云南高原湖泊溶解氧达标考核要求探讨
Assessing Requirements of dissolved oxygen in Yunnan Plateau Lakes
投稿时间:2021-12-05  修订日期:2022-06-22
DOI:
中文关键词:  高原湖泊  溶解氧  达标考核  氧浓度  氧饱和率
英文关键词:the plateau lakes  dissolved oxygen  assessment  oxygen concentration  oxygen saturation rate
基金项目:国家重点研发计划(2017YFC0405205)
作者单位邮编
黄钰铃 中国水利水电科学研究院 100038
方金鑫 云南省水文水资源局丽江分局 674100
王泽平 云南省水文水资源局丽江分局 
关梦南 云南省水文水资源局丽江分局 
冯顺新 中国水利水电科学研究院 
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中文摘要:
      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:对受人类活动干扰较少、水环境质量较好的高原湖泊,在溶解氧达标考核中要求氧饱和率超过90%或采用氧浓度自然背景值;对受人类活动干扰较多的高原湖泊,可选择氧浓度或氧饱和率进行评价,I类标准限值可取氧浓度≥7.5 mg/L或氧饱和率≥80%;II类标准限值可取氧浓度≥6 mg/L或氧饱和率≥70%;III类标准限值可取氧浓度≥5 mg/L或氧饱和率≥60%;IV类标准限值可取氧浓度≥3 mg/L或氧饱和率≥50%。结果可为高原湖泊水环境管理提供参考。
英文摘要:
      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 the advices on the dissolved oxygen assessment were proposed accordingly. The results show that for some plateau lakes, where the water quality is well enough with only slight interference from human activities, the oxygen saturation rate being greater than 90% or the background concentration of oxygen can be employed as the assessing requirement; for those lakes where the water quality has suffered relatively great changes during past decades owing to intense artificial interference, either the concentration or the saturation rate of dissolved oxygen can be adopted as the assessing requirement. As to the latter situation, for the waters where the dissolved oxygen is classified into “the first class”, the oxygen concentration should be greater than or equal to 7.5mg/L or the oxygen saturation rate be no less than 80%; for the waters where the dissolved oxygen is classified into “the second class”, the oxygen concentration should be greater than or equal to 6mg/L or the oxygen saturation rate be no less than 70%; for the waters where the dissolved oxygen is classified into “the third class”, the oxygen concentration should be greater than or equal to 5mg/L or the oxygen saturation rate be no less than 60%; 3mg/L for oxygen concentration or 50% for oxygen saturation rate can be employed as the assessing requirement for the fourth class. The results may provide supports for water environment management on plateau lakes.
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