衡水湖入湖口湿地水流特征分析  

Analysis of Flow Characteristics in Hengshui Lake Inlet Wetland

作　　者：徐卫刚 于一雷[1,2] 郭嘉 马牧源[1,2] 李肖夏 赵娜娜[1,2] XU Wei-gang;YU Yi-lei;GUO Jia;MA Mu-yuan;LI Xiao-xia;ZHAO Na-na(Institute of Wetland Research,Chinese Academy of Forestry,Beijing 100091,China;Beijing Key Laboratory of Wetland Services and Restoration,Beijing 100091,China)

机构地区：[1]中国林业科学研究院湿地研究所,北京100091 [2]湿地生态功能与恢复北京市重点实验室,北京100091

出　　处：《水电能源科学》2019年第10期34-37,共4页Water Resources and Power

基　　金：中国林业科学研究院中央级公益性科研院所基本科研业务费专项(CAFINT2014C15);国家自然科学基金项目(51609243);中国水利水电科学研究院流域水循环模拟与调控国家重点实验室开放研究基金(IWHR-SKL-201612p)

摘　　要：针对衡水湖地区入湖口湿地的典型特征,在衡水湖入湖口布设模拟试验区对香蒲植物种群内部流速分布进行研究,结果表明湿地中间断面平均流速在植被段前衰减较快并迅速达到基本稳定,变化幅度较小,与流量的关系不明显。边壁沿程断面则表现为断面平均流速逐渐增加后达到稳定趋势。流速具有明显的异性特性,v向流速与平均流速的趋势较为接近;由于受到植被段前壅水的影响,w向流速在进口断面较大;u向流速值较小且波动不大。沿程和横向方向紊流强度的分布与平均流速的分布规律比较类似,植被带中紊流强度随水深增加而减小,堤岸边壁断面紊流强度较大。研究结果可为衡水湖入湖口湿地设计与管理提供一定的指导与参考。Based on the typical characteristics of Hengshui lake inlet wetland,field experiment was set at the entrance of Hengshui Lake.The velocity distribution of cattail plant population was studied.The results show that the average velocity of the middle section of wetland decreases rapidly and reaches the basic stability.The relationship with flow discharge is not obvious.The average velocity of side section increases gradually and then reaches a stable trend.The flow velocity has evident heterogeneity.The trend of v-direction velocity is close to that of average velocity.Due to the influence of backwater in front of vegetation section,the w-direction velocity is larger in the inlet section.The u-direction velocity is small and does not fluctuate greatly.The distribution of turbulence intensity along and transverse directions is similar to that of the average flow rate.Turbulence intensity decreases with the increase of water depth in vegetation zone.The turbulence intensity of bank boundary wall section is large.These conclusions provide some guidance and reference for the design and management of Hengshui lake wetland.

关 键 词：入湖口湿地 衡水湖 流速分布 紊流强度 湿地水流 

分 类 号：TV131.65[水利工程—水力学及河流动力学]