{"id":{"repo_id":"wvu","oai_identifier":"oai:researchrepository.wvu.edu:etd-1922"},"canonical_url":"https://search.dev.ndltd.org/etd/wvu/oai:researchrepository.wvu.edu:etd-1922","repository":{"repo_id":"wvu","name":"West Virginia University","base_url":"https://researchrepository.wvu.edu/do/oai/"},"display":{"title":"Recharge dynamics of a perched phreatic aquifer","abstract":"Numerous techniques were used to analyze recharge rates, timing, and mechanisms for a perched, phreatic aquifer. Recharge rates were estimated using fluid mass balance (FMB), integrated hydrograph separation (IHS), and innovative hydrograph manipulation techniques. Timing and mechanisms of recharge were analyzed using signal-processing and linear-system approaches. Hydrometeorologic and hydrologic data were collected for a 16-month period (4/97 to 8/98) using both manual and automated techniques. Precipitation totaled 135.6 cm and evapotranspiration (ET) calculated using the Penman-Monteith method totaled 107.5 cm. Recharge estimates from FMB ranged from 20.3% to 33.6%. Springflows were modeled using a stage-discharge cross-correlation method. Recharge estimates from IHS of these springflows ranged from 59.8% to 72.2% (significantly higher than FMB estimates).;Conventional well-stage hydrographs were corrected for spring discharge using cross-correlation relationships resulting in storage accumulation curves (SACs). Recharge estimates using SACs corresponded well to IHS estimates and ranged between 49.0% and 74.2%. These curves represent a potentially powerful technique for recharge estimation over short-scale intervals (days to weeks).;Modified storage accumulation curves (MSACs), based on the slope of the SAC, were used to analyze recharge timing and mechanisms. A linear groundwater system was identified relating precipitation to water-level fluctuations and four signal-processing techniques were used to develop kernel functions. These kernels revealed that a significant amount of recharge occurs on the same day as precipitation. They also showed that both macropore and matrix processes are at work in this system.","abstract_html":"Numerous techniques were used to analyze recharge rates, timing, and mechanisms for a perched, phreatic aquifer. Recharge rates were estimated using fluid mass balance (FMB), integrated hydrograph separation (IHS), and innovative hydrograph manipulation techniques. Timing and mechanisms of recharge were analyzed using signal-processing and linear-system approaches. Hydrometeorologic and hydrologic data were collected for a 16-month period (4/97 to 8/98) using both manual and automated techniques. Precipitation totaled 135.6 cm and evapotranspiration (ET) calculated using the Penman-Monteith method totaled 107.5 cm. Recharge estimates from FMB ranged from 20.3% to 33.6%. Springflows were modeled using a stage-discharge cross-correlation method. Recharge estimates from IHS of these springflows ranged from 59.8% to 72.2% (significantly higher than FMB estimates).;Conventional well-stage hydrographs were corrected for spring discharge using cross-correlation relationships resulting in storage accumulation curves (SACs). Recharge estimates using SACs corresponded well to IHS estimates and ranged between 49.0% and 74.2%. These curves represent a potentially powerful technique for recharge estimation over short-scale intervals (days to weeks).;Modified storage accumulation curves (MSACs), based on the slope of the SAC, were used to analyze recharge timing and mechanisms. A linear groundwater system was identified relating precipitation to water-level fluctuations and four signal-processing techniques were used to develop kernel functions. These kernels revealed that a significant amount of recharge occurs on the same day as precipitation. They also showed that both macropore and matrix processes are at work in this system.","abstract_has_math":false,"creators":["Ketchum, Joseph Neil, Jr."],"institution":null,"degree_name":"MS","degree_level":"Thesis","degree_discipline":"Geology and Geography","degree_department":null,"school":null,"contributors":["Joseph J. Donovan."