The Role of Climate Variability on Spatio_temporal of Rainfall Erosivity (A Case Study: Fashand Drainage Basin)

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NAZARI SAMANI ALIAKBAR; Zarrin Behnaz; KHALIGHI SIGAROUDI SHAHRAM

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Journal: Journal of Range and Watershed Managment Year:2019 | Volume:72 | Issue:1 Page(s): 279-290

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Information Journal Paper

Title

The Role of Climate Variability on Spatio_temporal of Rainfall Erosivity (A Case Study: Fashand Drainage Basin)

Author(s)

NAZARI SAMANI ALIAKBAR | Zarrin Behnaz | KHALIGHI SIGAROUDI SHAHRAM | Issue Writer Certificate

Keywords

Rain ErosivityQ1

InterpolationQ2

Continental ChangeQ1

SPIQ1

Modified FournierQ1

Abstract

Rainfall erosivity (RE) energy is an important factor on the soil detachment and transition of them implying an important role on the regional potential region erosion. . In this study SPI index was used in order to determine the climate condition and its consequent effects on RE in Fashand watershed, Elburz province. At first the drought, wet and normal periods were determined for four rain gage station and then, both EI30 and Modified Fournier index (MFI) were calculated at each gauge station. The regression analysis was used to investigate the relationship between EI30, MFI and 24-hour rainfall as well as annual rainfall of data-logging rainfall stations. After that through applying the regression equation the EI30 was extrapolated for eleven typical rain gauges over the different climate periods. The best correlation was obtained between EI30 and annual rainfall (R2 = 0. 71). The spatial zonation RE maps were extracted through Geostatistical analysis for drought, wet and normal condition. According to the findings the effects of climate variability on the amount of RE are significant. Maximum and minimum RE are related to the wet and dry period respectively. However the RE on the summer season of dry condition is more than the wet condition and such condition together with low vegetation cover related to the drought condition lead to complicated situation. DeSPIte the popular thought that the low RE can be addressed into the drought condition the rainfall pattern affect the erosivity potential and not the amount of precipitation.

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APA: Copy

NAZARI SAMANI, ALIAKBAR, Zarrin, Behnaz, & KHALIGHI SIGAROUDI, SHAHRAM. (2019). The Role of Climate Variability on Spatio_temporal of Rainfall Erosivity (A Case Study: Fashand Drainage Basin). JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), 72(1 ), 279-290. SID. https://sid.ir/paper/398981/en

Vancouver: Copy

NAZARI SAMANI ALIAKBAR, Zarrin Behnaz, KHALIGHI SIGAROUDI SHAHRAM. The Role of Climate Variability on Spatio_temporal of Rainfall Erosivity (A Case Study: Fashand Drainage Basin). JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES)[Internet]. 2019;72(1 ):279-290. Available from: https://sid.ir/paper/398981/en

IEEE: Copy

ALIAKBAR NAZARI SAMANI, Behnaz Zarrin, and SHAHRAM KHALIGHI SIGAROUDI, “The Role of Climate Variability on Spatio_temporal of Rainfall Erosivity (A Case Study: Fashand Drainage Basin),” JOURNAL OF RANGE AND WATERSHED MANAGEMENT (IRANIAN JOURNAL OF NATURAL RESOURCES), vol. 72, no. 1 , pp. 279–290, 2019, [Online]. Available: https://sid.ir/paper/398981/en

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