Page 45 - 《水资源与水工程学报》2022年第4期
P. 45
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andheavyrainshowedadecreasingtrend,whereasthoseofmoderaterainandheavyrainshowedanin
creasingtrend.Theabruptchangesoflightrainydaysoccurredin2011and2016 ,whereasthoseofother
rainfallmagnitudesdidnotoccur.Duetothelowandflattopography,heavysummerprecipitation,high
waterlevelinriversoutsidethearea ,incompetentwaterconservancyprojects,etc.,theprobabilityof
waterlogginginthecountywasquitehigh,whichapproached67.5% inthelast40years,andtheinci
denceoflargescalewaterloggingwas30%.Dividingtheoccurrencerateoflargescalewaterloggingby
time ,theoccurrenceratewas50% inthefirst10years,30% inthemiddle10years,and20% inthe
rest20years.Thesignificantincreaseinriceplantingareafrom1990to2019wasthemainreasonforthe
decreaseintheincidenceduringthisperiod.Theresearchresultscanprovideacertainreferenceforflood
andwaterloggingcontrolfortheregionalfarmlands.
Keywords:characteristicsofrainfallinducedfloodandwaterlogging;rainfall;rainydays;incidenceof
waterlogging;SuibinCounty;theSanjiangPlain
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