THE EFFECT OF CLAY AMOUNT, WATERFALL HEIGHT, AND FLOW VELOCITY IN COHESIVE SOILS ON HEADCUT EROSION

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ASHOURIAN MASOUMEH; SHAFAI BAJESTAN MAHMOOD; BABAZADEH HOSSEIN

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Journal: JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION Year:2015 | Volume:4 | Issue:4 Page(s): 25-38

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Information Journal Paper

Title

THE EFFECT OF CLAY AMOUNT, WATERFALL HEIGHT, AND FLOW VELOCITY IN COHESIVE SOILS ON HEADCUT EROSION

Author(s)

ASHOURIAN MASOUMEH | SHAFAI BAJESTAN MAHMOOD | BABAZADEH HOSSEIN | Issue Writer Certificate

Keywords

GULLIESQ2

SEDIMENTQ2

TENSIONAL CRACKSQ2

WATERFALL SLOPE ANGLEQ2

Abstract

Headcut erosion is a sudden change in height or slope, which creates GULLIES and valleys and depending on different factors, it may vary from a height range of less than one inch to some feet and move upstream. This is one of the most significant types of erosions in soil losses and the major sources of SEDIMENT yield. Therefore, knowing this phenomenon, migration rate and SEDIMENT yield are important. In this study, seven samples of cohesive soils with different compositions of clay and silt, tested under different circumstances of waterfall height and flow velocity, and discussed migration rate and SEDIMENT yield. Tests were continued to reach a constant migration rate. One of the effective phenomenons in all tests was TENSIONAL CRACKS on soil surface. The size and number of these cracks have inverse relation with clay percent. The higher is the adhesion of SEDIMENT, the more vertical is the angle of waterfall migration upward. WATERFALL SLOPE ANGLE under pure clay conditions was 34.6 degrees, but it increased to 40 degrees in the soil with 50 percent clay. With the 50 percent clay reduction, headcut movement and its average velocity were 3 times more than the one with 10 percent reduction of clay. Moreover, waterfall decline, its mean velocity, and average flow rate of SEDIMENT increased by 3.5, 4.5, and 3 times, respectively.

Cites

STUDY OF THE RATE OF HEADCUT AND SEDIMENT VOLUME EROSION IN CHANNELS WITH STEEP SLOPE

References

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APA: Copy

ASHOURIAN, MASOUMEH, SHAFAI BAJESTAN, MAHMOOD, & BABAZADEH, HOSSEIN. (2015). THE EFFECT OF CLAY AMOUNT, WATERFALL HEIGHT, AND FLOW VELOCITY IN COHESIVE SOILS ON HEADCUT EROSION. JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION, 4(4), 25-38. SID. https://sid.ir/paper/232163/en

Vancouver: Copy

ASHOURIAN MASOUMEH, SHAFAI BAJESTAN MAHMOOD, BABAZADEH HOSSEIN. THE EFFECT OF CLAY AMOUNT, WATERFALL HEIGHT, AND FLOW VELOCITY IN COHESIVE SOILS ON HEADCUT EROSION. JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION[Internet]. 2015;4(4):25-38. Available from: https://sid.ir/paper/232163/en

IEEE: Copy

MASOUMEH ASHOURIAN, MAHMOOD SHAFAI BAJESTAN, and HOSSEIN BABAZADEH, “THE EFFECT OF CLAY AMOUNT, WATERFALL HEIGHT, AND FLOW VELOCITY IN COHESIVE SOILS ON HEADCUT EROSION,” JOURNAL OF WATER AND SOIL RESOURCES CONSERVATION, vol. 4, no. 4, pp. 25–38, 2015, [Online]. Available: https://sid.ir/paper/232163/en

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