Testing sensitivity of BILAN and GR2M models to climate conditions in the Gambia River Basin

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10486337" target="_blank" >RIV/00216208:11310/24:10486337 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41330/24:100798

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=v2_PuBDTiS" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=v2_PuBDTiS</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2478/johh-2023-0044" target="_blank" >10.2478/johh-2023-0044</a>

Result language

angličtina

Original language name

Testing sensitivity of BILAN and GR2M models to climate conditions in the Gambia River Basin

Original language description

This study investigates the performance of two lumped hydrological models, BILAN and GR2M, in simulating runoff across six catchments in the Gambia River Basin (Senegal) over a 30-year period employing a 7-year sliding window under different climatic conditions. The results revealed differences in overall performance and variable sensitivity of the models to hydrological conditions and calibration period lengths, stemming from their different structure and complexity. In particular, the BILAN model, which is based on a more complex set of parameters, showed better overall results in simulating dry conditions, while the GR2M model had superior performance in wet conditions. The study emphasized the importance of the length of the calibration period on model performance and on the reduction of uncertainty in the results. Extended calibration periods for both models narrowed the range of the Kling-Gupta Efficiency (KGE) values and reduced the loss of performance during the parameter transfer from calibration to validation. For the BILAN model, a longer calibration period also significantly reduced the variability of performance metric values. Conversely, for the GR2M model, the variability rate did not decrease with the length of the calibration periods. Testing both models under variable conditions underscored the crucial role of comprehending model structure, hydrological sensitivity, and calibration strategy effects on simulation accuracy and uncertainty for reliable results.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10508 - Physical geography

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2024

Confidentiality

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

Name of the periodical

Vodohospodářský časopis/Journal of Hydrology &amp; Hydromechanics

ISSN

0042-790X

e-ISSN

1338-4333

Volume of the periodical

72

Issue of the periodical within the volume

1

Country of publishing house

SK - SLOVAKIA

Number of pages

17

Pages from-to

131-147

UT code for WoS article

001163240300008

EID of the result in the Scopus database

2-s2.0-85185194161