Seasonal variations of terrestrial Dissolved Organic Carbon loading in response to rainfall events

摘要：

　　Dissolved organic carbon (DOC) loading from lands to rivers in response to rainfall events are the major carbon sources to aquatic ecosystem.We used high-resolution measurements to determine the runoff exports of DOC from the Chippewa River and watershed which was largely dominated by agricultural land-uses.It was found that DOC concentrations in spring were higher than in autumn and discharges in spring affected by snowmelt were larger and varied more widely than in autumn in this mixed watershed.We focused on the effect of antecedent 10-day rainfall on DOC variation and exports for the different magnitudes rainfall events.It showed that the antecedent precipitation (field moisture conditions) greatly determined the extent of DOC export.It was also shown that the DOC-Discharge distributions for storm-events were generally asymmetric,whereby they were positively skewed and it was greatly different between different seasons.

关键词： DOC Rainfall Agricultural land-uses Antecedent precipitation Different Seasons

作者: Qiao Huijiao Xu Jian Yan Jilin

作者单位: Jiangxi Normal University,330022 Nanchang Jiangxi,China;Central Michigan University,48858 Mt Pleasan Jiangxi Normal University,330022 Nanchang Jiangxi,China;Key Lab of Poyang Lake Wetland and Watershed

会议类型: 国际会议

会议名称: 2016 Internatioanl Conference on Engineering and Technology Innovations(ICETI-2016))2016年工程与技术创新国际会议

会议地点: 武汉

会议语种:英文

页码: 256-262

在线出版日期: 2016-03-25（万方平台首次上网日期，不代表论文的发表时间）