应用复方丹参滴丸治疗视网膜中央动脉阻塞.doc

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1、屏東平原地下水人工補注入滲阻塞模擬之研究■以萬隆人工湖為例CloggingEffectonGroundwaterArtificialRechargeinthePingtungPlain一AcasestudyatWanlongArtificiallake研究生：楊信凱Yang,Hsin-Kai指導教授：丁澈士Ting,Cheh-Shyh【摘要】本研究主要目的是為了解經由引取地面水灌注人工補注池後，分析補注池的入滲速度及地下水丘變化情況，進而探討其入滲的物理性細顆粒土壤阻塞礫石層孔隙而降低原有入滲速度，以及藻類所造成的生物聚集、膠狀物質對入滲阻塞所致之效應。再藉由MODFLOW數值模式模擬

2、物理性阻塞及生物性阻塞，對入滲速度的影響程度。物理性阻塞利用調整水力傳導係數的方式，來模擬阻塞對入滲速度、流場的影響;生物性阻塞則是將藻類所產生的膠狀物質反映在底層，以水力傳導係數做一參數來調整模擬。模擬的結果顯示，物理性阻塞的入滲速度10.09nVday,則是比前人試驗值(10.83m/day)的入滲速度折減了6.8%;物理性及生物性阻塞的入滲速度9.07nVday,則是比前人試驗值折減了16.3%。本研究驗證了阻塞確實對入滲速度有明顯的直接影響。關鍵字：地下水人工補注、阻塞、入滲速度、數值模式。[Abstract]Thepurposeofthisresearchistoobtain

3、ananalysisofthestateofchangesintheinfiltrationvelocityandgroundwatermoundoftherechargebasinbydrawingfromtheartificialrechargeofgroundwaterbasin.Tlieresultsoftheanalysiswillhelptodeterminetheeffectofreductionontheoriginalinfillrationvelocityduetothephysicalcloggingofthegapsinthegravellayerbyfined

4、-grainedsoilandtheeffectofthebiologicalcollectionofalgaeorganismsandgel-likesubstancesoninfiltrationclogging.TheMODFLOWnumericalmodelwasthenusedtosimulatetheextentofeffectoninfiltrationvelocityduetophysicalcloggingandbiologicalclogging.Themethodofadjustedpermeabilitywasusedtosimulatetheeffectofp

5、hysicalcloggingoninflltrationvelocityandflowfield.Asfortheeffectofbiologicalclogging,thegel-likesubstancesproducedbythealgaewasprojectedatthebottomlayerandsimulatedbytweakingwithpermeabilityasaparameterinthesimulation.Fromtheresultofthesimulation,theinfiltrationvelocityunderphysicalcloggingwasat

6、10.09ni/day;a6.8%reductionininflltrationvelocity,acombinationofbothphysicalandbiologicalcloggingyieldedaninfiltrationvelocityat9.07m/day,translatingto16.3%reductionininfiltrationvelocitycomparedtopreviousstudyresultsrespectively.Fromthesefindings,thisresearchhassuccessfullyshownthedirecteffectof

7、cloggingoninfillralionvelocity.Keywords:artificialrechargeofgroundwater,clogging,infiltrationvelocity,numericalmodel