Hydrogeomorphic controls on reduction-oxidation conditions across boreal upland-wetland interfaces

详细信息    Hydrogeomorphic controls on reduction-oxidation conditions across boreal upland-wetland interfaces

• 出版日期：2002.
• 页数：82 p. :
• 第一责任说明：Carl Peter John Mitchell.
• 分类号：a224 ; a223 ; a222
• ISBN：0612739775(ebk.) :

MARC全文

02h0026394 20111128142921.0 cr un||||||||| 111128s2002 xx ||||f|||d||||||||eng | AAIMQ73977 0612739775(ebk.) : CNY371.35 NGL NGL NGL a224 ; a223 ; a222 Mitchell, Carl Peter John. Hydrogeomorphic controls on reduction-oxidation conditions across boreal upland-wetland interfaces [electronic resource] / Carl Peter John Mitchell. 2002. 82 p. : digital, PDF file. Source: Masters Abstracts International, Volume: 41-03, page: 0751. ; Adviser: Brian Branfireun. Thesis (M.Sc.)--University of Toronto (Canada), 2002. Includes bibliographical references. This study is presented as two separate papers in order to (1) examine the spatiotemporal dynamics of the redox state of groundwater along upland-wetland transitions of different geomorphic settings and (2) to assess how fluctuations in water table affect wetland redox conditions. It was found that geomorphic setting and its subsequent control on hydrology resulted in high amounts of spatial variability in redox chemistry across the upland-wetland interface and that event-driven lateral groundwater flow from the surrounding uplands was the primary temporal control on changes in both redox chemistry and in situ redox potential. Decreases in water table elevation for longer durations resulted in large, short-term increases in sulfate concentration as a result of sulfide re-oxidation after the water table was increased. Geomorphology. ; Wetland hydrology. ; Hydrology. ; Wetlands. Electronic books. aeBook. aCN bNGL http://proquest.calis.edu.cn/umi/detail_usmark.jsp?searchword=pub_number%3DAAIMQ73977&singlesearch=no&channelid=%CF%B8%C0%C0&record=1 NGL Bs1097 rCNY371.35 ; h1 bs1108