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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • 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