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在《河南省干江河燕山水库初步设计报告》中,对燕山水库汛期洪水分期作了初步设计,根据暴雨洪水的时间分布划分为:主汛期6月20日至8月15日,后汛期8月15日至9月末。本次根据燕山水库的基本资料,选取了:旬暴雨日数、旬面平均雨量、旬最大1日面平均雨量、旬最大3日面平均雨量、旬最大7日面平均雨量以及旬入库水量等6个指标,釆用最优分割法,构建了燕山水库汛期划分计算模型,对燕山水库汛期分期重新作了计算。本次计算所得的汛期分期划分成果为:前汛期6月1日至6月20日,主汛期6月20日至8月31日,后汛期9月1日至9月末。因此,本次分期划分成果与初步设计报告成果基本一致,主汛由8月中旬延迟至8月下旬,增加前汛期分期。
In “Preliminary Design Report of Yanshan Reservoir in Ganjiang River in Henan Province”, preliminary design is made for the flood season of Yanshan Reservoir. According to the time distribution of storm flood, the main flood season is from June 20 to August 15 and the later flood season is August From the 15th to the end of September. According to the basic information of Yanshan Reservoir, this paper selected: the number of days of heavy rain, the average rainfall in late ten days, the maximum daily average rainfall in ten days, the maximum daily average rainfall in ten days, the maximum average daily rainfall in ten days and the water quantity in ten days 6 indicators, preclude the use of optimal segmentation method, construction Yanshan reservoir flood season division model, Yanshan Reservoir flood season staging re-calculated. The calculated flood season staging results as follows: the first flood season June 1 to June 20, the main flood season June 20 to August 31, the latter flood season from September 1 to the end of September. Therefore, the results of this staging division are consistent with those of the preliminary design report. The main flood season will be postponed from mid August to late August, with an increase of the first flood season.