CAJ | 학술논문

以赣江流域现有最大水利工程万安水电站（水库）运行前后区分水利工程的影响时段，以赣江下游外洲水文站多年（1955－2011年）逐日流量为依据，在M K突变检验、滑动 t突变检验的基础上，运用水文变异指标法和变化范围法（IHA／RVA）分析大型水库工程影响下的枯水变异特征。研究发现，赣江流域在1955－2011年，自万安水电站1990年正式运营之后，最小1、3、7、30、90 d日平均流量的偏离率均显著上升，前4者的幅度均超过了24％。I H A的最小各日平均流量极值变化在中RVA范围尽管均属于低度改变，然而在低RVA范围内5个指标都达到了高度改变，由此充分揭示了对河流生态系统至关重要的低流量范围内多个枯水情势高改变度的存在，为水库生态调度和河流生态保护提供了有益的参考。
이공강류역현유최대수리공정만안수전참（수고）운행전후구분수리공정적영향시단，이공강하유외주수문참다년（1955－2011년）축일류량위의거，재M K돌변검험、활동 t돌변검험적기출상，운용수문변이지표법화변화범위법（IHA／RVA）분석대형수고공정영향하적고수변이특정。연구발현，공강류역재1955－2011년，자만안수전참1990년정식운영지후，최소1、3、7、30、90 d일평균류량적편리솔균현저상승，전4자적폭도균초과료24％。I H A적최소각일평균류량겁치변화재중RVA범위진관균속우저도개변，연이재저RVA범위내5개지표도체도료고도개변，유차충분게시료대하류생태계통지관중요적저류량범위내다개고수정세고개변도적존재，위수고생태조도화하류생태보호제공료유익적삼고。
Based on daily runoff data from 1955 to 2011 in the Waizhou Station of the lower Ganjiang River over the years ,there are two stages according to the starting time of Wan'an Hydropower Station(reservoir) ,this paper investigates the hydrological variation of low flow .Influenced by the existing largest water conservancy project in the Ganjiang River Basin by abrupt change detection methods(Mann-Kendall trend detection method ,Moving t test method) ,and IHA(Indicators of Hydrologic Alteration) method and RVA (Range of Variability Approach) method .The results show that :1990-2011 versus 1955-1989 ,the deviation ratio of minimum of 1 ,3 ,7 ,30 ,90 days ,each of the former 4 items were more than 24% .For the extreme variation of minimal daily average runoffs in IHA-1 ,3 ,7 ,30 ,90 days ,each of them showed a high degree variation in the low RVA range ,although they all belonged to a low degree variation in the middle RVA range .The research revealed the existence of a high degree variation of a low flow ,which is critical for the river ecosystem under the influence of large hydraulic engineering in the the Ganjiang River Basin ,which provides a useful reference for the ecological operation of reservoirs and river ecosystem protection .