Preprints
https://doi.org/10.5194/hess-2019-618
https://doi.org/10.5194/hess-2019-618
28 Jan 2020
 | 28 Jan 2020
Status: this preprint has been withdrawn by the authors.

Assessment of streamflow decrease due to climate vs. human influence in a semiarid area

Hamideh Kazemi, Hossein Hashemi, Fatemeh Fadia Maghsood, Seyyed Hasan Hosseini, Ranjan Sarukkalige, Sadegh Jamali, and Ronny Berndtsson

Abstract. This paper uses the Budyko method to investigate mean annual streamflow changes, due to climate variation and human influence, in the important Karkheh River Basin in western Iran. To validate the results, hydrological modelling (HBV model) and Landsat 5 Thematic Mapper (TM) images were used for the study period between 1980 and 2012. The recently developed DBEST (Detecting Breakpoints and Estimating Segments in Trend) method identified an abrupt negative change in the streamflow trend in 1994–5. The results show that the observed streamflow decrease in the Karkheh River is associated with both climate variation and human influence. The combination of increased irrigated area (from 9 to 19 % of the total basin area), reduction of forests (from 11 to 3 %), and decreasing annual precipitation has significantly reduced streamflow in the basin. Moreover, the results show that the streamflow reduction in the Karkheh Basin is more sensitive to the change in precipitation than temperature.

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Hamideh Kazemi, Hossein Hashemi, Fatemeh Fadia Maghsood, Seyyed Hasan Hosseini, Ranjan Sarukkalige, Sadegh Jamali, and Ronny Berndtsson

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Hamideh Kazemi, Hossein Hashemi, Fatemeh Fadia Maghsood, Seyyed Hasan Hosseini, Ranjan Sarukkalige, Sadegh Jamali, and Ronny Berndtsson
Hamideh Kazemi, Hossein Hashemi, Fatemeh Fadia Maghsood, Seyyed Hasan Hosseini, Ranjan Sarukkalige, Sadegh Jamali, and Ronny Berndtsson

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Short summary
This paper uses the Budyko method to investigate mean annual streamflow changes, due to climate variation and human influence, in the important Karkheh River Basin in western Iran. The results show that the observed streamflow decrease in the Karkheh River is associated with both climate variation and human influence. The combination of increased irrigated area, reduction of forests and decreasing annual precipitation has significantly reduced streamflow in the basin.