Estimation of climatic and anthropogenic contributions to streamflow change in southern Romania

Chelu, Alexandra; Zaharia, Liliana; Dubreuil, Vincent

doi:10.1080/02626667.2022.2098025

Cited by 5 publications

(1 citation statement)

References 63 publications

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“…The high water demands for social-economic needs and agricultural crops make the region vulnerable to drought and water deficit. This vulnerability is likely to be accentuated in conditions where, in recent decades, the south of Romania appears to be affected by aridization trends [25][26][27]. Consequently, studies on precipitation in this part of Romania are of high interest both scientifically and, especially, practically.…”

Section: Figurementioning

confidence: 99%

On the Examination of the Relationship between Mean and Extreme Precipitation and Circulation Types over Southern Romania

Tolika,

Traboulsi,

Anagnostopoulou

et al. 2023

Atmosphere

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The main goal of the present study is to identify the prevailing atmospheric circulation patterns (circulation types) that are associated with the occurrence of precipitation (both mean and extreme) over southern Romania. A daily circulation type calendar derived from an automatic and objective classification scheme is used in synergy with the daily precipitation time series from five weather stations in the study area for a sixty-year period (1961–2020). Both mean and extreme precipitation do not show statistically significant trends, except for the annual precipitation at Constanța, for the value with daily precipitation totals greater than the 95th percentile at Craiova and the number of days exceeding the 99th percentile at Buzău and Râmnicu -Vâlcea, where significant negative trends were noticed. Moreover, the precipitation trends were analyzed in relation to the atmospheric circulation types. Non-significant positive trends were observed for the precipitation amounts (annually, winter, spring, and autumn) corresponding to very rainy circulation types (C, Cwsw), while for summer, the equivalent trends were negative. Moreover, it became evident that during extreme precipitation events, the predominant circulation types (C, Cwsw) are associated with western or almost western atmospheric circulation and Mediterranean- or Atlantic-originated depressions.

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Section: Figurementioning

confidence: 99%

On the Examination of the Relationship between Mean and Extreme Precipitation and Circulation Types over Southern Romania

Tolika,

Traboulsi,

Anagnostopoulou

et al. 2023

Atmosphere

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Attribution of Streamflow Changes Considering Spatial Contributions and Driver Interactions Based on Hydrological Modeling

Chen

Ren

et al. 2023

Water Resour Manage

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Utilizing waveform synthesis in harmonic oscillator seasonal trend model for short- and long-term streamflow drought modeling and forecasting

Raczyński,

Dyer

2024

Journal of Hydroinformatics

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This study introduces an improved version of the harmonic oscillator seasonal trend (HOST) model framework to accurately simulate medium- and long-term changes in extreme events, focusing on streamflow droughts in the Mobile River catchment. Performance of the model relative to the initial framework was enhanced through the inclusion of new mathematical models and waveform synthesis. The updated framework successfully captures long-term and seasonal patterns with a Kling–Gupta efficiency exceeding 0.5 for seasonal fluctuations and over 0.9 for trends. The best-fit model explains around 98% of long-term and approximately 55% of seasonal variance. Test sets show slightly lower accuracies, with about 20% of nodes underperforming due to the absence of drought during the test phase resulting in false-positive model forecasts. The newly developed weighted occurrence classification outperforms the binary classification occurrence model. In addition, application of an automatic period multiplier for decomposition using the seasonal trend decomposition using LOESS method improves test dataset performance and reduces false-positive forecasts. The improved framework provides valuable insights for extreme flow distribution, offering potential for improved water management planning, and the combination of the HOST model with physical models can address short-term drivers of extreme events, enhancing drought occurrence forecasting and water resource management strategies.

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Estimation of climatic and anthropogenic contributions to streamflow change in southern Romania

Cited by 5 publications

References 63 publications

On the Examination of the Relationship between Mean and Extreme Precipitation and Circulation Types over Southern Romania

On the Examination of the Relationship between Mean and Extreme Precipitation and Circulation Types over Southern Romania

Attribution of Streamflow Changes Considering Spatial Contributions and Driver Interactions Based on Hydrological Modeling

Utilizing waveform synthesis in harmonic oscillator seasonal trend model for short- and long-term streamflow drought modeling and forecasting

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