?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F38162%2F&rft.title=An+Investigation+on+Interactions+between+Plant+Physiological-Hydrological-Biogeochemical+processes+and+Acid+Mine+Drainage+in+Coal+Refuse+Piles+using+Optimality+Principle+Theory&rft.creator=Clavijo+Sanabria%2C+Hector+William&rft.description=Human+civilization+has+changed+the+global+biogeochemical+cycles+since+last+century.+Carbon+and+nitrogen+cycles+have+been+affected+by+industrialization+and+by+disturbance+of+natural+vegetation+distribution+(i.e.+deforestation%2C+fires%2C+agriculture+and+mining).+As+one+of+the+pollution+processes%2C+Acid+Mine+Drainage+(AMD)+has+played+a+special+role+on+disturbances+on+water%2C+carbon+and+nitrogen+cycles.+The+study+of+this+role+is+the+main+part+of+analysis+in+the+present+dissertation.+More+specifically%2C+this+work+investigates+the+reciprocal+action+between+hydrological+and+biogeochemical+processes+after+coal+mines+disturbances+by+applying+a+comprehensive+mathematical+formulation+to+assess+the+effects+of+vegetation+as+passive+phytoremediation+on+AMD+in+two+coal+refuse+mines+using+an+optimal+plant+physiological+approach.%0D%0AThe+development+of+this+dissertation+has+resulted+in+the+following+findings%3A%0D%0A1)+The+optimality+formulation+developed+in+this+dissertation%2C+based+on+minimum+unit+cost+function%2C+could+be+extended+to+integrate+water-stress+conditions+in+a+more+constrained+manner+than+the+majority+of+optimal+formulations+presented+in+literature.+2)+The+strategy+of+having+as+many+as+possible+constraints+to+avoid+parameter+equifinality+has+been+a+point+paramount+significance+in+the+formulation+in+this+study.+3)+The+analysis+and+simulations+show+that+the+main+interactions+between+the+biogeochemical+processes+and+pyrite+oxidation+as+main+AMD+processes+are+driven+primarily+by+the+seasonally+plant+evapotranspiration+through+the+soil+moisture+variation%3B+the+effect+of+mineral+nitrogen+processes+and+organic+matter+oxidation+reducing+the+pH%3B+and+the+solute+plant+uptake+reducing+the+amount+of+concentrations.+4)+The+long-term+simulation+of+passive+bioremediation+with+grass+vegetation+has+shown+to+be+environmentally+efficient+only+in+the+amended+layer.+On+the+other+hand%2C+using+tree+vegetation+suggests+better+performance+to+reduce+solute+concentrations+and+increase+the+pH.+5)+The+solute+transport+simulations+make+possible+to+establish+an+estimation+of+the+autonomous+time+of+pollution+recovery+at+watershed+scales.+6)+Finally%2C+the+use+of+vegetation+as+passive+bio-remediation%2C+such+as+grass+or+tree+vegetation%2C+is+worth+in+terms+of+surface+water+quality.&rft.date=2020-07-30&rft.type=University+of+Pittsburgh+ETD&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fd-scholarship-dev.library.pitt.edu%2F38162%2F1%2F2020%2520hwclavijo_etd.pdf&rft.identifier=++Clavijo+Sanabria%2C+Hector+William++(2020)+An+Investigation+on+Interactions+between+Plant+Physiological-Hydrological-Biogeochemical+processes+and+Acid+Mine+Drainage+in+Coal+Refuse+Piles+using+Optimality+Principle+Theory.++Doctoral+Dissertation%2C+University+of+Pittsburgh.++++(Unpublished)++