Investigating the effects of land use change on surface runoff using SWAT model

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FAZELI FARSANI A.; GHAZAVI R.

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Journal: Journal of Water and Soil Conservation Year:2019 | Volume:25 | Issue:6 Page(s): 191-2016

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Title

Investigating the effects of land use change on surface runoff using SWAT model

Author(s)

FAZELI FARSANI A. | GHAZAVI R. | Issue Writer Certificate

Keywords

LandsatQ2

Land use changeQ1

Remote sensingQ1

Surface runoffQ1

SWAT modelQ1

Abstract

Background and Objectives: Evaluation of the effects of land-use change on water resources is an important component of hydrological modeling. Land use change is an important characteristic that influences erosion, evaporation, transpiration and runoff. Nowadays, preparing land use maps via satellite data and quantitative methods is very common in Remote sensing studies. These techniques were widely used by scientists in the past two decades. The main aim of this study is to investigate the potential effects of Land use change on Surface runoff production using SWAT model. Materials and Methods: The study area, namely Behesht Abad, located in the North and North East of Karoon watershed, Chaharmahal and Bakhtiari Province, Ardel Township. For this study, land use maps were created for the period of 1987-2013 using ETM Landsat satellite 7 images and OLI Landsat satellite 8 images. Then, runoff was simulated for 1984-1989 based on 1987 land use by SWAT model. For calibration and validation of the model, the SUFI-2 algorithm was used in SWAT-CUP software. Results: The statistical results of the model calibration and validation of the model during the period of 1988-1989 show an acceptable accuracy in runoff simulation. To derive the land use map of 1987 and 2013, the supervised method and the classifier program with the most similarity and the general accuracy of 80% and 85% were used. In order to evaluate the effect of Land use change on runoff potential, runoff for 1999 to 2011 period was simulated based on both 1987 and 2013 land use maps. For 1999 to 2011 period, no acceptable accuracy for estimating runoff was obtained when land use maps of 1987 were applied, whereas the accuracy of the calibration and validation increased when 2013 land use was applied. When 2013 land use map was applied, the observed runoff was in the range of the uncertainty band PPU95% of SWAT model. According to the results, the amount of Surface runoff has been increased in the recent years. Conclusion: The study of all factors affecting runoff is a difficult and very complicated task and it is necessary to study the effects of different factors using new techniques and models. The results of this study indicated that if the input data is properly prepared for SWAT model, this model has a good performance in runoff estimation. Land use mapping in accordance with the actual conditions of the region can have the greatest impact in the accuracy of the model.

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APA: Copy

FAZELI FARSANI, A., & GHAZAVI, R.. (2019). Investigating the effects of land use change on surface runoff using SWAT model. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 25(6 ), 191-2016. SID. https://sid.ir/paper/366720/en

Vancouver: Copy

FAZELI FARSANI A., GHAZAVI R.. Investigating the effects of land use change on surface runoff using SWAT model. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;25(6 ):191-2016. Available from: https://sid.ir/paper/366720/en

IEEE: Copy

A. FAZELI FARSANI, and R. GHAZAVI, “Investigating the effects of land use change on surface runoff using SWAT model,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 25, no. 6 , pp. 191–2016, 2019, [Online]. Available: https://sid.ir/paper/366720/en

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