华东师范大学学报（自然科学版）Issue(3)：1-16,16.DOI:10.3969/j.issn.1000-5641.2026.03.001
南盘江—红水河流域梯级水库二氧化碳和甲烷的时空特征
Spatiotemporal characteristics of carbon dioxide and methane in cascade reservoirs in the Nanpanjiang-Hongshui River Basin
摘要
Abstract
In order to understand the spatiotemporal characteristics and key regulatory factors of greenhouse gas emissions from karst cascade reservoirs,four dammed reservoirs with different hydrological regulation characteristics in the Nanpanjiang-Hongshui River Basin were studied.The results show significant regional characteristics of the carbon dioxide(CO2)and methane(CH4)concentrations and emission fluxes from the reservoirs.The diffusive fluxes of CO2 and CH4 in the watershed were 4.98～260.11 mmol·m-2·d-1 and 0.01～0.27 mmol·m-2·d-1,respectively,of which the CO2 fluxes were higher than the average level of reservoirs in China.Estimation of the greenhouse gas emissions from the reservoirs indicated that the total greenhouse gas emissions of the basin system have clear spatial differences.Hydraulic load is the key factor regulating the greenhouse gas emission of karst dammed rivers in the Nanpanjiang-Hongshui River Basin.The CO2 emission flux of reservoirs was found to decrease first and then increase with the increase of hydraulic load,and there is a correlation between hydraulic load and methane concentration in the reservoirs.This study is of great significance for a comprehensive understanding of the greenhouse gas emission law and control mechanism of karst dammed rivers and can provide theoretical support and data reference for carbon emission assessment as well as carbon reduction in the karst reservoirs.关键词
喀斯特流域/梯级水库/二氧化碳/甲烷/水力负荷Key words
karst basin/cascade reservoir/carbon dioxide/methane/hydraulic load分类
资源环境引用本文复制引用
杨荣荣,陈子彦,吴仪,侯立军,梁霞..南盘江—红水河流域梯级水库二氧化碳和甲烷的时空特征[J].华东师范大学学报（自然科学版）,2026,(3):1-16,16.基金项目
国家自然科学基金重点项目(42030411) （42030411）
