Page 36 - 《水资源与水工程学报》2022年第4期
P. 36
!33 " ! 4 # & ' ( ) & * + , - Vol.33No.4
2022 $ 8 % JournalofWaterResources&WaterEngineering Aug.,2022
DOI:10.11705/j.issn.1672-643X.2022.04.05
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FGHIJ:TV697.3 9;X524 KLMNO:A KPQJ:1672643X(2022)04003208
Bestmanagementpracticesfornonpointsourcepollutionin
NishanReservoirbasedonSWATmodel
3
1
4
2
1
QULing,YUZhiqiang,HAOQiyong,SUNXiuling,YINErqin
(1.HydrologicalCenterofShandongProvince,Jinan250002,China;2.ShandongInstituteofCoalGeologicalExplorationand
Engineering ,Jinan250104,China;3.SchoolofCivilEngineering,ShandongUniversity,Jinan250061,China;4.Collegeof
WaterConservancyandCivilEngineering,ShandongAgriculturalUniversity,Taian271018,China)
Abstract:TopreventandcontrolthenonpointsourcepollutionintheNishanReservoirBasin,anestab
lishedandcalibratedSWATmodelwasutilizedtosimulatetheresultsofbestmanagementpractices
(BMPs),andtoanalyzethetemporalandspatialvariationcharacteristicsoftotalnitrogen(TN)andtotal
phosphorus (TP)reduction.Theresultsshowedthatthepracticesof50% reductionoffertilizeruse,ec
ologicalditch ,vegetationbufferzoneandreturningfarmlandtoforesthadasignificanteffectonthere
ductionofTNandTP,whichreducedtheTNandTPby48.22% and52.41%,36.86% and52.73%,
38.31% and51.00%,45.17% and38.53%,respectively.ThemaximumreductionofTNandTPby
BMPswasinwetperiod(JunetoSeptember);however,differentBMPshadgreateffectsonthespatial
distributionofTNandTPreduction.Accordingtothecurrentsituationinthebasin ,thecombinedprac
ticesof50% reductionoffertilizeruse ,ecologicalditchandvegetationbufferzoneshouldbeappliedto
highriskpollutionareaswithabundantfarmlands,largerainfallandsteepslopes;whereasthecombined
lowcostpracticesofreductionoffertilizeruseandcontourcultivationshouldbearrangedforlowriskpol
lutionareas.Moreover ,returningfarmlandtoforestshouldbeactivelycarriedout.
Keywords:nonpointsourcepollution;SWATmodel;bestmanagementpractices(BMPs);totalnitro
genandtotalphosphorusreduction;NishanReservoir
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