Investigation and determination of factors affecting the shape of the flow duration curve in different climates of Iran

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

KAZEMI R.; PORHEMMAT J.; SHARIFI F.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Journal of Water and Soil Conservation Year:2018 | Volume:25 | Issue:1 Page(s): 85-105

Download Full-Text

Persian Verion

View:

488

Download:

Cites:

Information Journal Paper

Title

Investigation and determination of factors affecting the shape of the flow duration curve in different climates of Iran

Author(s)

KAZEMI R. | PORHEMMAT J. | SHARIFI F. | Issue Writer Certificate

Keywords

Flow duration curve shape IndexQ1

Climatic zonesQ1

Geometric parametersQ1

Hydrologic parametersQ1

Abstract

Background and Objectives: Improvement and development of forecasts in ungaged catchments needs to understand the interaction between the catchments parameters and hydrological response of catchments in different climates. Flow duration curve is one of the best methods for showing the hydrological response of basins and have different application in the fields of hydrology and related sciences. The shape of flow duration curve also reflects the impact of climate parameters, geology and physiography on the flow of the river and the hydrological response of the catchment. In the past decade, several studies have been done on the impact of geometric and hydrological parameters of basins on the shape of flow duration curve. Most of these studies are empirical and classified in graphical and statistical methods. The graphical method, focus on the effect of physiographic and climatic characteristics on the shape of flow duration curve. While, the statistical methods focus on statistical distribution and correlation of the physical characteristics of the catchments. Factor analysis of parameters affecting the flow duration curve will lead to accurate modeling and interpretation of catchments hydrology. The aim of this study was to determine the most important hydro-climatic and geometric factors affecting the shape of flow duration curve and investigation of relation between them in the different climates. Materials and Methods: In this study, for factor analysis of effective parameter on the shape of flow duration curve, climate maps were prepared and intersect with the layer of fourth-order watersheds and watersheds located in every climate were selected. Then at least 30 hydrometric stations with appropriate data and common period (1976-2001) in each climate zone were selected. Then 10 geometric and hydrological parameters affecting the flow duration curve including: average height, area of the watersheds, Gravelius coefficient, slope, main river length and hydro climatologically parameters including: annual rain fall, base flow index, curve number, permeability and the number of rainy days, were calculated for each basin. Flow duration curves plotted using daily flow data and the slope between Q33 to Q66 was computed as an indicator of the shape of flow duration curve, using coding in MATLAB programming environment. Factor analysis was performed and effective factors on the shape of curve were identified. The regression between the flow duration curve index and selected factors in different climate zones were extracted and analyzed. Results: The results showed that the parameters of first factor including: curve number, base flow index, recession index and the number of rainy days in all Climatic zones were common except dry climate zone. Also, curve Number in all the climate zones has the highest weight of influence. The weight influence of Geometric parameters in all areas was higher than hydrological parameter, except in very humid zone. The selected parameters for factor analysis in the humid zone were found the highest variance explained with 88 percent and the lowest in the Mediterranean zone with 72 percent. The normal distribution of errors, the coefficient of determination of more than 0. 90 and the coefficient of Durbin Watson between (1. 5-2. 5) reflects the confidence on the regression equations to estimate the slope of flow duration curve in untagged catchments in different Climatic zones. Conclusion: Overall, the factor analysis results in different Climatic zones revealed that some of the parameters classified in the first class including: curve number, base flow index and number of rainy days were common in all Climatic zones. With one exception that in dry zone, the number of rainy days was less effective and placed in second class. The factor of curve number in all climate zones was more effective than other parameters.

Cites

No record.

References

No record.

Cite

APA: Copy

KAZEMI, R., PORHEMMAT, J., & SHARIFI, F.. (2018). Investigation and determination of factors affecting the shape of the flow duration curve in different climates of Iran. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 25(1 ), 85-105. SID. https://sid.ir/paper/156384/en

Vancouver: Copy

KAZEMI R., PORHEMMAT J., SHARIFI F.. Investigation and determination of factors affecting the shape of the flow duration curve in different climates of Iran. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2018;25(1 ):85-105. Available from: https://sid.ir/paper/156384/en

IEEE: Copy

R. KAZEMI, J. PORHEMMAT, and F. SHARIFI, “Investigation and determination of factors affecting the shape of the flow duration curve in different climates of Iran,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 25, no. 1 , pp. 85–105, 2018, [Online]. Available: https://sid.ir/paper/156384/en

Related Journal Papers