Groyne fields - Sink and source functions of "flow-reduced zones" for water content in the River Elbe (Germany)
The role of man-made "flow-reduced zones" as a sink or a source of water content is unknown for the River Elbe, Germany. We measured and compared: a) the concentration of suspended matter at the inflow and the outflow of one special groyne field ("UFZ groyne field") weekly for a...
Saved in:
Published in | Water science and technology Vol. 45; no. 6; pp. 17 - 24 |
---|---|
Main Authors | , |
Format | Journal Article |
Language | English |
Published |
06.03.2002
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Abstract | The role of man-made "flow-reduced zones" as a sink or a source of water content is unknown for the River Elbe, Germany. We measured and compared: a) the concentration of suspended matter at the inflow and the outflow of one special groyne field ("UFZ groyne field") weekly for a period of two years; and b) the intensity of oxygen metabolism within several groyne fields and the main stream during a Lagrangian survey. Under discharge conditions near or below mean water, we found a significant reduction of suspended particulate matter and particle bound nutrients in the "UFZ groyne field". In contrast, concentrations of most soluble water contents and chlorophyll a did not significantly change between in- and outflow. During the Lagrangian survey, pelagic production and respiration rates developed nearly identically in both the main stream and the adjacent groyne fields but oxygen time curves showed higher amplitudes for the groyne fields compared to the river. This higher net-oxygen production in the groyne fields is due to reduced water depth and reduced stream velocity. It enhances the concentration of oxygen in the main stream. The contrary results show the coexistence of both sink and source functions of "flow-reduced zones" in rivers. |
---|---|
AbstractList | The role of man-made "flow-reduced zones" as a sink or a source of water content is unknown for the River Elbe, Germany. We measured and compared: a) the concentration of suspended matter at the inflow and the outflow of one special groyne field ("UFZ groyne field") weekly for a period of two years; and b) the intensity of oxygen metabolism within several groyne fields and the main stream during a Lagrangian survey. Under discharge conditions near or below mean water, we found a significant reduction of suspended particulate matter and particle bound nutrients in the "UFZ groyne field". In contrast, concentrations of most soluble water contents and chlorophyll a did not significantly change between in- and outflow. During the Lagrangian survey, pelagic production and respiration rates developed nearly identically in both the main stream and the adjacent groyne fields but oxygen time curves showed higher amplitudes for the groyne fields compared to the river. This higher net-oxygen production in the groyne fields is due to reduced water depth and reduced stream velocity. It enhances the concentration of oxygen in the main stream. The contrary results show the coexistence of both sink and source functions of "flow-reduced zones" in rivers. |
Author | Guhr, H Ockenfeld, K |
Author_xml | – sequence: 1 givenname: K surname: Ockenfeld fullname: Ockenfeld, K – sequence: 2 givenname: H surname: Guhr fullname: Guhr, H |
BookMark | eNqNjcFKAzEURQO2YMf6D48uRBcDmWS0zlpqXVf3JWZeMJq-p3mJpX69s_ADXF0458Bt1IyY8Ew13X1v7dDfmmGmFtqsbdsZY89VI_KutV7bXi8UbzOfCCFETKNAC8-RPsDRCMI1-0lU8iUyCXCAVUh8bDOO1eMIP9OPrCBwhqMrmMEzFaQCkaC8Iezi9wQ36RXheov54Oh0s1Tz4JLg5d9eqKvHzcvDU_uZ-auilP0hiseUHCFX2XeDHe6M0fbf4S-8I09P |
ContentType | Journal Article |
DBID | 7QH 7TV 7UA C1K F1W H96 L.G |
DatabaseName | Aqualine Pollution Abstracts Water Resources Abstracts Environmental Sciences and Pollution Management ASFA: Aquatic Sciences and Fisheries Abstracts Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources Aquatic Science & Fisheries Abstracts (ASFA) Professional |
