文章摘要
杜彦良,彭文启,刘畅.分层湖库溶解氧时空特性研究进展[J].水利学报,2019,50(8):990-998
分层湖库溶解氧时空特性研究进展
A review of dissolved oxygen variation and distribution in the stratified lakes or reservoirs
投稿时间:2019-03-07  
DOI:10.13243/j.cnki.slxb.20190147
中文关键词: 分层湖库  溶解氧时空变化  变温层溶解氧极小(MOM)  滞温层缺氧  湖库缺氧
英文关键词: stratified lake or reservoir  dissolved oxygen dynamics  metalimnetic oxygen minimum (MOM)  hypolimnetic oxygen depletion  hypoxia in lake or reservoir
基金项目:国家自然科学基金项目(51861135314);国家重点研发计划(2017YFC0405804,2016YFC0401701)
作者单位
杜彦良 中国水利水电科学研究院, 水环境研究所 北京 100038 
彭文启 中国水利水电科学研究院, 水环境研究所 北京 100038 
刘畅 中国水利水电科学研究院, 水环境研究所 北京 100038 
摘要点击次数: 148
全文下载次数: 126
中文摘要:
      溶解氧(DO)是湖库水质管理的关键变量之一,对维持湖库生态系统平衡至关重要。受控于湖库生态、生物地球化学和物理过程的相互作用,湖库DO对气候、地理、富营养化、有机污染、水文及负荷的输入等环境压力反应敏感。随着监测技术的提高、实验分析的多样、模型工具的完善,溶解氧垂向分层机理研究也更加深入。分层湖库的表面温水层因大气复氧、光合作用等的影响DO饱和程度高,变温层DO与受透明度影响的浮游生物呼吸与光合作用、水平和表层等外部物质输入、有机物沉积过程分解等机制有关,DO垂向形态多样,其中变温层DO极小值广泛存在且成因复杂。滞温层缺氧与沉积物、初级生产力、外部输入湖库大小等有关,通过数据分析和模型手段,滞温层DO演变过程得到较好的解释。由于分层湖库影响DO时空分布的因素众多,个别因子或经验公式分析,很难对湖库DO现象做出全面精确的描述,基于机理及过程的数值模型是DO研究中必不可少的工具。针对分层湖库越来越普遍的缺氧现象,为水质和生态环境的改善提出合理的科学措施,提高水库管理,采用原位监测、经验参数、公式和数值模型等手段,揭示湖库溶解氧的演变机理,是需要继续深入研究的课题。
英文摘要:
      Dissolved oxygen (DO), one of the key variables in water quality management, is essential for the ecosystem functioning of these lentic ecosystems. Due to the interactions of lakes,ecology,biogeochem-istry and physical processes, DO reacts highly sensitive against environmental stressors like climate change, geography, eutrophication, organic pollution, and hydrology and loads process. With the improvement of monitoring technology, deeper data analysis, and modeling tools, the research on vertical delamination of dissolved oxygen has become more in-depth. The DO is high saturated in the epilimnion due to atmospher-ic oxygenation, photosynthesis, while metalimnetic oxygen is varying by respiration, photosynthesis, advec-tion, vertical diffusion organic deposition and so on. Metalimnetic oxygen minima (MOM), a popular phe-nomenon in lentic systems, is more complicated and still no fully explained. The hypolimnetic DO deple-tion is related to sediments deposition, primary productivity, and income loads, and it is intensively stud-ied and well predictable. Since the temporal and spatial distribution of DO is influenced by lots of factors in the stratified lentic system, it is difficult to make a full and accurate description of the DO phenome-non based on the individual factors or analysis or simple empirical formulas. Processes based numerical mod-els are the indispensable tools for DO research. The hypoxia phenomena in stratified lentic water are more in response to the increasingly widespread hypoxia phenomena in stratified lentic system,the scientific mea-sures and reasonable reservoir management should be put forward to improve the water quality and ecologi-cal functions. Applying the high-resolution monitoring technique, empirical methods and numerical models, the mechanism of oxygen dynamics is still a subject that needs further study.
查看全文   查看/发表评论  下载PDF阅读器
关闭