Analysis of Recent Nutrient Emission Pathways, Resulting Surface Water Quality and Ecological Impacts under Extreme Continental Climate: The Kharaa River Basin (Mongolia)
Identifieur interne : 001274 ( Istex/Corpus ); précédent : 001273; suivant : 001275Analysis of Recent Nutrient Emission Pathways, Resulting Surface Water Quality and Ecological Impacts under Extreme Continental Climate: The Kharaa River Basin (Mongolia)
Auteurs : Jürgen Hofmann ; Jens Hürdler ; Ralf Ibisch ; Michael Schaeffer ; Dietrich BorchardtSource :
- International Review of Hydrobiology [ 1434-2944 ] ; 2011-11.
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- KwdEn :
Abstract
This paper presents primary research results on nutrient emissions, resulting water quality and ecological impacts of the Kharaa river basin (Mongolia) during a three‐year water resource management study. Based on surveillance data from Mongolian environmental authorities and a complementary own monitoring scheme we calculated nutrient emissions on a sub‐basin scale. Additionally, the ecological situation of fish fauna, macroinvertebrates and their habitats were investigated on selected river sections in order to link anthropogenic pressures, nutrient status and ecological impact. Although the headwaters of the Kharaa represent natural background conditions (total nitrogen (TN) 0.46 to 0.58 mg N L–1, total phosphorus (TP) 0.011 to 0.018 mg P L–1) and population densities within the catchment are very low (< 10 inhabitants km–2), the river basin is facing relatively high anthropogenic pressures on water quality in the middle and especially in the lower reaches (total nitrogen 1.50 to 1.52 mg N L–1, total phosphorus 0.18 to 0.26 mg P L–1). Nitrogen emissions into the Kharaa river basin were about 301 t N yr–1 for the time period 2006–2008. For phosphorus a total emission of 56 t P yr–1 was estimated. Main contributors are urban settlements with a high proportion of households without connection to wastewater treatment plants and, to a lesser extent, agricultural land‐use. These nutrient levels have a significant eutrophication potential in the Kharaa River and we observed functional shifts of the macroinvertebrates and fish fauna, while the drinking water abstraction through bank filtration showed no significant alteration of raw water quality. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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DOI: 10.1002/iroh.201111294
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ISTEX:A4C424BEE64615259B6EDBE633FF0AF580F19551Le document en format XML
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Based on surveillance data from Mongolian environmental authorities and a complementary own monitoring scheme we calculated nutrient emissions on a sub‐basin scale. Additionally, the ecological situation of fish fauna, macroinvertebrates and their habitats were investigated on selected river sections in order to link anthropogenic pressures, nutrient status and ecological impact. Although the headwaters of the Kharaa represent natural background conditions (total nitrogen (TN) 0.46 to 0.58 mg N L–1, total phosphorus (TP) 0.011 to 0.018 mg P L–1) and population densities within the catchment are very low (< 10 inhabitants km–2), the river basin is facing relatively high anthropogenic pressures on water quality in the middle and especially in the lower reaches (total nitrogen 1.50 to 1.52 mg N L–1, total phosphorus 0.18 to 0.26 mg P L–1). Nitrogen emissions into the Kharaa river basin were about 301 t N yr–1 for the time period 2006–2008. For phosphorus a total emission of 56 t P yr–1 was estimated. Main contributors are urban settlements with a high proportion of households without connection to wastewater treatment plants and, to a lesser extent, agricultural land‐use. These nutrient levels have a significant eutrophication potential in the Kharaa River and we observed functional shifts of the macroinvertebrates and fish fauna, while the drinking water abstraction through bank filtration showed no significant alteration of raw water quality. (© 2011 WILEY‐VCH Verlag GmbH & Co. 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Based on surveillance data from Mongolian environmental authorities and a complementary own monitoring scheme we calculated nutrient emissions on a sub‐basin scale. Additionally, the ecological situation of fish fauna, macroinvertebrates and their habitats were investigated on selected river sections in order to link anthropogenic pressures, nutrient status and ecological impact.</p><p>Although the headwaters of the Kharaa represent natural background conditions (total nitrogen (TN) 0.46 to 0.58 mg N L<sup>–1</sup>, total phosphorus (TP) 0.011 to 0.018 mg P L<sup>–1</sup>) and population densities within the catchment are very low (< 10 inhabitants km<sup>–2</sup>), the river basin is facing relatively high anthropogenic pressures on water quality in the middle and especially in the lower reaches (total nitrogen 1.50 to 1.52 mg N L<sup>–1</sup>, total phosphorus 0.18 to 0.26 mg P L<sup>–1</sup>). Nitrogen emissions into the Kharaa river basin were about 301 t N yr<sup>–1</sup> for the time period 2006–2008. For phosphorus a total emission of 56 t P yr<sup>–1</sup> was estimated. Main contributors are urban settlements with a high proportion of households without connection to wastewater treatment plants and, to a lesser extent, agricultural land‐use. These nutrient levels have a significant eutrophication potential in the Kharaa River and we observed functional shifts of the macroinvertebrates and fish fauna, while the drinking water abstraction through bank filtration showed no significant alteration of raw water quality. