有浮泥水域的平面二维泥沙数学模型研究  

2D numerical model for suspended sediment transport in tidal area with fluid mud

作　　者：马进荣[1] 罗肇森[2] 张晓艳[3] 

机构地区：[1]河海大学水文水资源和水利工程科学国家重点实验室,江苏南京210098 [2]南京水利科学研究院,江苏南京210029 [3]广东省水利水电科学研究院,广东广州510000

出　　处：《泥沙研究》2008年第5期49-53,共5页Journal of Sediment Research

摘　　要：近底泥沙存在底沙和悬沙的频繁交换,数学模型难以精确模拟,浮泥的发育更使近底泥沙边界条件趋于复杂,一个有效的平面二维泥沙数学模型需要正确处理挟沙力、起动流速、泥沙沉速等泥沙参数,本文应用罗肇森对浮泥研究得到的理论和经验公式,成功模拟了椒江口和灵江河段的潮流运动及水体含沙量分布特征,合理预测了水下地形的冲淤变化特点,对有浮泥发育的河口及近海水沙模拟研究作了有益的探索。It is very difficult to simulate sediment transport near the bed by numerical models because of the sediment exchange between bed load and suspended load. The sediment boundary near the bed will be more complicated if there is fluid mud on the bed. For this case, an efficient model must properly deal with sediment carrying capacity, incipient velocity, and settling velocity, etc. In this paper a model based on fluid mud theory and formulas developed by Luo Zhaosen is introduced. The model has been applied to the Jiaojiang estuary and can reasonably simulate the tidal current, suspended sediment concentration distribution and channel bed variation. This study is an exploring work on sediment simulation under fluid mud condition.

关 键 词：浮泥 数学模型 挟沙力 椒江口 

分 类 号：O242[理学—计算数学]