DatabaseTitle | Aquatic Science & Fisheries Abstracts (ASFA) Professional Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources ASFA: Aquatic Sciences and Fisheries Abstracts Pollution Abstracts Aqualine Water Resources Abstracts Environmental Sciences and Pollution Management |
DatabaseTitleList | Aquatic Science & Fisheries Abstracts (ASFA) Professional |
DeliveryMethod | fulltext_linktorsrc |
Discipline | Engineering Environmental Sciences |
Editor | Greenfield, P Ward, S (eds) |
Editor_xml | – fullname: Ward, S (eds) – fullname: Greenfield, P |
EndPage | 24 |
GeographicLocations | Germany |
GeographicLocations_xml | – name: Germany |
GroupedDBID | --- -~X 0R~ 123 3V. 4.4 53G 7QH 7TV 7UA 7X7 88E 8CJ 8FE 8FG 8FH 8FI 8FJ ABFYC ABJCF ABUWG ABYZJ ACGFO ACIWK AECGI AENEX AFKRA AFRAH AGVJA AJXRC ALIPV ALMA_UNASSIGNED_HOLDINGS BENPR BGLVJ BHPHI BKSAR BPHCQ BVXVI C1K CCPQU CS3 D1J DU5 F1W F5P FDB FYUFA GEUZO GROUPED_DOAJ H13 H96 HCIFZ HFPTO HMCUK HZ~ L.G L6V L7B M1P M7S O9- OK1 P2P PCBAR PQQKQ PROAC PSQYO PTHSS R0Z RHI RHY RIG SJN TN5 UAO UHS UKHRP Y6R ~02 ~KM |
ID | FETCH-proquest_miscellaneous_193962203 |
ISBN | 1843394529 9781843394525 |
ISSN | 0273-1223 |
IngestDate | Fri Aug 16 21:49:02 EDT 2024 |
IsPeerReviewed | true |
IsScholarly | true |
Issue | 6 |
Language | English |
LinkModel | OpenURL |
MergedId | FETCHMERGED-proquest_miscellaneous_193962203 |
Notes | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Conference-1 ObjectType-Feature-3 content type line 23 |
PQID | 19396220 |
PQPubID | 23462 |
ParticipantIDs | proquest_miscellaneous_19396220 |
PublicationCentury | 2000 |
PublicationDate | 20020306 |
PublicationDateYYYYMMDD | 2002-03-06 |
PublicationDate_xml | – month: 03 year: 2002 text: 20020306 day: 06 |
PublicationDecade | 2000 |
PublicationTitle | Water science and technology |
PublicationYear | 2002 |
SSID | ssj0007340 |
Score | 3.351705 |
Snippet | The role of man-made "flow-reduced zones" as a sink or a source of water content is unknown for the River Elbe, Germany. We measured and compared: a) the... |
SourceID | proquest |
SourceType | Aggregation Database |
StartPage | 17 |
SubjectTerms | Freshwater Germany, Elbe R |
Title | Groyne fields - Sink and source functions of "flow-reduced zones" for water content in the River Elbe (Germany) |
URI | https://search.proquest.com/docview/19396220 |
Volume | 45 |
hasFullText | 1 |
inHoldings | 1 |
isFullTextHit | |
isPrint | |
link | http://utb.summon.serialssolutions.com/2.0.0/link/0/eLvHCXMwnZ3LS8NAEMYXqxc9iFaLzzqIihIidpNsmqNKWhFtpbbQW2naBBVJoA_E_vXO7G6SioKPS2hDmj5-6ezs5PtmGTuq4r_IHeA0tcqt0LR5MDA9UQ1NEVWGnnDF0OPkd75viJuOfdt1uvmqa9JdMgnOB7NvfSX_oYr7kCu5ZP9ANjsp7sDHyBe3SBi3v2JcHyXvmCRKFdrYMI1HnFgaqhJOJXmDBq1M6XbMefSavJkjataKaeZMdennUmj41qdmiaRbJ22A1j62SLNh-K-BzEPrFMPj97R08JIuH0MvTM1BUo75pVjfxEgRR3op7KysWp8-jXJ3RFp44FJ5JfL5J60UY3l043YuZmE2ZFa4shCnAVb1i9QX0ny0VK5NPe4qK_XnjtiNZq_Wubvrtf1uu8AKVoVEm9VaPRtrXctWVTT9tqpJgP5YuqNX-tz5MtzKHKK9xlZ18g-XiuQ6WwjjIluZawlZZCU_dx7ioTr0jjdYomCDgg0mEGzAHxwUbMhgQxLB4TxqkKgPAUGDBA0aNDzHgKBBggYCDaca89kmO6n57esbM_0yPYwIdJunH4fJdNzDlNwTnF9YJbYY4_m3GNgVexg6USgCzJgjh_fFMLICJwy8iFvCcbfZwQ8n2_nxiF22nF8le2xxMpqG-5iwTYIyK7hdtyzJldnSld94aH0A5q9KaA |
link.rule.ids | 315,786,790,31753,33407,33778 |
linkProvider | ProQuest |
openUrl | ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=Groyne+fields+-+Sink+and+source+functions+of+%22flow-reduced+zones%22+for+water+content+in+the+River+Elbe+%28Germany%29&rft.jtitle=Water+science+and+technology&rft.au=Ockenfeld%2C+K&rft.au=Guhr%2C+H&rft.date=2002-03-06&rft.isbn=1843394529&rft.issn=0273-1223&rft.volume=45&rft.issue=6&rft.spage=17&rft.epage=24&rft.externalDBID=NO_FULL_TEXT |
thumbnail_l | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/lc.gif&issn=0273-1223&client=summon |
thumbnail_m | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/mc.gif&issn=0273-1223&client=summon |
thumbnail_s | http://covers-cdn.summon.serialssolutions.com/index.aspx?isbn=/sc.gif&issn=0273-1223&client=summon |