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Relationship between the riverine nitrate-nitrogen concentration and the land use in the Teshio River watershed, North Japan

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Title: Relationship between the riverine nitrate-nitrogen concentration and the land use in the Teshio River watershed, North Japan
Authors: Ileva, Nina Y. Browse this author
Shibata, Hideaki Browse this author →KAKEN DB
Satoh, Fuyuki Browse this author →KAKEN DB
Sasa, Kaichiro Browse this author →KAKEN DB
Ueda, Hiroshi Browse this author →KAKEN DB
Keywords: GIS
NO3-N
Land use
Teshio basin
Ecosystem services
Issue Date: Oct-2009
Publisher: Springer Japan
Journal Title: Sustainability Science
Volume: 4
Issue: 2
Start Page: 189
End Page: 198
Publisher DOI: 10.1007/s11625-009-0081-5
Abstract: The present research investigated the relationship between nitrate-nitrogen (NO3-N) in river water and the land use/land cover (hereafter, land use) in the Teshio River watershed located in northern Hokkaido island to understand the effect of human activities such as agriculture, forestry, industry, and urbanization in the drainage basin on the river ecosystem quality and services. River water was sampled at nine points seasonally during a two-year period and the nutrients concentration was measured. Land use profiles were estimated at two spatial scales-riparian and sub-catchment for each sampling station. The spatial pattern of water quality in the Teshio River showed increased NO3-N levels associated with agriculture and urban expansion, and forest reduction in the watershed. Land use at the riparian scale closely reflected that at the sub-catchment scale, which masked the unique riparian buffer effect on the river water condition. The high agricultural and reduced forest area in the riparian zone, especially in the upper middle reach, could be a possible reason for a decline of ecosystem service for the provisioning of clean water and habitat for aquatic organisms. Measures towards sustainable and more nature-friendly agricultural management are necessary in the area to protect the Teshio River ecosystem and its ecosystem services.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/39668
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 上田 宏

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