Ambiguity in the results of USLE K–factor obtained by nomograph and erodibility equation
Само за регистроване кориснике
2022
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Universal Soil Loss Equation (USLE) is the most applied model for soil erosion assessment. It
takes into consideration five soil erosion factors among which soil erodibilty factor (K) is a
measure of inheritant reistance of soils to erosion. In the formulation of USLE model, K–factor
was determined experimentally, and then the authors created USLE nomograph to facilitate the
work, and in the next step, created the equation for faster K–factor determination. This paper
aims to compare K–factor obtained by USLE nomograph and USLE equation. A total number of
108 soil samples have been collected in Western Serbia. For the determination of K–values,
particle size distribution and soil organic matter were analyzed in the laboratory, whereas soil
permeability and soil structure were assessed according to the USLE document procedure. The
results have been compared using basic statistics. The average K–values obtained by nomograph
and equation differ for almost 15%. There is statistic...ally significant correlation between the two
methods, but coefficient of determination amounts to 0.5802, which indicates pretty high
deviation. Root Mean Square Error (RMSE) amounts to 0.008, which is quite high, whereas
index of agreement amounts to 0.93, representing good agreement. These results are ambiguous.
We think that 15% of absolute error is a threshold value between single samples, which occur in
only 56% of the cases. Therefore, the obtained results indicate the gaps in the determination of
K–factor and could contribute to further improvment of soil erodibilty determination and
consequently, soil erosion assessment.
Кључне речи:
Soil erodibility, USLE, soil erosionИзвор:
XIII International Scientific Agricultural Symposium “Agrosym 2022", 2022, 962-968Издавач:
- University of East Sarajevo, Faculty of Agriculture, Republic of Srpska, Bosnia
Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200116 (Универзитет у Београду, Пољопривредни факултет) (RS-MESTD-inst-2020-200116)
Институција/група
Poljoprivredni fakultetTY - CONF AU - Životić, Ljubomir AU - Gajić, Boško AU - Ćosić, Marija AU - Kaluđerović, Lazar AU - Lazović, Vojislav PY - 2022 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/6500 AB - Universal Soil Loss Equation (USLE) is the most applied model for soil erosion assessment. It takes into consideration five soil erosion factors among which soil erodibilty factor (K) is a measure of inheritant reistance of soils to erosion. In the formulation of USLE model, K–factor was determined experimentally, and then the authors created USLE nomograph to facilitate the work, and in the next step, created the equation for faster K–factor determination. This paper aims to compare K–factor obtained by USLE nomograph and USLE equation. A total number of 108 soil samples have been collected in Western Serbia. For the determination of K–values, particle size distribution and soil organic matter were analyzed in the laboratory, whereas soil permeability and soil structure were assessed according to the USLE document procedure. The results have been compared using basic statistics. The average K–values obtained by nomograph and equation differ for almost 15%. There is statistically significant correlation between the two methods, but coefficient of determination amounts to 0.5802, which indicates pretty high deviation. Root Mean Square Error (RMSE) amounts to 0.008, which is quite high, whereas index of agreement amounts to 0.93, representing good agreement. These results are ambiguous. We think that 15% of absolute error is a threshold value between single samples, which occur in only 56% of the cases. Therefore, the obtained results indicate the gaps in the determination of K–factor and could contribute to further improvment of soil erodibilty determination and consequently, soil erosion assessment. PB - University of East Sarajevo, Faculty of Agriculture, Republic of Srpska, Bosnia C3 - XIII International Scientific Agricultural Symposium “Agrosym 2022" T1 - Ambiguity in the results of USLE K–factor obtained by nomograph and erodibility equation EP - 968 SP - 962 UR - https://hdl.handle.net/21.15107/rcub_agrospace_6500 ER -
@conference{ author = "Životić, Ljubomir and Gajić, Boško and Ćosić, Marija and Kaluđerović, Lazar and Lazović, Vojislav", year = "2022", abstract = "Universal Soil Loss Equation (USLE) is the most applied model for soil erosion assessment. It takes into consideration five soil erosion factors among which soil erodibilty factor (K) is a measure of inheritant reistance of soils to erosion. In the formulation of USLE model, K–factor was determined experimentally, and then the authors created USLE nomograph to facilitate the work, and in the next step, created the equation for faster K–factor determination. This paper aims to compare K–factor obtained by USLE nomograph and USLE equation. A total number of 108 soil samples have been collected in Western Serbia. For the determination of K–values, particle size distribution and soil organic matter were analyzed in the laboratory, whereas soil permeability and soil structure were assessed according to the USLE document procedure. The results have been compared using basic statistics. The average K–values obtained by nomograph and equation differ for almost 15%. There is statistically significant correlation between the two methods, but coefficient of determination amounts to 0.5802, which indicates pretty high deviation. Root Mean Square Error (RMSE) amounts to 0.008, which is quite high, whereas index of agreement amounts to 0.93, representing good agreement. These results are ambiguous. We think that 15% of absolute error is a threshold value between single samples, which occur in only 56% of the cases. Therefore, the obtained results indicate the gaps in the determination of K–factor and could contribute to further improvment of soil erodibilty determination and consequently, soil erosion assessment.", publisher = "University of East Sarajevo, Faculty of Agriculture, Republic of Srpska, Bosnia", journal = "XIII International Scientific Agricultural Symposium “Agrosym 2022"", title = "Ambiguity in the results of USLE K–factor obtained by nomograph and erodibility equation", pages = "968-962", url = "https://hdl.handle.net/21.15107/rcub_agrospace_6500" }
Životić, L., Gajić, B., Ćosić, M., Kaluđerović, L.,& Lazović, V.. (2022). Ambiguity in the results of USLE K–factor obtained by nomograph and erodibility equation. in XIII International Scientific Agricultural Symposium “Agrosym 2022" University of East Sarajevo, Faculty of Agriculture, Republic of Srpska, Bosnia., 962-968. https://hdl.handle.net/21.15107/rcub_agrospace_6500
Životić L, Gajić B, Ćosić M, Kaluđerović L, Lazović V. Ambiguity in the results of USLE K–factor obtained by nomograph and erodibility equation. in XIII International Scientific Agricultural Symposium “Agrosym 2022". 2022;:962-968. https://hdl.handle.net/21.15107/rcub_agrospace_6500 .
Životić, Ljubomir, Gajić, Boško, Ćosić, Marija, Kaluđerović, Lazar, Lazović, Vojislav, "Ambiguity in the results of USLE K–factor obtained by nomograph and erodibility equation" in XIII International Scientific Agricultural Symposium “Agrosym 2022" (2022):962-968, https://hdl.handle.net/21.15107/rcub_agrospace_6500 .