云南高原湖泊溶解氧达标考核要求探讨  

Assessing requirements for dissolved oxygen in Yunnan plateau lakes

作　　者：黄钰铃[1] 方金鑫[2] 王泽平[2] 关梦南 冯顺新[1] HUANG Yuling;FANG Jinxin;WANG Zeping;GUAN Mengnan;FENG Shunxin(China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Lijiang Branch of Yunnan Hydrology and Water Resources Bureau,Lijiang 674100,China)

机构地区：[1]中国水利水电科学研究院,北京100038 [2]云南省水文水资源局丽江分局,云南丽江674100

出　　处：《中国水利水电科学研究院学报（中英文）》2022年第5期387-393,共7页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家重点研发计划项目(2017YFC0405205)。

摘　　要：溶解氧是表征地表水环境质量的重要指标之一。以云南省泸沽湖、抚仙湖、洱海及程海为例,通过资料收集与数据统计,分析高原湖泊表层溶解氧浓度及氧饱和率特征,提出高原湖泊溶解氧达标考核要求建议。结果表明:云南高原湖泊溶解氧达标考核过程中,根据水功能区划要求对氧浓度进行考核,若氧浓度未达到标准,则根据温度和海拔计算氧饱和率并进行考核,满足标准即可判定为溶解氧达标;达标考核中,Ⅰ类标准限值可取氧浓度≥7.5mg?L或氧饱和率≥80%;Ⅱ类标准限值可取氧浓度≥6mg?L或氧饱和率≥70%;Ⅲ类标准限值可取氧浓度≥5mg?L或氧饱和率≥60%;Ⅳ类标准限值可取氧浓度≥3mg?L或氧饱和率≥50%。结果可为高原湖泊水环境管理提供参考。Dissolved oxygen is one of the important parameters measuring surface water quality.Some plateau lakes such as the Lugu Lake,the Fuxian Lake,the Erhai Lake as well as the Chenghai Lake in Yunnan province,were taken as the cases to study the characteristics of the oxygen concentration together with the oxygen saturation rate in the surface water,and some advice on the dissolved oxygen assessment was proposed accordingly.The results show that for the dissolved oxygen assessment of the plateau lakes in Yunnan province,the oxygen concentration could be assessed according to the requirements of water function zone.When the oxygen concentration does not reach the standard limit value,the oxygen saturation rate calculated according to the temperature and altitude could be as-sessed alternatively.If the oxygen saturation rate meets the standard value,it means the dissolved oxygen reaches the assessing requirements.In the assessment,for the waters classified into“the first class”,the oxygen concen-tration should be greater than or equal to 7.5 mg/L or the oxygen saturation rate be no less than 80%;for“the sec-ond class”waters,the oxygen concentration should be greater than or equal to 6mg/L or the oxygen saturation rate be no less than 70%;for“the third class”waters,the oxygen concentration should be greater than or equal to 5 mg/L or the oxygen saturation rate be no less than 60%;3 mg/L for oxygen concentration or 50%for oxygen satu-ration rate can be employed as the assessing requirement for“the fourth class”waters.The results may provide sup-ports for water environment management on plateau lakes.

关 键 词：高原湖泊 溶解氧 达标考核 氧浓度 氧饱和率 

分 类 号：X524[环境科学与工程—环境工程]