AN EVALUATING OF WEPP MODEL FOR INTERRILL SOIL EROSION

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ASADI H.; ROUHIPOUR H.; REFAHI H.GH.; SHORAFA M.

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Paper Information

Journal: IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE) Year:2007 | Volume:38 | Issue:4 Page(s): 553-562

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Title

AN EVALUATING OF WEPP MODEL FOR INTERRILL SOIL EROSION

Author(s)

ASADI H. | ROUHIPOUR H. | REFAHI H.GH. | SHORAFA M. | Issue Writer Certificate

Keywords

SOILQ3

INTERRILL EROSIONQ3

WEPP MODELQ4

ERODIBILITYQ3

RAINFALLQ3

Abstract

A variety of process-based SOIL erosion models have been developed to simulate and predict water erosion in the recent decays. Most of these SOIL erosion models are Claimed to be based upon processes effective in SOIL erosion Water Erosion Prediction Project (WEPP) is one of the most famous process-based models, in which differentiation has been made between interrill and rill processes in calculating SOIL detachment and transport. Three contrasting SOIL types were subjected to simulated RAINFALL using a 1×1×0.1 m drainable flume at varying slopes. RAINFALL was applied using a RAINFALL simulator with a single sweeping nozzle located 4 meters above the SOIL surface that sprayed drops with a mean diameter of 1.5 mm. Results indicated that WEPP-recommended equations for predicting interrill ERODIBILITY using SOIL properties are not applicable outside their US database and therefore a model calibration is indispensable. Neglecting the water depth effect on INTERRILL EROSION is probably one of the most important problems concerning WEPP MODEL. Indeed, contribution of flow driven erosion processes in interrill areas especially at steep slopes and high RAINFALL rates in conjunction with eventual interaction between flow and rain driven processes are causes of the model bias. In the other words, WEPP MODEL tends to overpredict the values on the lower end of the scale, and underpredict those on the upper end.

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References

INTERRILL EROSION AND AN EVALUATION OF SEVERAL EQUATIONS USING RAINFALL SIMULATION IN THE LABORATORY

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APA: Copy

ASADI, H., ROUHIPOUR, H., REFAHI, H.GH., & SHORAFA, M.. (2007). AN EVALUATING OF WEPP MODEL FOR INTERRILL SOIL EROSION. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), 38(4), 553-562. SID. https://sid.ir/paper/8684/en

Vancouver: Copy

ASADI H., ROUHIPOUR H., REFAHI H.GH., SHORAFA M.. AN EVALUATING OF WEPP MODEL FOR INTERRILL SOIL EROSION. IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE)[Internet]. 2007;38(4):553-562. Available from: https://sid.ir/paper/8684/en

IEEE: Copy

H. ASADI, H. ROUHIPOUR, H.GH. REFAHI, and M. SHORAFA, “AN EVALUATING OF WEPP MODEL FOR INTERRILL SOIL EROSION,” IRANIAN JOURNAL OF AGRICULTURAL SCIENCES (JOURNAL OF AGRICULTURE), vol. 38, no. 4, pp. 553–562, 2007, [Online]. Available: https://sid.ir/paper/8684/en

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