Factors controlling nitrate concentration in space and time in wells distributed along an aquifer/river interface (Káraný, Czechia)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F19%3A00000023" target="_blank" >RIV/00025798:_____/19:00000023 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/19:10390487
Result on the web
<a href="https://doi.org/10.1007/s10040-018-1854-7" target="_blank" >https://doi.org/10.1007/s10040-018-1854-7</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10040-018-1854-7" target="_blank" >10.1007/s10040-018-1854-7</a>
Alternative languages
Result language
angličtina
Original language name
Factors controlling nitrate concentration in space and time in wells distributed along an aquifer/river interface (Káraný, Czechia)
Original language description
Nitrate is necessary for agricultural productivity, but it is also one of the most common water contaminants in developed countries. The riverbank filtration (RBF) systems in Káraný (Czechia), with nearly 500 wells regularly distributed along 22 km of the alluvium aquifer/river interface, presents a unique field laboratory where the adverse effects of intensive agriculture on groundwater can be traced from >50 years of nitrate concentration records. The largest control over nitrate concentrations inthe RBF systems has been the mixing of the river-water component (low in nitrate) with the local recharge, which has a nitrate content of 100–250 mg/L. The mixing is mainly controlled by the intensity of the effective precipitation. Increases in nitrate concentration are caused by rapid hydraulic pulse propagation during the high-recharge periods to the discharge areas. In contrast, during dry periods, the river-water fraction dilutes nitrate in wells. The lowest nitrate content occurs above the weirs on the river, as well as in those areas where the alluvial aquifer is partly fed by older and/or denitrified groundwater from deeper zones of theunderlying sandstone aquifer. High nitrate concentrations occur in wells where the low saturated thickness of the alluvial aquifer limits the inflow of river water. This study shows that factors affecting nitrate concentrations in the alluvium are numerous, and that long-term sampling is necessary to distinguish the oscillations caused by variability in the recharge intensity from decadelong trends controlled by the fertilizer load and nitrate lag time in the aquifer.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10503 - Water resources
Result continuities
Project
<a href="/en/project/QJ1320213" target="_blank" >QJ1320213: Inovation of farming production systems in the environment of quaternary sediments, their evaluation and application in water sources protection zones</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Hydrogeology Journal
ISSN
1431-2174
e-ISSN
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Volume of the periodical
27
Issue of the periodical within the volume
1
Country of publishing house
DE - GERMANY
Number of pages
16
Pages from-to
195-210
UT code for WoS article
000458520300013
EID of the result in the Scopus database
2-s2.0-85053198399