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Article: Nitrogen source apportionment of the East River (Dongjiang), China

TitleNitrogen source apportionment of the East River (Dongjiang), China
Authors
Issue Date2009
PublisherRoutledge. The Journal's web site is located at http://www.tandf.co.uk/journals/RAGE
Citation
Asian Geographer, 2009, v. 26 n. 1-2, p. 95-110 How to Cite?
AbstractThe East River, locally known as Dongjiang, is the major source of potable water supply for Hong Kong. Because of the rapid economic development in the basin, concerns have been raised regarding the water quality in the river. In this study, total nitrogen (TN) export from the basin in 1998 is estimated for various sources based on a simple correlative approach utilizing measured concentrations in the river, together with some mass balance constraints based on socio-economic data. A modeling tool, HSP-F, is used for discharge calculation. The export coefficients for four land-use classes are calibrated and compared with literature. It is found that municipal input together with the contribution from farm animals are the major sources of nitrogen in the basin. A total load of 113, 000 t N/a has been estimated, giving an average specific export coefficient of 41.5 kg/ha/a, of which 68% are from non-point sources from the urban land-use and 17% from farm animals. The spatial distribution of nitrogen provenance is highly uneven and is concentrated in the downstream areas near Huizhou, Dongguan and Shenzhen.
Persistent Identifierhttp://hdl.handle.net/10722/191220
ISSN

 

DC FieldValueLanguage
dc.contributor.authorFok, L-
dc.contributor.authorThoe, W-
dc.contributor.authorKoenig, A-
dc.contributor.authorPeart, MR-
dc.contributor.authorLee, JHW-
dc.date.accessioned2013-10-08T06:29:30Z-
dc.date.available2013-10-08T06:29:30Z-
dc.date.issued2009-
dc.identifier.citationAsian Geographer, 2009, v. 26 n. 1-2, p. 95-110-
dc.identifier.issn1022-5706-
dc.identifier.urihttp://hdl.handle.net/10722/191220-
dc.description.abstractThe East River, locally known as Dongjiang, is the major source of potable water supply for Hong Kong. Because of the rapid economic development in the basin, concerns have been raised regarding the water quality in the river. In this study, total nitrogen (TN) export from the basin in 1998 is estimated for various sources based on a simple correlative approach utilizing measured concentrations in the river, together with some mass balance constraints based on socio-economic data. A modeling tool, HSP-F, is used for discharge calculation. The export coefficients for four land-use classes are calibrated and compared with literature. It is found that municipal input together with the contribution from farm animals are the major sources of nitrogen in the basin. A total load of 113, 000 t N/a has been estimated, giving an average specific export coefficient of 41.5 kg/ha/a, of which 68% are from non-point sources from the urban land-use and 17% from farm animals. The spatial distribution of nitrogen provenance is highly uneven and is concentrated in the downstream areas near Huizhou, Dongguan and Shenzhen.-
dc.languageeng-
dc.publisherRoutledge. The Journal's web site is located at http://www.tandf.co.uk/journals/RAGE-
dc.relation.ispartofAsian Geographer-
dc.rightsPREPRINT This is a preprint of an article whose final and definitive form has been published in the [JOURNAL TITLE] [year of publication] [copyright Taylor & Francis]; [JOURNAL TITLE] is available online at: http://www.informaworld.com/smpp/ with the open URL of your article POSTPRINT ‘This is an electronic version of an article published in [include the complete citation information for the final version of the article as published in the print edition of the journal]. [JOURNAL TITLE] is available online at: http://www.informaworld.com/smpp/ with the open URL of your article.-
dc.titleNitrogen source apportionment of the East River (Dongjiang), Chinaen_US
dc.typeArticleen_US
dc.identifier.emailKoenig, A: kalbert@hkucc.hku.hk-
dc.identifier.emailPeart, MR: mrpeart@hkucc.hku.hk-
dc.identifier.emailLee, JHW: hreclhw@hku.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1080/10225706.2009.9684146-
dc.identifier.volume26-
dc.identifier.issue1-2-
dc.identifier.spage95-
dc.identifier.epage110-
dc.publisher.placeUnited Kingdom-

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