生态与农村环境学报2018，Vol.34Issue(6)：521-527,7.DOI:10.11934/j.issn.1673-4831.2018.06.006
红水河龙滩水库夏季CO2分压分布特征及影响因素
Research of Distribution Characteristics and Influencing Factors of pCO2in Hong-shui River Longtan Reservoir in Summer.
摘要
Abstract
For studying the CO2emissions of Hongshui River Longtan Reservoir, the underway sampling was carried out to continuously survey the Longtan Reservoir of Hongshui River using a professional water sampler in July 2016. The partial pressure of CO2(pCO2) are calculated using the water-chemical balance and the Henry′s law. The results show that the da-ta of pCO2values on the surface water were divided into three intervals because the data of pCO2values on the surface from near the dam to the middle section ranged from 64. 28 to 152. 56 Pa, the transition zone of the middle section ranged from 161. 57 to 257. 57 Pa, as well as inflow waters ranged from 126. 45 to 264. 29 Pa, which was higher than that of pCO2be-fore the dam. There was a significant positive correlation on surface water pCO2with its TDS, Cond and ORP, and a signifi-cant negative correlation on surface water pCO2with pH, which suggests aquatic biosynthesis-respiration, carbonate karst sys-tem are important factors affecting the change of reservoir pCO2. Reservoir CO2flux had a increasing trend from the dam to the end of the tail reservoir with the mean value of the CO2flux being 45. 96 mmol·m-2·d-1and ranged from 9. 06 to 78. 80 mmol·m-2·d-1. Reservoir water showed an atmospheric CO2source with an obvious variation characteristics changing from weak carbon source before the dam to strong carbon source to the upstream, which implies the river type reservoir would slow down the carbon emission of river water.关键词
龙滩水库/CO2分压/CO2排放通量/相关分析Key words
Longtan Reservoir/partial pressure of carbon dioxide/the CO2emission flux/co-relationship analysis分类
资源环境引用本文复制引用
曹玉平,邓飞艳,焦树林,袁热林,张倩..红水河龙滩水库夏季CO2分压分布特征及影响因素[J].生态与农村环境学报,2018,34(6):521-527,7.基金项目
贵州省国内一流学科建设项目(黔教科研发[ 2017] 85号) （黔教科研发[ 2017] 85号）
国家自然科学基金(41263011) （41263011）
