ΔDO单一指标评价景观水体富营养化的研究  

Evaluating Eutrophication of Landscape Water by Single Index of ΔDO

作　　者：王怡[1] 杨亮亮[1] 李智[1] 王文怀 韦存智 WANG Yi;YANG Liang-liang;LI Zhi;WANG Wen-huai;WEI Cun-zhi(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《中国给水排水》2018年第23期64-68,共5页China Water & Wastewater

基　　金：陕西省自然科学基础研究基金重点资助项目(2016JZ019)

摘　　要：提出了采用水中溶解氧昼夜浓度最大差值(ΔDO)单一指标来及时评价景观水体富营养化程度的方法。在光暗比为1∶1、温度为25℃、光照强度为2 000 lx条件下,通过测定不同纯藻的光合产氧速率和叶绿素a(Chl-a)浓度,以及实际混合藻群的DO、ΔDO和Chl-a浓度,建立了不同藻种及混合藻群ΔDO与Chl-a浓度的关系,探讨了采用ΔDO单因素评价景观水体富营养化程度的可能性。结果表明,在含铜绿微囊藻、小球藻、伪鱼腥藻、混合藻群的实际景观水体中,ΔDO与Chl-a浓度的Pearson相关系数分别为0. 95、0. 96、0. 97和0. 93,相关性显著。因此,采用ΔDO作为富营养化程度单因素评价指标有一定的可行性。此外,还确定了不同ΔDO对应的水体富营养化程度范围,可为景观水体富营养化程度评价提供有效、快捷的方法。A method was proposed to timely evaluate the degree of eutrophication of landscape water by using a single index of the day and night maximum concentration difference of dissolved oxygen (△DO)in water.The correlations between ADO and chlorophyll a (Chl-a)concentration of different algal species and mixed algal species were established,through measuring the photosynthetic oxygen production rate and Chl-a concentration of different pure algae and DO,ADO and Chl-a concentration of actual mixed algal group,under the condition of light to dark ratio of 1:1,temperature of 25℃ and light intensity of 2000lx.The experimental results showed that the Pearson correlation coefficients between ADO and Chl-a concentration in the actual landscape water containing Microcystis aeruginosa,Chlorella, Pseudomonas sp.and mixed algae were 0.95,0.96,0.97 and 0.93 respectively,which showed a significant positive correlation.Therefore,it was feasible to use ADO as a single index to evaluate the degree of eutrophication.In addition,the degree of eutrophication could be determined according to the range of ADO,which provided an efficient and quick method for the evaluation of eutrophication degree of landscape water.

关 键 词：景观水体 富营养化 溶解氧 溶解氧昼夜浓度最大差值 光合产氧速率 评价方法 

分 类 号：TU992[建筑科学—市政工程]