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Mechanism analysisofgrassgrowinginGobiDesertinducedbytwo - way“potcovereffect”
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1
YAOYangping,SUNGuochao,WANGNaidong,DUANZhigang 2
(1.SchoolofTransportationScienceandEngineering,BeihangUniversity,Beijing 100191,China;
2.NavalResearchInstituteofPLA,Beijing 102202,China)
Abstract:TheGobiDesertinNorthwestChinaisabarrenlandwithanaridclimate.However,afterthecomple
tionoftheTaratanphotovoltaicpowerstation ,thereisaphenomenonofgrassgrowinginalargearea.Inthispa
per ,weexplorethepossiblesourcesofweedgrowthinPVpowerstation.Theinducedmechanismoftwo - way“pot
covereffect ”wasinitiallyinvestigatedfromaqualitativeperspective.Thetemperatureandmoisturepatternsofthe
shallowsoilatthreemeasurementpointsandtheatmospherewereanalyzedbycomparingthePVpanelareawiththe
non - PVpanelarea ,andasimplequantitativeanalysisoftheannualanddailycyclemoisturepatternsofthetwo -
way “potcovereffect”wasconducted.TheresultsshowthatthecombinedfactorsofPV panelsandhardened
groundcoverinducetwo - way “potcovereffect”.ThePVpanelscansignificantlyreducethesurfacetemperatureof
soilinsummer.Thepositive “potcovereffect”isdominantinwinterandspring,whichisthemainmoisturesup
plytomaintainthesurvivalofweedsintheshallowsoillayer,andtheannualcirculatingwaterincreasesbyabout
11%~20%.However ,thereverse“potcovereffect”isdominantinsummerandearlyautumn,whichensures
thatthedailymoisturedemandofweedsfluctuateswithinasmallrange.Therelevantresearchinthispapercanalso
providereferencefordesertsandcontrol.
Keywords:photovoltaicpowerstation;wildgrass;two - way“potcovereffect”;temperaturevariation;watervari
ation
(责任编辑:李 娜)
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