湖泊科学2017，Vol.29Issue(1)：52-58,7.DOI:10.18307/2017.0106
太湖梅梁湾湖区悬浮物动态沉降特征的野外观测∗
Suspended solid settlement characteristics in Meiliang Bay of Lake Taihu：in situ obser-vation
摘要
Abstract
Suspended solid settlement is one of the main transport forms, and plays an important role in lake nutrient release. Thus, study on suspended solid settling velocity is significant to understand the eutrophication. To study the suspended solid set-tling velocity, this paper takes Lake Taihu as an example. Field 9 days-in situ observations were conducted in Meiliang Bay using Acoustic Doppler Velocity, Optical Backscatter Sensor and PH-ⅡHandheld weather stations. The suspended solid settling velocity was estimated by the balance of settling and diffusive flux, and we analyzed the relationship among wind speed, vertical velocity, suspended solid concentration (SSC) and settling velocity. The results were obtained: (1) the mean settling velocity is 0.0785 mm/ s; (2) the vertical velocity and SSC has a great effect on sediment transport in the surface layer; (3) in the bed layer, the re-lationship among settling velocity, vertical velocity and SSC shows that when the wind speed was higher than 1.5 m/ s, the vertical velocity with large fluctuations and high SSC and the settling velocity were slower; when the wind speed was lower than 1.5 m/ s, the vertical velocity was slower and the SSC was small, but settling velocity was quicker, which means the more SSC the quicker settling velocity. It reveals the characteristics of suspended solid settlement in large shallow lakes, which is the necessary foundation in further study of pollutants transport, water environmental mathematic and eutrophication.关键词
沉降速度/悬浮物浓度/太湖/梅梁湾Key words
Settling velocity/suspended solid concentration/Lake Taihu/Meiliang Bay引用本文复制引用
高小孟,李一平,杜薇,罗潋葱,李慧赟,戴淑君,许益新,张兴通,邱勇军..太湖梅梁湾湖区悬浮物动态沉降特征的野外观测∗[J].湖泊科学,2017,29(1):52-58,7.基金项目
中央高校基本科研业务项目基金项目（2014B07314）、国家自然科学基金项目（51579071，51379061）、江苏省普通高校研究生科研创新计划项目（2015B36614）、国家自然科学基金创新研究群体项目（51421006）、江苏省“创新团队计划”项目和江苏省高校优势学科建设工程项目联合资助 （）
