Threat of pollution hotspots reworking in river systems: Example of the Ploučnice River (Czech Republic)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F18%3A43894152" target="_blank" >RIV/44555601:13520/18:43894152 - isvavai.cz</a>

Výsledek na webu

<a href="http://gisak.vsb.cz/GIS_Ostrava/GIS_Ova_2018/proceedings/proceedings.pdf" target="_blank" >http://gisak.vsb.cz/GIS_Ostrava/GIS_Ova_2018/proceedings/proceedings.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Threat of pollution hotspots reworking in river systems: Example of the Ploučnice River (Czech Republic)

Popis výsledku v původním jazyce

Mapping and evaluation of historically polluted fluvial sediments is an urgent topic as they may endanger quality of water and solids transported by rivers and thus impact biota including humans. The polluted sediment reworking may be triggered by floods and sometimes also by river engineering or revitalisation. A combination of diverse methods including geoinformatics allows pollution hotspots identification in floodplains and evaluation of their potential for their future reworking. The Ploučnice River and its floodplain were polluted by local uranium mining (U-mining) in 1971-1989. This river has been studied since 2013 in aim to identify the relationship between the floodplain geomorphology and the spatial distribution of pollutants. Archive information on pollution history and past floods, old maps and aerial photographs, and older low-resolution gamma activity aerial survey were collected to understand the floodplain development and pollution heterogeneity. Afterwards, digital terrain model based on publically available LiDAR data (airborne laser scanning) was used to identify the sites of river channel shifts with GIS analysis. Finally a non-invasive geochemical mapping started, using portable X-ray fluorescence (XRF) and gamma spectrometers. The resulting datasets were processed by spatial statistical methods. One of the main outputs of our study was the detailed analysis of pollution distribution in the floodplain. The results showed a relationship between deposition of polluted sediments and the past channel shifts. We found that an increased concentration of pollution occurred mainly in the cut-off meanders and lateral channel deposits from the period of mining, the latter being endangered by reworking (turning back to the river) in next decades.

Název v anglickém jazyce

Threat of pollution hotspots reworking in river systems: Example of the Ploučnice River (Czech Republic)

Popis výsledku anglicky

Mapping and evaluation of historically polluted fluvial sediments is an urgent topic as they may endanger quality of water and solids transported by rivers and thus impact biota including humans. The polluted sediment reworking may be triggered by floods and sometimes also by river engineering or revitalisation. A combination of diverse methods including geoinformatics allows pollution hotspots identification in floodplains and evaluation of their potential for their future reworking. The Ploučnice River and its floodplain were polluted by local uranium mining (U-mining) in 1971-1989. This river has been studied since 2013 in aim to identify the relationship between the floodplain geomorphology and the spatial distribution of pollutants. Archive information on pollution history and past floods, old maps and aerial photographs, and older low-resolution gamma activity aerial survey were collected to understand the floodplain development and pollution heterogeneity. Afterwards, digital terrain model based on publically available LiDAR data (airborne laser scanning) was used to identify the sites of river channel shifts with GIS analysis. Finally a non-invasive geochemical mapping started, using portable X-ray fluorescence (XRF) and gamma spectrometers. The resulting datasets were processed by spatial statistical methods. One of the main outputs of our study was the detailed analysis of pollution distribution in the floodplain. The results showed a relationship between deposition of polluted sediments and the past channel shifts. We found that an increased concentration of pollution occurred mainly in the cut-off meanders and lateral channel deposits from the period of mining, the latter being endangered by reworking (turning back to the river) in next decades.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/GA15-00340S" target="_blank" >GA15-00340S: Antropogenní znečištění a stavba říčních niv: dva fenomény a jediný příběh</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

GIS Ostrava 2018 - GIS for Safety &amp; Security Management

ISBN

978-80-248-4235-6

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

18

Strana od-do

159-176

Název nakladatele

Department of Geoinformatics, VŠB - Technical University of Ostrava

Místo vydání

Ostrava - Poruba

Místo konání akce

Ostrava

Datum konání akce

21. 3. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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