夏季风下的太湖风场-流场野外观测研究  

Study on Taihu Lake’s wind field and flow field under summer monsoon

作　　者：丁文浩 秦伯强[1] 吴挺峰[1] 王汗 许王辰 DING Wenhao;QIN Boqiang;WU Tingfeng;WANG Han;XU Wangchen(State Key Laboratory of Lake Science and Environment,Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China;School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,江苏南京210008 [2]中国科学院大学资源与环境学院,北京100049 [3]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [4]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《河海大学学报（自然科学版）》2020年第2期102-108,共7页Journal of Hohai University(Natural Sciences)

基　　金：国家重点研发计划(2017YFC0405205);中国科学院前沿科学重点研究项目(QYZDJ-SSW-DQC008);国家水体污染控制与治理科技重大专项(2017ZX07203);国家自然科学基金(41661134036)。

摘　　要：为研究太湖风场特征、湖流特征以及不同类型风场对太湖湖流的影响,在太湖不同区域布设6台多普勒剖面流速仪和4座气象站,获取同步流场和风场数据,分析夏季风与湖流流场的关系。结果表明:(a)风场方面,空间分布具有不均匀性,各观测点间风速差异较大,各观测点间风向随风速减小而差异扩大化。(b)太湖流场具有明显的风生流特征:空间上,大风(时段平均风速在6.7 m/s以上)情况下,西部湖区出现逆时针环流,湖流分层不明显;小风(时段平均风速在3.8 m/s以下)情况下,没有明显的环流出现,上、下层湖流分层明显,各层流向相对稳定但不相同,补偿流发育。(c)流速方面,10 cm/s以下流速比率90%以上,局部区域水流速度在强风条件下可达20 cm/s。In order to obtain the characteristics of wind field and flow field as well as the influence of different types of wind fields on the flow field of Taihu Lake,6 acoustic doppler current profilers(ADCP)and 4 meteorological stations were set up in different areas of Taihu Lake,and the synchronous data of flow field and wind field were obtained.The results show the floolwing:(a)The spatial distribution of wind field in Taihu Lake was not uniform,the wind speed varied greatly among 4 stations,and the difference of wind direction was expanded along with the decrease of wind speed.(b)The flow field in Taihu Lake had obvious characteristics of wind-generated flow.When the average wind speed was greater than 6.7 m/s,there was a counterclockwise circulation that appeared in the western lake area,and there was no obvious flow stratification during this period.When the average wind speed was less than 3.8 m/s,the circulation in the west fade away.However,the flow stratification was obviously developed,the current direction of each layer was relatively stable but different,and the compensation flow developed.(c)According to the observed data,the percentage of current speed less than 10 cm/s was more than 90%,and the current speed can reach 20 cm/s under strong wind conditions.

关 键 词：太湖 风场 流速 流向 补偿流 声学多普勒测流剖面仪 

分 类 号：TV131.2[水利工程—水力学及河流动力学]