【摘要】 本文通过对将乐县金溪建电站前的1953～1978年、建电站后的1990～2009年雨水情进行分析,结果表明:自然状态下的将乐县(1953～1978年)无论雨水大小,每年都有洪水超过警戒水位,年最大洪水发生时间在4～7月;1953～1978年有16年的当年最大洪峰水位发生在当年最大日降雨量当日至第16日内,频率为61.54%,当年最大洪峰水位发生在当年最大日降雨量的当日、第2日、第3日各有3年,频率均为11.54%;年总降雨量最高的年份,洪峰水位及流量不一定最高,但总趋势是年降雨量越大,洪峰水位及流量也越高。建电站后的1990～2009年历次洪水最大水位发生在5～8月,当年降雨量都在1 700mm以上;超警戒最大水位、流量与当年最大日降雨量相关系数分别为0.262045、0.386995,有一定相关性;1990～2009年洪水超警戒最大水位11年中,发生时间在当年最大日降雨量前(含当日)有6年,频率达54.55%;发生在当年最大日降雨量第2日之前的频率达63.64%。其中发生在当年最大日降雨量的当日与第2日的有3、1年,频率分别为27.27%、9.09%。1990～2009年20年中有9年没有超过警戒水位,说明电站蓄水后水库的防洪作用十分明显。本文根据建电站前后的雨水情变化,提出了相应的水灾防治对策。更多还原

【Abstract】 The essay analyzed on the raining data of Jiangle County from 1953 to 197,before the construction of the Jinxi Hydropower Station and from 1990 to 2009 after the construction of the Station.The results show that,under the natural conditions,from 1953 to 1978,no matter the rain intensity,the flood of each year exceeded the warning stage with the annual maximum flood happened from April to July.From 1953 to 1978,there are 16 years that the maximum peak flood level reached within 16 days after the day of maximum daily precipitation with the annual frequency of 61.54%.While there are three years respectively each for the maximum peak flood level reached at the same day,second day and third day with the frequency of 11.54%.Although the the highest year of annual total precipitation and the highest flood level and flow may not be at the same year,the general trend is that the larger the annual precipitation,the higher the flood level and flow.After the construction of the station,from 1990 to 2009,the maximum flood appeared from May to August with the annual precipitation over 1,700 mm.The correlation coefficient of the flood exceeds warning stage,flow and maximum daily precipitation is 0.262045 and 0.386995 with certain correlation.From 1990 to 2009,within these 11 years of floods exceed warning stage,there are 6 years that the occurring time before the maximum daily precipitation(including the day) with the frequency of 54.55%,while the frequency reach 63.64% that the occurring time before the second day of the maximum daily precipitation.Of which,there are three years and one year respectively at the same day and second day of the maximum daily precipitation,with the frequency of 27.27% and 9.09%.From 1990 to 2009,there are nine years that the floods do not exceed the warning stage that show that the reservoir has the great impact on the flood prevention after the water storage.The essay raises the countermeasure for the flood control in accordance with the changes of the rainwater conditions before and after the construction of the station.更多还原