型模擬了黃河調水調沙全過程(低流量、高流量、高含沙量)入海水沙輸運過程,揭示了人造洪峰下水沙擴散范圍和特征,分析了泥沙入海后的沉積動力學機制。研究發(fā)現(xiàn):入海淡水和表層細顆粒泥沙主要以異輕羽狀流形式向外海和河口兩側沿岸擴散,中、底層粗顆粒泥沙向外海擴散非常有限,有少量向河口兩側沿岸擴散,擴散范圍小于表層;河口區(qū)在漲-落、落-漲潮流轉換時刻分別存在著潮流切變鋒,切變鋒均形成在淺水區(qū),而后向深水區(qū)移動,切變鋒的發(fā)生對泥沙向外海擴散有著明顯的阻隔作用。
[Abstract]:Based on the hydrological and sediment survey data of the Yellow River Delta and its adjacent waters during the Yellow River water and sediment transfer period in 2007, the whole process (low discharge, high discharge) of the Yellow River water and sediment transfer is simulated by using the Mike 3 three-dimensional water and sediment numerical model. The transport process of high sediment content into seawater reveals the range and characteristics of sediment diffusion by artificial Hong Feng, and analyses the sedimentary dynamic mechanism of sediment after it enters the sea. It is found that the fresh water and surface fine granular sediment in the sea mainly diffused to the offshore and both sides of the estuary in the form of hetero-plume flow, and the coarse sediment in the bottom layer diffuses to the outer sea very limited, and a small amount of sediment diffuses to the banks of both sides of the estuary. The diffusion range is smaller than that of the surface layer, the tidal shear front is formed in shallow water and then moves to deep water in the estuary area at the transition time of rising-falling and falling-rising tidal current, and the shear front is formed in the shallow water area, and then moves to the deep water area. The occurrence of shear front has an obvious barrier effect on sediment diffusion to the sea.
【作者單位】： 中國海洋大學海底科學與探測技術教育部重點實驗室;中國氣象科學研究院災害天氣國家重點實驗室;
【基金】：國家重點基礎研究發(fā)展計劃項目(2010CB951202)資助~~
【分類號】：TV148

【相似文獻】

相關期刊論文 前10條

1 張永利;霍明靜;尹磊;吳復建;;黃河調水調沙對菏澤閆潭引黃灌區(qū)前進防沙閘引水的影響[J];山東水利;2006年05期

2 楊淼 ,管志光;現(xiàn)代治黃史上不朽的豐碑——記黃河調水調沙原型試驗[J];防災博覽;2002年06期

3 邢華;宮曉東;何敏;;黃河調水調沙對黃河口濕地土壤的影響[J];中國科技信息;2011年18期

4 初建;;黃河調水調沙的作用及影響[J];才智;2008年13期

5 李國英;;黃河調水調沙關鍵技術[J];前沿科學;2012年01期

6 葛雷;婁廣艷;張軍鋒;王聯(lián)鵬;;2010年黃河調水調沙對河口近海鹽度影響[J];河南水利與南水北調;2013年01期

7 蘇青;;黃河調水調沙與河流健康[J];科技導報;2008年17期

8 馬駿;李曉;許珂艷;;2008年黃河調水調沙效果分析[J];水資源與水工程學報;2008年05期

9 盧海燕;岳三利;張偉;;黃河調水調沙對下游河道的作用[J];科技信息;2008年29期

10 王婷;劉淑霞;;2004年黃河調水調沙期間溶解無機態(tài)營養(yǎng)鹽變化研究[J];中國石油和化工標準與質量;2012年12期

相關會議論文 前7條

1 趙咸榕;張t熁，

本文編號：2247939