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1998,"date_issued":"1998-12-01T08:00:00Z","date_published":"1998-12-01T08:00:00Z","updated_at":"2026-07-24T06:15:01Z","subjects":["Geology","Hydrologic sciences"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://researchrepository.wvu.edu/etd/919"],"render_values":[{"text":"https://researchrepository.wvu.edu/etd/919","href":"https://researchrepository.wvu.edu/etd/919","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.33915/etd.919","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Joseph J. 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Recharge rates were estimated using fluid mass balance (FMB), integrated hydrograph separation (IHS), and innovative hydrograph manipulation techniques. Timing and mechanisms of recharge were analyzed using signal-processing and linear-system approaches. Hydrometeorologic and hydrologic data were collected for a 16-month period (4/97 to 8/98) using both manual and automated techniques. Precipitation totaled 135.6 cm and evapotranspiration (ET) calculated using the Penman-Monteith method totaled 107.5 cm. Recharge estimates from FMB ranged from 20.3% to 33.6%. Springflows were modeled using a stage-discharge cross-correlation method. Recharge estimates from IHS of these springflows ranged from 59.8% to 72.2% (significantly higher than FMB estimates).;Conventional well-stage hydrographs were corrected for spring discharge using cross-correlation relationships resulting in storage accumulation curves (SACs). Recharge estimates using SACs corresponded well to IHS estimates and ranged between 49.0% and 74.2%. These curves represent a potentially powerful technique for recharge estimation over short-scale intervals (days to weeks).;Modified storage accumulation curves (MSACs), based on the slope of the SAC, were used to analyze recharge timing and mechanisms. A linear groundwater system was identified relating precipitation to water-level fluctuations and four signal-processing techniques were used to develop kernel functions. These kernels revealed that a significant amount of recharge occurs on the same day as precipitation. They also showed that both macropore and matrix processes are at work in this system."]},{"key":"dc:title","label":"Title","values":["Recharge dynamics of a perched phreatic aquifer"]}]}],"canonical_facts":{"dc:contributor":["Joseph J. Donovan."],"dc:creator":["Ketchum, Joseph Neil, Jr."],"dc:date.available":["2019-01-17T08:00:00Z"],"dc:description.abstract":["Numerous techniques were used to analyze recharge rates, timing, and mechanisms for a perched, phreatic aquifer. Recharge rates were estimated using fluid mass balance (FMB), integrated hydrograph separation (IHS), and innovative hydrograph manipulation techniques. Timing and mechanisms of recharge were analyzed using signal-processing and linear-system approaches. Hydrometeorologic and hydrologic data were collected for a 16-month period (4/97 to 8/98) using both manual and automated techniques. Precipitation totaled 135.6 cm and evapotranspiration (ET) calculated using the Penman-Monteith method totaled 107.5 cm. Recharge estimates from FMB ranged from 20.3% to 33.6%. Springflows were modeled using a stage-discharge cross-correlation method. Recharge estimates from IHS of these springflows ranged from 59.8% to 72.2% (significantly higher than FMB estimates).;Conventional well-stage hydrographs were corrected for spring discharge using cross-correlation relationships resulting in storage accumulation curves (SACs). Recharge estimates using SACs corresponded well to IHS estimates and ranged between 49.0% and 74.2%. These curves represent a potentially powerful technique for recharge estimation over short-scale intervals (days to weeks).;Modified storage accumulation curves (MSACs), based on the slope of the SAC, were used to analyze recharge timing and mechanisms. A linear groundwater system was identified relating precipitation to water-level fluctuations and four signal-processing techniques were used to develop kernel functions. These kernels revealed that a significant amount of recharge occurs on the same day as precipitation. They also showed that both macropore and matrix processes are at work in this system."],"dc:identifier":["https://doi.org/10.33915/etd.919","https://researchrepository.wvu.edu/etd/919"],"dc:subject":["Geology","Hydrologic sciences"],"dc:title":["Recharge dynamics of a perched phreatic aquifer"],"thesis:degree_discipline":["Geology and Geography"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["MS"]},"updated_at":"2026-07-24T06:15:01Z"}