PREDICTING SOIL EROSION BASED ON UNIVERSAL SOIL LOSS EQUATION IN DRY FARMING LANDS OF SEMI-ARID REGIONS IN NORTH WEST OF IRAN

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VAEZI A.R.; BAHRAMI H.A.; SADEGHI S.H.R.; MAHDIAN M.H.

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Journal: AGRICULTURAL RESEARCH Year:2007 | Volume:7 | Issue:2 Page(s): 13-24

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Title

PREDICTING SOIL EROSION BASED ON UNIVERSAL SOIL LOSS EQUATION IN DRY FARMING LANDS OF SEMI-ARID REGIONS IN NORTH WEST OF IRAN

Author(s)

VAEZI A.R. | BAHRAMI H.A. | SADEGHI S.H.R. | MAHDIAN M.H. | Issue Writer Certificate

Keywords

SOIL EROSIONQ3

USLEQ3

SPATIAL VARIATIONSQ3

SEMI-ARID REGIONQ3

SOIL EROSION MAPQ3

Abstract

SOIL EROSION by water is an important problem in farming lands particularly in SEMI-ARID REGIONs. This study was conducted to predict SOIL EROSION based on the universal soil loss equation (USLE), find out predicting error, determine spatial variation of SOIL EROSION and provide a SOIL EROSION map in dry farming lands in SEMI-ARID REGIONs. The study was carried out in an agricultural zone with a dimension of 30Ian in south part of East Azerbaijan province from March 2005 to March 2006. In the study area, 36 dry farming lands on 9% uniform slopes that had plowed on slope direction with no cover crop on surface, were considered. SOIL EROSION was measured in each farming land under natural rainfall events during the study period and predicted based on the USLE by multiplying rainfall erosivity (R), soil erodibility (K) and slop length (L) factors. The rainfall erosivity factor (R) on the study area was 448.707 MJ mml ha h per year. Mean valiue of the soil erodibility factor (K) and slop length factor (L) were 0.0360 th/MJ mm and 1.519, respectively.Based on the results, annual predicted SOIL EROSION (24.621 t/ha) averagely was 10.98 times larger than the measured value (2.888 t/ha). Effective range of the predicted SOIL EROSION (4.5 km) also was bigger than the predicted value (2.4 km) on the study area. The predicted values of SOIL EROSION in all places on the study area were larger than the measured values. These differences were due to estimating errors of factors affecting predicted erosion (R, K and L). The study showed that the USLE is not accurade in predicting SOIL EROSION in SEMI-ARID REGIONs.

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APA: Copy

VAEZI, A.R., BAHRAMI, H.A., SADEGHI, S.H.R., & MAHDIAN, M.H.. (2007). PREDICTING SOIL EROSION BASED ON UNIVERSAL SOIL LOSS EQUATION IN DRY FARMING LANDS OF SEMI-ARID REGIONS IN NORTH WEST OF IRAN. AGRICULTURAL RESEARCH, 7(2), 13-24. SID. https://sid.ir/paper/84701/en

Vancouver: Copy

VAEZI A.R., BAHRAMI H.A., SADEGHI S.H.R., MAHDIAN M.H.. PREDICTING SOIL EROSION BASED ON UNIVERSAL SOIL LOSS EQUATION IN DRY FARMING LANDS OF SEMI-ARID REGIONS IN NORTH WEST OF IRAN. AGRICULTURAL RESEARCH[Internet]. 2007;7(2):13-24. Available from: https://sid.ir/paper/84701/en

IEEE: Copy

A.R. VAEZI, H.A. BAHRAMI, S.H.R. SADEGHI, and M.H. MAHDIAN, “PREDICTING SOIL EROSION BASED ON UNIVERSAL SOIL LOSS EQUATION IN DRY FARMING LANDS OF SEMI-ARID REGIONS IN NORTH WEST OF IRAN,” AGRICULTURAL RESEARCH, vol. 7, no. 2, pp. 13–24, 2007, [Online]. Available: https://sid.ir/paper/84701/en

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