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August 22, 2026Journal of Hydrologic Engineering

Assessing the Impact of Dam Spillway Releases on Flood Dynamics in Snow-Dominated Basins

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Authors

İPİsmail Bilal PekerMEM. Cansaran ErtaşAHAbdülbaki Hacı

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Overview

Hydrological modeling shows upstream dam spillway releases increased flood extent by 10% in snow-dominated basins, highlighting the critical role of proactive reservoir management.

Key Points

  • Evaluate the impact of upstream dam spillway water releases on flood extent and water depths in snow-dominated river basins during extreme spring flood events.
  • Simulated hydrology using the HBV-light model with calibrated streamflow data and validated snow water equivalent and snow cover area using ERA5-Land products.
  • Modeled 2D flood inundation and water depths using HEC-RAS, validated against satellite and drone imagery.
  • Performed scenario-based analyses comparing flood outcomes with and without upstream dam reservoir releases.
  • An abrupt spillway release with a peak discharge of 2,170 m³/s expanded the simulated flood inundation area by approximately 10%.
  • Upstream reservoir releases locally elevated flood water depths by up to 1 m compared to natural flow conditions.

Cite This Study

Peker et al. (2026) studied this question.

synapsesocial.com/papers/6a895f2aca7ade938187d985https://doi.org/10.1061/jhyeff.heeng-6831
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