Analysis of dam-induced cyclic patterns on river flow dynamics

Hakan Tongal, Mehmet C. Demirel, Hamid Moradkhani

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

17 Citationer (Scopus)

Abstrakt

This paper investigates the impact of the Hungry Horse Dam on streamflow dynamics in the South Fork of the Flathead River, Montana, USA. To this end, pre- and post-dam periods of raw and naturalized streamflow data were analysed. Pettitt’s change point analysis indicated a significant change point in streamflow dynamics due to dam construction. Complexities in the pre- and post-dam periods were evaluated by sample and multi-scale entropy analyses, and the entropies of the post-dam period were found to be higher than those of the pre-dam period. Possible reasons for this, unrelated to the natural hydrological cycle caused by the dam, were analysed using wavelet analyses. The wavelet analyses showed a clear change in the phase relationship between precipitation and streamflow. Finally, weak positive trends found in the hydrological variables indicated the effects of human activities (e.g. dam construction). The results also revealed distorted lead times, which can improve the streamflow forecasts for different lead times.

OriginalsprogEngelsk
Sider (fra-til)626-641
Antal sider16
TidsskriftHydrological Sciences Journal
Vol/bind62
Udgave nummer4
DOI
StatusUdgivet - 12 mar. 2017

Programområde

  • Programområde 2: Vandressourcer

Fingeraftryk

Dyk ned i forskningsemnerne om 'Analysis of dam-induced cyclic patterns on river flow dynamics'. Sammen danner de et unikt fingeraftryk.

Citationsformater