关键词: 洪水资源利用, 预报预蓄, 库容整体运用, 金沙江下游梯级水库

Abstract: Reasonable utilization of flood season water resources under the premise of ensuring flood control safety is an effective way to improve the comprehensive benefits of reservoirs. This paper took the cascade reservoirs in the lower reaches of Jinsha River as the research object. Based on the reservation arrangement of flood control storage in different sub-regions and the characteristics of typical floods, the utilization strategy of flood resources in July for cascade reservoirs was systematically studied. The dynamic control conditions of flood season operation water levels were proposed with the water level of Lianhuatang Station as the main control index combined with short-and medium-term meteorological and hydrological forecasts. The storage capacity level available for flood resource utilization in July for cascade reservoirs was discussed, and the main flood control risks were analyzed and countermeasures were proposed. The results show that in the first ten days of July, when the forecast water level of Lianhuatang Station does not exceed 32.00 m and there is no rainfall process above medium intensity in the Dongting Lake water system, the cascade reservoirs in the lower reaches of Jinsha River can consider carrying out flood resource utilization by gradually floating up the operation water level. On the premise of ensuring flood control safety, it is recommended that the cascade reservoirs can float up about 9 billion m³ of flood control storage at most by the end of July. The research results can provide a strong support for the flood season dispatching operation of cascade reservoirs.

Key words: utilization of flood resources, forecast-based pre-storage, overall use of storage capacity, cascade reservoirs in the lower reaches of Jinsha River