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Analysis on Hydrologic Stability of Agricultural Reservoir According to Estimation and Application of Probable Maximum Flood

  • Crisisonomy
  • Abbr : KRCEM
  • 2014, 10(2), pp.105-115
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general

Seungjin Maeng 1 김형산 1 정지혜 1 김상우 2

1충북대학교
2농어촌공사

Accredited

ABSTRACT

The probable maximum precipitation(PMP) at Biryong reservoir and Wonnam reservoir, both selected as the target reservoirs, was recalculated using the flood control system for the reservoir. The hydrological stability of the reservoirs was investigated by tracking the flood water level of the target reservoirs using the spillway discharge based on water level changed by the calculated PMP. Results of the investigation on the hydrological stability of the Biryong reservoir and Wonnam reservoir showed that the maximum water level did not overflow the full reservoir level in both reservoirs. However, hydrological stability could not be secured because the allowable height fell short by 1.2m and 1.5m, respectively. The analysis also found that structural measures such as spillway expansion or non-structural measures, like reservoir operating rules for the flood season, are needed to ensure the hydrological stability of the two reservoirs. The probable maximum flood(PMF) at the Biryong reservoir and Wonnam reservoir calculated by applying the change in reservoir design criteria exhibited a higher peak flood of about 150-285%, compared to the 200-year frequency probability flood calculated using the reservoir design standards of the past.

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