人工浮岛阻水效应试验研究  

Experimental Research on Damming Effect of Artificial Floating Island

作　　者：王佳铭 陈月君 傅宗甫[1] 李露蓉 吕家才[1] WANG Jia-ming;CHEN Yue-jun;FU Zong-fu;LI Lu-rong;LÜJia-cai(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,Jiangsu Province,China;Key Laboratory of Lower Yellow River Channel and Estuary Regulation,Ministry of Water Resources,Yellow River Institute of HydraulicResearch,Zhengzhou 450003,Henan Province,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei Province,China;Jsti Group,Nanjing 210019,Jiangsu Province,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]黄河水利委员会黄河水利科学研究院水利部黄河下游河道与河口治理重点实验室,河南郑州450003 [3]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [4]苏交科集团股份有限公司,江苏南京210019

出　　处：《中国农村水利水电》2023年第4期40-45,53,共7页China Rural Water and Hydropower

基　　金：国家重点研发计划资助项目(2018YFD0900805);黄河水利科学研究院科技发展基金项目(黄科发202103)。

摘　　要：近年来,人工浮岛技术作为一种新型的绿色水处理工艺,广泛应用于河道净水技术中,但浮岛阻水的负面影响也正日益突显。依据浮岛在河道中的运用特点,通过概化物理模型试验数据,系统分析了浮岛前壅水值对人工浮岛的阻水效应,定义了阻水系数为表征阻水效应的特征值,探究了浮岛阻水效应影响因素及其影响规律。试验采用量纲分析法和正交设计试验,并结合敏感性分析,确定了人工浮岛阻水效应的主要影响因素。基于最小二乘原理,对主要影响因素与阻水系数之间的关系进行多元回归分析,得到了数学表达式。结果表明:浮岛的存在,使得其上游出现水位壅高,下游出现水位降低的现象。而阻水系数的大小与试验因素浮岛尺寸、河道水深、浮岛吃水深度、河道宽度、浮岛离岸距离有关,其中,阻水系数与弗劳德数、浮岛相对宽度(浮岛宽度与河道宽度的比值)和相对吃水深度(浮岛吃水深度与河道水深的比值)分别成幂函数正相关。In recent years,a kind of new purification technology of polluted river water,the artificial floating island has been widely used.This technology is pollution-free in the whole process of the water treatment,but its negative effects on water resistance have been becoming increasingly evident.In this paper,a general physical model experiment is conducted by considering the application characteristics of float⁃ing islands in rivers.Based on the experimental data,this paper systematically analyzes the damming effect upstream of artificial floating is⁃lands,defines the damming coefficient to characterize this effect,and investigates the influential factors and changes rules of the damming effect.The methods of dimensional analysis and orthogonal design tests are used,combined with sensitivity analysis.According to the analy⁃sis,the main influencing factors of the damming effect of artificial floating islands are identified.Based on the Least Squares Method,a multiple regression analysis on the relationship between the main influencing factors and the damming coefficient is carried out and a mathematical expression is obtained.The results show that the presence of floating islands causes the phenomenon of water level enhancement upstream and water level reduction downstream.The magnitude of the damming coefficient is related to the factors of floating island size,river depth,floating island draft,river width and distance from the floating island.The damming coefficient is positively related to the Froude Number,the relative width of the floating island(the ratio of side length of floating island to channel width)and the relative draft depth(the ratio of draft depth to river depth),respectively.And the above positive relations tend to the power functions.

关 键 词：人工浮岛 概化物理模型试验 阻水系数 阻水效应 

分 类 号：TV131.6[水利工程—水力学及河流动力学]