Page 29 - 《水资源与水工程学报》2022年第4期
P. 29
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37.83% respectively,andtheoccurrencetimewas21daysahead.Itisfoundthatrainfallwaspositively
correlatedwithdischargewithgreatsignificance ,sotheannualdecreaseofrainfallhadseriouslyaffected
thedischarge.Inaddition,thevariationofhydrologicalregimesiseasilyaffectedbyPengshuiHydropow
erStation.However ,theimpactofthehydrologicalregimechangeandreducedflowonfishisacumula
tiveprocess,thespawningscaleofthe12driftingfishspeciesstartedtodecreasefrom 2009,then
droppeddramaticallyin2011,whichwasonlyaccountedfor15,416,900eggs.Thesefindingscanpro
videareferenceforthestudyofhydrologicalregimechangeprocessoftheWujiangRiverandtheformula
tionofwaterecologicalrestorationmeasures.
Keywords:hydrologicchangedegree;hydrologicalregime;IHA-RVAmethod;fishchange;theWu
jiangRiver
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