EVALUATION OF PROCESS-BASED SOIL EROSION MODEL, GUEST, FOR ONE SAMPLE OF SOILS OF KHAJEH (TABRIZ) REGION

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SAEDI S.; PAZIRA E.; ROUHIPOUR H.; NEYSHABOURI M.R.; SAGHAFIAN B.; SADEGHZADEH M.E.

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Journal: Year:2005 | Volume:11 | Issue:3 Page(s): 201-214

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Title

EVALUATION OF PROCESS-BASED SOIL EROSION MODEL, GUEST, FOR ONE SAMPLE OF SOILS OF KHAJEH (TABRIZ) REGION

Author(s)

Keywords

GUEST MODELQ3

KHAJEH REGIONQ4

PROCESS-BASED MODELQ4

SOIL EROSIONQ4

Abstract

In recent decades, the SOIL EROSION studies have been found to be of great importance due to environmental and economic aspects as soil resource loss has a significant impact on sustainable land management. In this respect, PROCESS-BASED MODELs for simulation and quantification of erosion processes have been developed. The GUEST MODEL incorporates the simultaneous erosion and deposition processes as well as an assessment of the rate of surface flow action upon shear stress considers. Experiments undertaken on selected soils of Khajeh (Tabriz) region have been undertaken. Rainfall simulation has been used using a variable discharge dropper system for the simulation of rainfall rates (20, 35, 50 and 75 mmh-1). Basin and flume system 81 cm2 in area were used during the simulations along with splash tray for the measurement of rainfall splash sediment and wet sieving to evaluate aggregate stability. Slopes of 3, 7, 15 and 20 % were selected for simulations. Using the model, sediment and runoff data was analyzed and a sensitivity analysis undertaken. The results indicate, at all rainfall rates, the changes in sediment concentration and time are similar and the similar decreasing trend be found to about 30 minutes.Sensitivity index of average sediment concentration indicate erodibility and deposit ability are the most effective factors respectively. The changes of sediment concentration as result of splash and rainfall rates followed by linear relation and have an accepted R2. Statistic analysis for sediment concentration as result of runoff and splash indicates significantly fitting linear model and implies desirable agreement between estimated and observed data. MAE and MBE indexes indicate less percentage of error in estimate of splash sediment regard the runoff and underestimate of the splash model. Estimation of the efficiency coefficient for splash, calculated 98 % comparison to 60 % for runoff.

Cites

EROSION ZONING USING EPM MODEL IN GOLESTAN PROVINCE

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APA: Copy

SAEDI, S., PAZIRA, E., ROUHIPOUR, H., NEYSHABOURI, M.R., SAGHAFIAN, B., & SADEGHZADEH, M.E.. (2005). EVALUATION OF PROCESS-BASED SOIL EROSION MODEL, GUEST, FOR ONE SAMPLE OF SOILS OF KHAJEH (TABRIZ) REGION . JOURNAL OF AGRICULTURAL SCIENCES, 11(3), 201-214. SID. https://sid.ir/paper/7826/en

Vancouver: Copy

SAEDI S., PAZIRA E., ROUHIPOUR H., NEYSHABOURI M.R., SAGHAFIAN B., SADEGHZADEH M.E.. EVALUATION OF PROCESS-BASED SOIL EROSION MODEL, GUEST, FOR ONE SAMPLE OF SOILS OF KHAJEH (TABRIZ) REGION . JOURNAL OF AGRICULTURAL SCIENCES[Internet]. 2005;11(3):201-214. Available from: https://sid.ir/paper/7826/en

IEEE: Copy

S. SAEDI, E. PAZIRA, H. ROUHIPOUR, M.R. NEYSHABOURI, B. SAGHAFIAN, and M.E. SADEGHZADEH, “EVALUATION OF PROCESS-BASED SOIL EROSION MODEL, GUEST, FOR ONE SAMPLE OF SOILS OF KHAJEH (TABRIZ) REGION ,” JOURNAL OF AGRICULTURAL SCIENCES, vol. 11, no. 3, pp. 201–214, 2005, [Online]. Available: https://sid.ir/paper/7826/en

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