Assessment of rainfall erosivity in Southwest Bulgaria using the Fournier index

Nikolova, Nina; Matev, Simeon; Alili, Imеrlije

doi:10.52215/rev.bgs.2022.83.3.221

Cited by 2 publications

(4 citation statements)

References 8 publications

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“…In general, the Fournier index had higher values for the years with annual precipitation anomalies below the average for the period 1951-2020 and during these years on the background of low monthly precipitation high precipitation amounts were observed during the low monthly precipitation. Similar results were found by Nikolova et al (2022) for the southwest part of Bulgaria which is the neighboring territory of the Republic of North Macedonia. Intense rainfall during periods of drought can lead to significant development of soil erosion.…”

Section: Resultssupporting

confidence: 86%

“…The utilization of data from pluviographic records is quite difficult for the estimation of the rainfall erosivity and in some cases, there could be a lack of data, especially in certain local regions. Therefore, in order to assess the rainfall erosivity assessment in heterogeneous climate regions, the Fournier index (FI) and modified Fournier index (MFI) which correspond very well with the erosive R-factor for rainfall are recommended (Diodato, Bellocchi, 2007;Nikolova et al, 2022). Fournier (1960) conducted a regression analysis between sedimentation in rivers and several rainfall variables, finding a high correlation between the total annual erosion and the distribution coefficient of rainfall or, most commonly named, Fournier index (FI).…”

Section: Study Area Data and Methodsmentioning

confidence: 99%

“…The results emphasize the importance of considering land use dynamics in erosion risk assessments and planning conservation strategies. Nikolova et al (2022) investigate the rainfall erosivity assessment in some regions of Bulgaria by utilizing the Fournier Index and Modified Fournier Index. Salako (2008) found a decreasing trend of rainfall in West Africa, where rainfall erosivity is also considered to be high.…”

Section: Introductionmentioning

confidence: 99%

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Rainfall erosivity in the Republic of North Macedonia: Fournier index approach

Alili

2023

Eng. Geol. and Hydrogeol.

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Rainfall erosivity is a crucial factor influencing soil erosion, which results from the detachment, transportation, and deposition of soil particles caused by rainfall and runoff. Rainfall erosivity assessment is a fundamental process aimed at quantifying the erosive power of rainfall events in a given region. The paper provides an overview of rainfall erosivity assessment in several heterogeneous regions of the Republic of North Macedonia based on rainfall data from meteorological stations characterized by different climatic and geographical conditions. Having into consideration that rainfall erosivity can be quantified by using various indices, this study uses two common ones: Fournier Index (FI) and the Modified Fournier Index (MFI) based on monthly and annual precipitation totals for the period 1951-2020. The results imply that in general, the studied stations belong to a low class of erosivity. It is found that FI has greater sensitivity and provides more details, also showing years with high and even very high rainfall erosivity while MFI gives more information for moderate rainfall erosivity.

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Section: Resultssupporting

confidence: 86%

Section: Study Area Data and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rainfall erosivity in the Republic of North Macedonia: Fournier index approach

Alili

2023

Eng. Geol. and Hydrogeol.

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“…The results of the present study show that the MFI gives more detailed information about and is more reliable for rainfall erosivity analyses than the FI. Similar results regarding the applicability of the MFI were found by other authors [10,48].…”

Section: Fournier Index and Modified Fournier Indexsupporting

confidence: 90%

Annual and Seasonal Characteristics of Rainfall Erosivity in the Eastern Rhodopes (Bulgaria)

Nikolova,

Stefanova

et al. 2024

Atmosphere

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Rainfall, with its intensity, duration, and seasonal distribution, is among the main factors causing soil erosion, which is a widespread environmental problem in Bulgaria. Rainfall erosivity shows the potential of precipitation to generate erosion processes and is an essential indicator of the climate vulnerability of a region. This paper aims to evaluate rainfall erosivity in a part of the Eastern Rhodopes Mountains, an area that is characterised by high-intensity erosion processes and high erosion risk. Local peculiarities of rainfall erosivity were revealed by the calculation of some precipitation indices based on the monthly precipitation for the period 2000–2021, such as the precipitation concentration index (PCI), Angot precipitation index, Fournier index (FI), and modified Fournier index (MFI). The analysis of the extremely wet and extremely dry months at the annual and seasonal (October–March and April–September) levels was performed to evaluate the susceptibility to erosion. The results from the study show that rainfall erosivity in the studied area varies from low to moderate in the northern part of the study area and from high to very high in the south. According to the MFI, high and very high erosivities have been observed mainly since 2012. The erosivity increases from north to south, to the area with a complex relief, where the combination of orography and atmospheric circulation make favourable conditions for the occurrence of extreme precipitation. The analyses of the calculated indices show that the precipitations in most of the studied area generally have from a low to a moderate erosivity, but this does not exclude the occurrence of cases with high and very high erosivities, which are characteristic of recent years and are related to the increase in annual precipitations and extreme precipitation months. The results of this study can contribute to the development and implementation of measures and preventive activities for the reduction and possible elimination of the negative impacts of extreme precipitation.

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Assessment of rainfall erosivity in Southwest Bulgaria using the Fournier index

Cited by 2 publications

References 8 publications

Rainfall erosivity in the Republic of North Macedonia: Fournier index approach

Rainfall erosivity in the Republic of North Macedonia: Fournier index approach

Annual and Seasonal Characteristics of Rainfall Erosivity in the Eastern Rhodopes (Bulgaria)

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