水利水电技术（中英文）2025，Vol.56Issue(10)：111-123,13.DOI:10.13928/j.cnki.wrahe.2025.10.009
糯扎渡水库季节性分层特征及气温变化影响
Seasonal stratification characteristics of Nuozhadu Reservoir and influence of temperature changes
摘要
Abstract
[Objective]Thermal stratification is an important characteristic of lake and reservoir water ecosystems,affecting mixing,convection,nutrient cycling of water bodies,and the vertical distribution of dissolved oxygen(DO).Therefore,understanding the stratification patterns and their key influencing factors is essential.[Methods]Based on the high-frequency profile data collected over one year from Nuozhadu Reservoir,the temporal variations of temperature profiles,thermal stratification parameters,and thermal stability were analyzed on a daily scale.The driving factors of thermal stratification during different stratification periods were explored,and the impact of climate warming on thermal stratification and the water ecological environment was examined.[Results]The water column of Nuozhadu Reservoir showed clear stratification,with significant seasonal variations in the vertical distribution of water temperature and DO.The temperature difference between the surface and the bottom layers ranged from 2.8 to 12.3 ℃,with a minimum DO concentration of 0.59 mg/L occurring in the oxycline.The maximum thermocline thickness reached 14.85 m,while the relative water column stability(RWCS)peaked at 359.9 during the same period.[Conclusion]The daily variations in thermal stratification parameters reveal the formation,stabilization,and weakening phases of thermal stratification.Surface water temperature is identified as the main factor affecting thermal stratification.Additionally,climate warming may lead to more stable thermal stratification,extending the duration of stratification,changing DO concentration profiles and distributions,and causing other environmental issues.The findings provide scientific evidence for understanding the seasonal stratification and water chemistry characteristics of Nuozhadu Reservoir and the impacts of climate warming.The result are significant for reservoir water quality management and ecological environment protection.关键词
糯扎渡水库/热分层/热稳定性/溶解氧/气候变化Key words
Nuozhadu Reservoir/thermal stratification/thermal stability/dissolved oxygen/climate change分类
资源环境引用本文复制引用
亢建新,孙猛,包宇飞,王雨春,陈豪,李金洁,程瑶,吴兴华,温洁,李姗泽..糯扎渡水库季节性分层特征及气温变化影响[J].水利水电技术（中英文）,2025,56(10):111-123,13.基金项目
国家自然科学基金(52309107) （52309107）
云南省重点研发计划项目(202203AA080009) （202203AA080009）
中国长江三峡集团有限公司项目(201903144) （201903144）
国家重点研发计划(2023YFC3209401-02) （2023YFC3209401-02）
河北省自然科学基金(E2024402142) （E2024402142）
