Evaluation of water erosion risk of Badinska River catchment, Southwest Bulgaria

Pavlova-Traykova, Eli; Marinov, I.; Dimov, Petar

doi:10.2298/gsf1715089p

Cited by 4 publications

(3 citation statements)

References 8 publications

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“…Wilford et al (2004) state that Melton ratio in a range 0.26-1.21 characterizes debris flood watersheds. Similar statements are presented by Pavlova-Traykova et al (2017) and Baltakova et al (2018). Debris flows are often induced in gullies and mobilize large volumes of unconsolidated earth masses.…”

Section: Resultssupporting

confidence: 89%

Topographic factor of water erosion – analysis of watershed morphometry and RUSLE LS factor in GIS environment

Nikolova¹,

Mitova²,

Dimitrov³

2022

Rev. Bulg. Geol. Soc.

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Soil erosion is the most serious soil degradation factor on the territory of Bulgaria. Nearly 66 % of its area have slopes in a range greater than 3°. The predominant hilly-mountainous relief and high slope degrees are prerequisites for development of water erosion. The properties of the topographic surface as a conditioning factor of erosion processes are evaluated in the current study on the example of the Dzhebelska River watershed (Southern Bulgaria). The following morphometric parameters are considered: basin relief, Melton index, slope and stream power index (SPI). Slope length and steepness factor (LS factor) is calculated using the slope degree and specific contributing area. The values vary between 0 and 43.36. The results of the analysis of the morphometric parameters indicate high erosion susceptibility in the upper and the middle part of the watershed but active erosion can be observed too in the low part of the watershed, where first order streams (Strahler’s method) flows directly to the river of fifth order. The current study is done in GIS environment on the base of 12 m digital elevation model.

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Section: Resultssupporting

confidence: 89%

Topographic factor of water erosion – analysis of watershed morphometry and RUSLE LS factor in GIS environment

Nikolova¹,

Mitova²,

Dimitrov³

2022

Rev. Bulg. Geol. Soc.

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“…and spruce (Picea abies Karst.). They have in common the steep slopes, which are the main factor for soil erosion in the Struma river (Martensson et al, 2001;Malinov et al, 2009) watershed and its tributaries (Pavlova-Traykova et al, 2017;Pavlo-vaTraykova, 2019). In this case it means it is also the main factor for the high quantity of transported sediment in this watershed.…”

Section: Results and Disscusionmentioning

confidence: 99%

Using the EPM method for the estimation of soil erosion in forest territories in the upper part of Dzherman River

Pavlova-Traykova¹

2022

SBAL

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One of the most vulnerable to soil erosion parts in Bulgaria is the Struma river watershed. In the past, a lot of erosion control activities have been carried out in this catchment, but the topographic condition and easily prone to soil erosion soils are still redounding to erosion processes.  As a global problem with severe effects on the environment, soil erosion is on the agenda of scientific community. Because of difficult recognition on time, various methods for erosion risk and sediment loss assessment were applied. For mountainous watersheds one of the most appropriate approach is Erosion Potential Model (EPM). The study aims to evaluate soil erosion and investigate its spatial distribution by applying EPM, also known as Gavrilovic method. The object of investigation is the upper part of the Dzherman river, which is tributary of Struma river. The method was implemented only for forest territories to determine the most vulnerable part of the forest. The results showed that for the forest territories the average value of the coefficient Z is 0.19, which defines erosion as “low” and the average soil loss only for forest areas is 15.28 m3/km2/year. Nevertheless there are territories with more than 100 m3/km2/year. 

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“…As for watersheds, the environmental damage caused by water erosion is numerous [8,9,[17][18][19][20][21][22][23]. The eroded particles rich in ne mineral and organic fractions will be transported and deposited to make a chemical enrichment in nutrients, used frequently in agriculture (phosphorus and nitrogen).…”

Section: Introductionmentioning

confidence: 99%

Spatial Assessment of Soil Erosion Using RUSLE Model, Remote Sensing and GIS: A Case Study of Mellegue Watershed, Algeria- Tunisia

Weslati

Serbaji

2023

Preprint

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Soil erosion is an important global phenomenon that can cause many impacts, like shape and hydrology alteration, land degradation, and landslides. Moreover, soil loss has a significant effect on agricultural production by removing most valuable and productive top soil’s profile, leading to reduction in yields which requires high production budget. Soil erosion impact has been intensified by the magnification of global warning and drought, especially in north African regions, such as Tunisia and Algeria, where arid climate is the dominant weather on these regions. In addition, these regions are suffering from soil erosion by water which had cost a serious soil loss regionally and globally. Accordingly, this study aimed to compare soil losses, between 2002 and 2020, of the catchment of Mellegue which is a large cross-border basin commonly shared between Tunisian-Algerian countries. Soil erosion risk was assessed and mapped via the Revised Universal Soil Loss Equation (RUSLE). It requires diverse factors that are integrated in the erosion process such are topography, soil erodibility, rainfall erosivity, anti-erosion cultivation practice and vegetation cover. The computation of the various equation factors was applied in a GIS environment, using ArcGIS desktop 10.4. The results shows that the catchment has undergone significant soil water erosion where it exhibits the appearance of approximate 14000 new areas vulnerable to erosion by water in 2020 compared to 2002. Average erosion risk has also increased from 1.58 t/ha/year in 2002 to 1.78 in 2020 leading to an increase in total estimated soil loss by reaching 54000 t/ha in 2020 compared to around 25500 t/ha in 2002. Mapps of erosion risk shows that highly eroded areas are more frequent in downstream of the basin. These maps can be helpful for decision-makers to make better sustainable management plan and for land use preservation.

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Evaluation of water erosion risk of Badinska River catchment, Southwest Bulgaria

Cited by 4 publications

References 8 publications

Topographic factor of water erosion – analysis of watershed morphometry and RUSLE LS factor in GIS environment

Topographic factor of water erosion – analysis of watershed morphometry and RUSLE LS factor in GIS environment

Using the EPM method for the estimation of soil erosion in forest territories in the upper part of Dzherman River

Spatial Assessment of Soil Erosion Using RUSLE Model, Remote Sensing and GIS: A Case Study of Mellegue Watershed, Algeria- Tunisia

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