Characterization of dissolved organic matter (DOM) in an urbanized watershed using spectroscopic ana

删除或更新信息，请邮件至freekaoyan#163.com(#换成@)

本站小编 Free考研考试/2021-12-12

论文编号:
论文题目:	Characterization of dissolved organic matter (DOM) in an urbanized watershed using spectroscopic analysis
英文论文题目:	Characterization of dissolved organic matter (DOM) in an urbanized watershed using spectroscopic analysis
第一作者:	吕丽丽
英文第一作者:	lvlili
联系作者:	宋开山
英文联系作者:	songkaishan
外单位作者单位:
英文外单位作者单位:
发表年度:	2021
卷:	277
期:
页码:	130210-130210
摘要:	Landscape urbanization broadly alter watersheds ecosystems, yet the impact of nonpoint source urban inputs on dissolved organic matter (DOM) amount, composition and source is poorly understood. To systematically examine how DOM optical index and composition varied with urbanization, a unique long term observation dataset (4 years) of fluorescence excitation emission matrices (EEMs) was collected from two types of waters: urban waters and non-urban waters. Two humic-like DOM fluorescent components (C1 and C2) and one protein-like component (C3) were identified by parallel factor analysis (PARAFAC), and the results indicated that urbanization had an important influence on DOM concentration and composition, with urban waters having a high degree of DOM variation due to different land use surrounding each body of water. Urban waters presented higher DOM content, CDOM absorption and DOM fluorescence intensity (FI), a greater proportion of protein-like (26%>21.3%), and less proportion of humic-like (51.9%<57.6%) than non-urban waters, were dominated by allochthonous inputs. Moreover, the long-term observation of the urbanized DOM's dynamics was conducted on monthly, seasonal and yearly timescales. The results reflected the response of DOM to regional climate. Higher DOM amount and FI appeared in the summer due to autochthonous production comes from algae growth and allochthonous input comes from rainfall. It also revealed that continuous increase in impervious artificial surfaces caused by urban expansion, contributed to the increase in DOM quantity and drove DOM composition to be more protein-like. Consequently, these findings filled the knowledge gap of the mechanism of land-water interaction on DOM properties in freshwater ecosystems.
英文摘要:	Landscape urbanization broadly alter watersheds ecosystems, yet the impact of nonpoint source urban inputs on dissolved organic matter (DOM) amount, composition and source is poorly understood. To systematically examine how DOM optical index and composition varied with urbanization, a unique long term observation dataset (4 years) of fluorescence excitation emission matrices (EEMs) was collected from two types of waters: urban waters and non-urban waters. Two humic-like DOM fluorescent components (C1 and C2) and one protein-like component (C3) were identified by parallel factor analysis (PARAFAC), and the results indicated that urbanization had an important influence on DOM concentration and composition, with urban waters having a high degree of DOM variation due to different land use surrounding each body of water. Urban waters presented higher DOM content, CDOM absorption and DOM fluorescence intensity (FI), a greater proportion of protein-like (26%>21.3%), and less proportion of humic-like (51.9%<57.6%) than non-urban waters, were dominated by allochthonous inputs. Moreover, the long-term observation of the urbanized DOM's dynamics was conducted on monthly, seasonal and yearly timescales. The results reflected the response of DOM to regional climate. Higher DOM amount and FI appeared in the summer due to autochthonous production comes from algae growth and allochthonous input comes from rainfall. It also revealed that continuous increase in impervious artificial surfaces caused by urban expansion, contributed to the increase in DOM quantity and drove DOM composition to be more protein-like. Consequently, these findings filled the knowledge gap of the mechanism of land-water interaction on DOM properties in freshwater ecosystems.
刊物名称:	Chemosphere
英文刊物名称:	Chemosphere
论文全文:
英文论文全文:
全文链接:
其它备注:
英文其它备注:
学科:
英文学科:
影响因子:
第一作者所在部门:
英文第一作者所在部门:
论文出处:
英文论文出处:
论文类别:
英文论文类别:
参与作者:	L. Lyu, G. Liu, Y. Shang, Z. Wen, J. Hou and K. Song
英文参与作者:	L. Lyu, G. Liu, Y. Shang, Z. Wen, J. Hou and K. Song

Characterization of dissolved organic matter (DOM) in an urbanized watershed using spectroscopic ana

本站小编 Free考研考试/2021-12-12

相关话题/

领限时大额优惠券,享本站正版考研考试资料!