Estimation and comparison of nitrogen loads and attenuation in agricultural catchments of Japan and Korea.
Identifieur interne : 000A66 ( Main/Exploration ); précédent : 000A65; suivant : 000A67Estimation and comparison of nitrogen loads and attenuation in agricultural catchments of Japan and Korea.
Auteurs : S. Itahashi [Japon] ; M-C Seo ; M. TakeuchiSource :
- Water science and technology : a journal of the International Association on Water Pollution Research [ 0273-1223 ] ; 2007.
Descripteurs français
- Wicri :
- geographic : Japon.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Nitrogen, Water Pollutants, Chemical.
- geographic : Japan, Korea.
- chemistry : Rivers.
- Agriculture, Animals, Humans, Time Factors.
Abstract
To help in clarifying the relationship between the time lag and attenuation of nitrogen (N) loads generated in agricultural catchments, long-term trends in activities that generate N loads and in environmental N loads were estimated in catchments in Japan and Korea dominated by non-point-source emissions. Our approach used statistical data and geographical information system software to analyze pollutant loads. The method was successful in both countries because of the availability of well-developed statistics, geographical information, and weather and water quality monitoring systems, and the accumulation of research data concerning the generation of N loads and the fate of N in soils. Comparison of environmental loads with the loads observed in river water at the outlet of each catchment revealed that: (1) the effect of changes in the environmental load in a catchment appeared almost immediately in the river water quality in Korea, but did not appear clearly even 10 years later in Japan; and (2) the strength of the attenuation appeared to be much lower in Korea than in Japan. These findings suggest that regional characteristics play important roles in the sensitivity of water quality to load-generating activities.
PubMed: 17711005
Affiliations:
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Le document en format XML
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Itahashi</name><affiliation wicri:level="1"><nlm:affiliation>National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, 305-8604, Japan. sunaita@niaes.affrc.go.jp</nlm:affiliation><country xml:lang="fr">Japon</country><wicri:regionArea>National Institute for Agro-Environmental Sciences, 3-1-3 Kannondai, Tsukuba, 305-8604</wicri:regionArea><wicri:noRegion>305-8604</wicri:noRegion></affiliation></author><author><name sortKey="Seo, M C" sort="Seo, M C" uniqKey="Seo M" first="M-C" last="Seo">M-C Seo</name></author><author><name sortKey="Takeuchi, M" sort="Takeuchi, M" uniqKey="Takeuchi M" first="M" last="Takeuchi">M. Takeuchi</name></author></analytic><series><title level="j">Water science and technology : a journal of the International Association on Water Pollution Research</title><idno type="ISSN">0273-1223</idno><imprint><date when="2007" type="published">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Agriculture</term><term>Animals</term><term>Humans</term><term>Japan</term><term>Korea</term><term>Nitrogen (analysis)</term><term>Rivers (chemistry)</term><term>Time Factors</term><term>Water Pollutants, Chemical (analysis)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Nitrogen</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Japan</term><term>Korea</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Rivers</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Agriculture</term><term>Animals</term><term>Humans</term><term>Time Factors</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Japon</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">To help in clarifying the relationship between the time lag and attenuation of nitrogen (N) loads generated in agricultural catchments, long-term trends in activities that generate N loads and in environmental N loads were estimated in catchments in Japan and Korea dominated by non-point-source emissions. Our approach used statistical data and geographical information system software to analyze pollutant loads. The method was successful in both countries because of the availability of well-developed statistics, geographical information, and weather and water quality monitoring systems, and the accumulation of research data concerning the generation of N loads and the fate of N in soils. Comparison of environmental loads with the loads observed in river water at the outlet of each catchment revealed that: (1) the effect of changes in the environmental load in a catchment appeared almost immediately in the river water quality in Korea, but did not appear clearly even 10 years later in Japan; and (2) the strength of the attenuation appeared to be much lower in Korea than in Japan. These findings suggest that regional characteristics play important roles in the sensitivity of water quality to load-generating activities.</div></front></TEI><affiliations><list><country><li>Japon</li></country></list><tree><noCountry><name sortKey="Seo, M C" sort="Seo, M C" uniqKey="Seo M" first="M-C" last="Seo">M-C Seo</name><name sortKey="Takeuchi, M" sort="Takeuchi, M" uniqKey="Takeuchi M" first="M" last="Takeuchi">M. Takeuchi</name></noCountry><country name="Japon"><noRegion><name sortKey="Itahashi, S" sort="Itahashi, S" uniqKey="Itahashi S" first="S" last="Itahashi">S. Itahashi</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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