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生物絮凝泥沙运动输移数学模型
引用本文:赵慧明,方红卫,王崇浩,池春青.生物絮凝泥沙运动输移数学模型[J].水利学报,2015,46(11):1290-1297.
作者姓名:赵慧明  方红卫  王崇浩  池春青
作者单位:中国水利水电科学研究院, 北京 100048;流域水循环模拟与调控国家重点实验室, 北京 100048,清华大学水利建筑工程系水沙科学与水利水电工程国家重点实验室, 北京 100084,中国水利水电科学研究院, 北京 100048;流域水循环模拟与调控国家重点实验室, 北京 100048,北京沃尔德防灾绿化技术有限公司, 北京 100048
基金项目:国家自然科学基金项目(51479213);国家科技支撑计划项目(2013BAB12B01,2013BAB12B04);清华大学水沙科学与水利水电工程国家重点实验室开放研究基金资助课题(sklhse-2014-B-01)
摘    要:近几十年来,河流中生物絮凝泥沙的运动输移对河流生态系统与水工建筑物等造成的影响,已逐渐成为一个研究热点。本文将泥沙运动输移模型与生物絮凝机理模型耦合起来,构建生物絮凝泥沙运动输移数学模型,以预测富营养水生态系统中生物絮凝泥沙运动输移过程中的浓度及水位变化。模型中,通过求解一维非恒定流圣维南方程来计算水流,将生物絮凝视为导致悬浮泥沙絮团粒径变化的主要因素,通过不饱和非均匀输沙(泥沙/絮团)方法来模拟生物絮凝泥沙的运动。利用文献数据和室内水槽实验来验证生物絮凝泥沙运动输移数学模型,模拟结果与实验数据吻合较好,表明所构建的一维数学模型可以较好地模拟生物絮凝泥沙的输移特性。

关 键 词:生物絮凝泥沙  生物膜  一维数学模型  泥沙输移
收稿时间:4/2/2015 12:00:00 AM

Numerical modelling of bio-flocculated sediment transport
ZHAO Huiming,FANG Hongwei,WANG Chonghao and CHI Chunqing.Numerical modelling of bio-flocculated sediment transport[J].Journal of Hydraulic Engineering,2015,46(11):1290-1297.
Authors:ZHAO Huiming  FANG Hongwei  WANG Chonghao and CHI Chunqing
Affiliation:China Institute of Water Resources and Hydropower Research, Beijing 100048, China;State Key Laboratory of Simulation and Regulation of River Basin Water Cycle, Beijing 100048, China,State Key Laboratory of Hydro Science and Engineering, Tsinghua University, Beijing 100084, China,China Institute of Water Resources and Hydropower Research, Beijing 100048, China;State Key Laboratory of Simulation and Regulation of River Basin Water Cycle, Beijing 100048, China and Beijing World Hazard Preventing Tech Company, Ltd, Beijing 100048, China
Abstract:The possible effects of bio-flocculated sediment transport on the river eco-system and hydraulic structures have gradually become a research focus in recent decades. This paper focuses on the validation of the sediment transport module and its coupling with the mechanistic model of sediment bioflocculation(BFLOC) to build a 1D numerical model of bioflocculation sediment transport to predict the water level and sediment concentration of biological flocculation sediment aggregates in nutrient-rich aqueous ecosystems. In the model, the flow is calculated by solving the Saint-Venant equations for one-dimensional unsteady flow. The biological flocculation of sediment is considered to be the main reason for the size changes of sediment flocculation. Biological flocculation sediment transport is simulated through the unsaturated non-uniform sediment transport method. Validation of the bioflocculation sediment transport model is accomplished through the simulation of one test case in experimental flume. The agreement with measurements is generally good.
Keywords:bioflocculation sediment  biofilm  1D numerical model  sediment transport
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