Effect of plot scale on runoff under natural rainfall (Case study; Saravan region, Rasht)

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Parhizgar Misagh; ASADI HOSSEIN; Moussavi Sayed Ali

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Paper Information

Journal: Iranian Journal of Soil and Water Research Year:2018 | Volume:48 | Issue:5 Page(s): 1133-1144

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Title

Effect of plot scale on runoff under natural rainfall (Case study; Saravan region, Rasht)

Author(s)

Parhizgar Misagh | ASADI HOSSEIN | Moussavi Sayed Ali | Issue Writer Certificate

Keywords

Erosion plotsQ2

InfiltrationQ1

Runoff coefficientQ1

ScalingQ2

Abstract

One of the challenges to progress in hydrology and soil science researches is that the theories are only applied to certain time-space scales. This study was carried out to find out the effect of plot size on runoff generation and to quantify it’ s scale effects on runoff generation. For this purpose, 6 experimental plots with the length of 3 to 60 m and the width of 1 to 6 m were established on a hillside in the Saravan region of Rasht, Guilan province, Iran. The outflow runoff data was collected from October to May 2015, and then the data were analyzed. Also, the height of rainfall was measured for each plot using rain gauges. Results of the study showed that as the length of plots increase, the amount of runoff per unit area decrease with a non-linear pattern. The Comparison between the mean values of the plots confirmed that there are no significant differences among plots with lengths longer than 10 m in terms of runoff yield. However, there were significant differences among plots with a shorter or a longer size (P > 0/05). The research results verified the optimal length of 10 m for Scaling proposes. A two-parameter model was used for Scaling hillslope runoff ratio. Model parameters were determined by model calibration using 9 rain events. The evaluation of the model showed its appropriate efficiency for plots shorter than 30 m long.

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APA: Copy

Parhizgar, Misagh, ASADI, HOSSEIN, & Moussavi, Sayed Ali. (2018). Effect of plot scale on runoff under natural rainfall (Case study; Saravan region, Rasht). IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 48(5 ), 1133-1144. SID. https://sid.ir/paper/225419/en

Vancouver: Copy

Parhizgar Misagh, ASADI HOSSEIN, Moussavi Sayed Ali. Effect of plot scale on runoff under natural rainfall (Case study; Saravan region, Rasht). IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2018;48(5 ):1133-1144. Available from: https://sid.ir/paper/225419/en

IEEE: Copy

Misagh Parhizgar, HOSSEIN ASADI, and Sayed Ali Moussavi, “Effect of plot scale on runoff under natural rainfall (Case study; Saravan region, Rasht),” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 48, no. 5 , pp. 1133–1144, 2018, [Online]. Available: https://sid.ir/paper/225419/en

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