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Analysis of Recent Nutrient Emission Pathways, Resulting Surface Water Quality and Ecological Impacts under Extreme Continental Climate: The Kharaa River Basin (Mongolia)</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Analysis of Recent Nutrient Emission Pathways, Resulting Surface Water Quality and Ecological Impacts under Extreme Continental Climate: The Kharaa River Basin (Mongolia)</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Analysis of Recent Nutrient Emission Pathways, Resulting Surface Water Quality and Ecological Impacts under Extreme Continental Climate: The Kharaa River Basin (Mongolia)</title></titleInfo><name type="personal"><namePart type="given">Jürgen</namePart><namePart type="family">Hofmann</namePart><affiliation>Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Department of Limnology of Shallow Lakes and Lowland Rivers, Müggelseedamm 310, D‐12587 Berlin, Germany</affiliation><description>Correspondence: Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Department of Limnology of Shallow Lakes and Lowland Rivers, Müggelseedamm 310, D‐12587 Berlin, Germany</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jens</namePart><namePart type="family">Hürdler</namePart><affiliation>Leibniz‐Institute of Freshwater Ecology and Inland Fisheries, Department of Limnology of Shallow Lakes and Lowland Rivers, Müggelseedamm 310, D‐12587 Berlin, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ralf</namePart><namePart type="family">Ibisch</namePart><affiliation>Helmholtz Centre for Environmental Research‐UFZ, Department Aquatic Ecosystems Analysis and Management, Brückstr. 3a, D‐39144 Magdeburg, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Michael</namePart><namePart type="family">Schaeffer</namePart><affiliation>Helmholtz Centre for Environmental Research‐UFZ, Department Aquatic Ecosystems Analysis and Management, Brückstr. 3a, D‐39144 Magdeburg, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Dietrich</namePart><namePart type="family">Borchardt</namePart><affiliation>Helmholtz Centre for Environmental Research‐UFZ, Department Aquatic Ecosystems Analysis and Management, Brückstr. 3a, D‐39144 Magdeburg, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article">article</genre><originInfo><publisher>WILEY‐VCH Verlag</publisher><place><placeTerm type="text">Weinheim</placeTerm></place><dateIssued encoding="w3cdtf">2011-11</dateIssued><dateCaptured encoding="w3cdtf">2011-04-01</dateCaptured><dateValid encoding="w3cdtf">2011-08-19</dateValid><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">9</extent><extent unit="tables">9</extent><extent unit="references">75</extent></physicalDescription><abstract lang="en">This paper presents primary research results on nutrient emissions, resulting water quality and ecological impacts of the Kharaa river basin (Mongolia) during a three‐year water resource management study. Based on surveillance data from Mongolian environmental authorities and a complementary own monitoring scheme we calculated nutrient emissions on a sub‐basin scale. Additionally, the ecological situation of fish fauna, macroinvertebrates and their habitats were investigated on selected river sections in order to link anthropogenic pressures, nutrient status and ecological impact. Although the headwaters of the Kharaa represent natural background conditions (total nitrogen (TN) 0.46 to 0.58 mg N L–1, total phosphorus (TP) 0.011 to 0.018 mg P L–1) and population densities within the catchment are very low (< 10 inhabitants km–2), the river basin is facing relatively high anthropogenic pressures on water quality in the middle and especially in the lower reaches (total nitrogen 1.50 to 1.52 mg N L–1, total phosphorus 0.18 to 0.26 mg P L–1). Nitrogen emissions into the Kharaa river basin were about 301 t N yr–1 for the time period 2006–2008. For phosphorus a total emission of 56 t P yr–1 was estimated. Main contributors are urban settlements with a high proportion of households without connection to wastewater treatment plants and, to a lesser extent, agricultural land‐use. These nutrient levels have a significant eutrophication potential in the Kharaa River and we observed functional shifts of the macroinvertebrates and fish fauna, while the drinking water abstraction through bank filtration showed no significant alteration of raw water quality. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)</abstract><note type="funding">Weather and Forecast Monitoring Department in Darkhan</note><note type="funding">Water Authority Ulaanbaatar, Mongolia</note><note type="funding">National Agency for Hydrology, Meteorology and Environmental Monitoring (NAMHEM)</note><note type="funding">German Ministry of Education and Research (BMBF project No. 03300762)</note><subject lang="en"><genre>Keywords</genre><topic>phosphorus</topic><topic>nitrogen</topic><topic>monitoring</topic><topic>river basin management</topic><topic>biomonitoring</topic></subject><relatedItem type="host"><titleInfo><title>International Review of Hydrobiology</title></titleInfo><titleInfo type="abbreviated"><title>International Review of Hydrobiology</title></titleInfo><subject><genre>article category</genre><topic>Research Paper</topic></subject><identifier type="ISSN">1434-2944</identifier><identifier type="eISSN">1522-2632</identifier><identifier type="DOI">10.1002/(ISSN)1522-2632</identifier><identifier type="PublisherID">IROH</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>96</number></detail><detail type="issue"><caption>no.</caption><number>5</number></detail><extent unit="pages"><start>484</start><end>519</end><total>36</total></extent></part></relatedItem><identifier type="istex">A4C424BEE64615259B6EDBE633FF0AF580F19551</identifier><identifier type="DOI">10.1002/iroh.201111294</identifier><identifier type="ArticleID">IROH201111294</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2011 WILEY‐VCH Verlag GmbH & Co. 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