Investigation of the relationship between base flow index with temperature and rainfall using wavelet coherence (Case study: Gorganroud River Basin)

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Hosseini Dooki S.R.; SEYEDIAN S.M.; ROUHANI H.; FARASATI M.

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Journal: Journal of Water and Soil Conservation Year:2019 | Volume:26 | Issue:1 Page(s): 1-25

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Title

Investigation of the relationship between base flow index with temperature and rainfall using wavelet coherence (Case study: Gorganroud River Basin)

Author(s)

Hosseini Dooki S.R. | SEYEDIAN S.M. | ROUHANI H. | FARASATI M. | Issue Writer Certificate

Keywords

Base flow indexQ2

Continuous wavelet transformQ2

TemperatureQ2

Wavelet CoherenceQ1

Abstract

Background and Objectives: Climate change has changed meteorological parameters in different parts of the world. Drought and water scarcity may lead to crisis in many countries. Therefore, the study of the past meteorological parameters changes and their effect on river flow which is a key element of water supply is important. The purpose of this study was to investigate the relationship between Temperature and rainfall parameters with Base flow index using Continuous wavelet transform and Wavelet Coherence in Gorganroud River Basin. Materials and Methods: At first, we used the base flow indices resulting from the Eckhart's two-parameter method and then the Base flow index which is the portion of groundwater in river surface flow, was calculated at six gauge stations (Tamar, Lazoreh, Nodeh, Arazkooseh, Gorgan Dam and Taghiabad). The results illustrated that the lowest annual index found at Taghiabad gauge station with a value of 0. 30 and the highest yearly baseflow index found at Tamer gauge station with a value of 0. 66. Then, the annual trend of Temperature and rainfall were investigated with Base flow index of each station in Gorganroud River Basin during a period of 33 years (1981 to 2013) using Continuous wavelet transform and Wavelet Coherence. An analysis of Wavelet Coherence analysis showed a strong relation between Temperature and rainfall with base flow. Results: Our analysis reveals the impact of yearly Temperature and rainfall on the Base flow index. Investigation of Wavelet Coherence between rainfall and Base flow index showed that there is the highest correlation between 1-4 year period length, which indirect correlation was observed in the middle years of Gorgan dam and Taghiabad stations and positive correlation in other stations and the early and the end years of Taqiabad station. Similarly, a direct relationship exists between the rainfall and the Base flow index in the 4-8 year period length, which are direct at Lazooreh and Nodeh gauge stations and indirect correlation in Tamer gauge station. Also, in the period length of 8 to 10 years, the high correlation between rainfall and Base flow index were found at Arzokesh and Nodeh gauge stations with lower correlation at Sadgegran gauge station, which arrows direction indicated direct relationship. The analysis of the Wavelet Coherence between Temperature and Base flow index exhibit positive and high strength correlation at Gorgan dam gauge station in 2005 to 2009 in 3-4 year period length, at Lazorah gauge station in 2002 to 2006 with 4 year period length and at Taghiabad gauge station in 1984 to 1989 with period length of 1 to 5 years. Indirect correlations were found at Nodeh and Tamer gauge stations between 1987 to 1990 and 2011 to 2013, respectively, with a short 2-year and 3-year period length and Taqiabad gauge station between 1993 to 2000 and between 1992 to 2013 with a long-term period of 8 to 10 years. Conclusion: The rainfall relationship with the Base flow index can be direct or indirect due to the watershed characteristics (e. g., human activities, soil, land-use, climate, hydrology, and geology). Also, in some stations there is a direct relationship in the periods and indirect relationship in the rest of the period. The relationship between the Base flow index and Temperature is also indirect in some of the stations.

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APA: Copy

Hosseini Dooki, S.R., SEYEDIAN, S.M., ROUHANI, H., & FARASATI, M.. (2019). Investigation of the relationship between base flow index with temperature and rainfall using wavelet coherence (Case study: Gorganroud River Basin). JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 26(1 ), 1-25. SID. https://sid.ir/paper/156505/en

Vancouver: Copy

Hosseini Dooki S.R., SEYEDIAN S.M., ROUHANI H., FARASATI M.. Investigation of the relationship between base flow index with temperature and rainfall using wavelet coherence (Case study: Gorganroud River Basin). JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2019;26(1 ):1-25. Available from: https://sid.ir/paper/156505/en

IEEE: Copy

S.R. Hosseini Dooki, S.M. SEYEDIAN, H. ROUHANI, and M. FARASATI, “Investigation of the relationship between base flow index with temperature and rainfall using wavelet coherence (Case study: Gorganroud River Basin),” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 26, no. 1 , pp. 1–25, 2019, [Online]. Available: https://sid.ir/paper/156505/en

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