Seasonal variations of vegetative indices and their correlation with evapotranspiration and soil water storage in a small agricultural catchment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00369026" target="_blank" >RIV/68407700:21110/23:00369026 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.17221/60/2023-SWR" target="_blank" >https://doi.org/10.17221/60/2023-SWR</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17221/60/2023-SWR" target="_blank" >10.17221/60/2023-SWR</a>
Alternative languages
Result language
angličtina
Original language name
Seasonal variations of vegetative indices and their correlation with evapotranspiration and soil water storage in a small agricultural catchment
Original language description
A precise measurement of evapotranspiration (ET) and soil water storage (SWS) is necessary for crop management and understanding hydrological processes in agricultural catchments. In this study, we extracted the vegetative indices (VIs, including normalised difference vegetation index (NDVI), soil-adjusted vegetation index (SAVI), and enhanced vegetation index (EVI)) from satellite images of the Nučice catchment. We found a consistent seasonal pattern of VIs across the catchment with higher values and variation ranges during spring and summer and lower values and variation ranges during autumn and winter. Spatial variation of VIs also followed a seasonal trend, decreasing during crop growth and increasing after crop harvesting. Seasonal correlations were observed between monthly average ET and SWS with VIs throughout one crop season, which can be expressed mathematically as exponential functions. We propose that VIs can be used as a surrogate measure for ET and SWS in catchments with poor monitoring capabilities. Further studies are required to investigate the spatial distribution of ET and SWS throughout the watershed and their relationship with VIs. Furthermore, our research emphasises the importance of subsurface recharge in the water balance of the investigated fields. It suggests that subsurface flow may be influenced by potential gradients of the water table, driving its seasonal behaviour in response to bedrock morphology.
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
40104 - Soil science
Result continuities
Project
<a href="/en/project/LTAUSA19019" target="_blank" >LTAUSA19019: Connectivity of sediment transport within intensively-used rural catchments</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Soil and Water Research
ISSN
1801-5395
e-ISSN
1805-9384
Volume of the periodical
18
Issue of the periodical within the volume
4
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
23
Pages from-to
246-268
UT code for WoS article
001094260900004
EID of the result in the Scopus database
2-s2.0-85176446108