CAJ | 학술논문

水体中磷的迁移转化过程，对于河流生态环境有着至关重要的影响。传统的水质模型缺乏对磷迁移转化过程机理和规律的深入探讨与分析。本文建立河流中水动力-泥沙-磷迁移过程的分相模型，在水流运动与泥沙输移模拟的基础上，从基本的化学反应出发，研究磷在河流中的迁移过程。首先，考虑天然河流中磷的来源及其不同形态，基于泥沙颗粒表面电荷非均匀分布的认识，利用修正后的表面络合模型研究悬移质泥沙对磷的吸附；其次，分析有氧与无氧条件下泥沙颗粒中铁/铝（氢）氧化物的不同形态，以描述磷在活性底泥层中的赋存形式；然后，重点关注河床冲淤变形，分析磷在河床表面的沉积与再释放。最后，本文设计磷水槽试验，分析泥沙颗粒运动对磷迁移的影响，并对模型进行验证。结果表明，泥沙运动对磷迁移有显著影响，磷浓度沿程分布与含沙量间存在较好的线性关系，尤其是溶解相磷；本文建立的模型可以合理地反映磷随着泥沙颗粒的迁移过程。
수체중린적천이전화과정，대우하류생태배경유착지관중요적영향。전통적수질모형결핍대린천이전화과정궤리화규률적심입탐토여분석。본문건립하류중수동력-니사-린천이과정적분상모형，재수류운동여니사수이모의적기출상，종기본적화학반응출발，연구린재하류중적천이과정。수선，고필천연하류중린적래원급기불동형태，기우니사과립표면전하비균균분포적인식，이용수정후적표면락합모형연구현이질니사대린적흡부；기차，분석유양여무양조건하니사과립중철/려（경）양화물적불동형태，이묘술린재활성저니층중적부존형식；연후，중점관주하상충어변형，분석린재하상표면적침적여재석방。최후，본문설계린수조시험，분석니사과립운동대린천이적영향，병대모형진행험증。결과표명，니사운동대린천이유현저영향，린농도연정분포여함사량간존재교호적선성관계，우기시용해상린；본문건립적모형가이합리지반영린수착니사과립적천이과정。
Phosphorus transport in natural water plays a crucial role in ecological environment. Traditional models of water quality mostly simplify such processes into some empirical parameters,without a comprehen-sive understanding of the intrinsic mechanisms. In this paper, a model of hydrodynamic-sediment-phospho-rus transport has been established, in which the chemical and sediment dynamics are integrated to study the phosphorus transport with river sediment. The phosphorus adsorption by sediment is considered using the modified surface complexation modeling based on the heterogenous surface charge distribution of natural sediment. In addition, the aerobic layer and anaerobic layer are distinguished to study the distribution of phosphorus between dissolved phase and particulate phase in the active sediment layer. Furthermore,the riv-erbed deformation is introduced to analyze the deposition and release of phosphorus at the bed surface. A flume experiment is designed to study the effects of sediment on phosphorus transport and validate the mod-el. The results show that the phosphorus concentration is linearly correlated with sediment concentration, and the proposed model can reasonably reflect the phosphorus transport with sediment.