Dissertations / Theses on the topic 'Baseflow'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 47 dissertations / theses for your research on the topic 'Baseflow.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Ng, Nicole. "Spatiotemporal variations of baseflow generation in the United States." Thesis, State University of New York Col. of Environmental Science & Forestry, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10192876.
Full textThe traditional paradigm of baseflow generation assumes a uniform water table contributes baseflow evenly across a watershed. This thesis considers an alternate paradigm in which baseflow originates from a mix of localized sources that drain at different rates. Four forested headwater catchments across the United States were examined for spatial variability in baseflow sources by analyzing fractional baseflow contribution from each subcatchment relative to the catchment outlet. This revealed that subcatchment flow contributions changed dynamically through time, supporting the idea of different drainage rates in different places. A parallel linear reservoir model, which is predicated on heterogeneity in flow sources and not groundwater hydraulics, was used to simulate results consistent with observations in some of the study catchments. These results support the idea that in some locations baseflow recession may be better explained by landscape spatial heterogeneity than by aquifer hydraulics.
Baillie, Matthew Nelson. "Quantifying baseflow inputs to the San Pedro River a geochemical approach /." Thesis, The University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_2005_019_sip1_w.pdf&type=application/pdf.
Full textThorsell, Anna. "Drainage of flooded water : effects on baseflow in Awanui Stream, New Zealand." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-169200.
Full textI området Heretaunga Plain, Nya Zeeland, översvämmas årligen delar av det låglänta området kring floden Awanui Stream. Syftet med den här studien var att ta reda på om översvämningsvattnet i fält hindras från infiltration i jorden på något sätt (och kan där med inte bidra till basflödet till floden). Vad skulle effekterna på basflödet i floden bli om översvämningsvattnet pumpades direkt ut i floden efter våtare perioder och större regn? Metoden för att svara på detta var att undersöka infiltrationen, jordtyperna och grundvattenförhållandena i fält. Infiltrationen undersöktes med hjälp av dubbelring infiltrationstest, en s.k. disc permeameter användes för att undersöka den hydrauliska konduktiviteten och PVC-rör med borrkärnor ställdes under vattenmättadeförhållanden en längre tid för att ta reda på om infiltrationen då skulle förändras. Jorden i fält provtogs och ett kornstorlekstest utfördes. Den potentiella avdunstningen mättes med en evaporationspanna och beräknades med data från en klimatstation i fält. Med flödesdata från diket med utgående vatten, potentiell avdunstning och nederbördsdata kunde en grov uppskattning av vattenbalansen i fält göras. Resultaten visade att det inte bildas någon hinna som hindrar infiltrationen av vatten i den övre delen av jordprofilen. Översvämningen är ett resultat av en stigande grundvattenyta, som stiger från ett tjockt lager av lera 7 meter ner i marken. När vattnet har dräneras och avdunstat bort är det ingenting som hindrar infiltrationen i fält. Det är dock väldigt fina partiklar av silt och lera i den översta torvjorden som minskar infiltrationshastigheten och kan orsaka en separation av grundvatten över och under markytan. När projektet var avslutat kunde två rekommendationer ges till landägaren om hur man kan lösa problemet med översvämningen. Rekommendationerna var att antingen skulle landägaren kunna göra om marknivån i fält för att få ytvattnet att rinna av mot dikena istället för att vara fast i de lägre partierna av fältet. Eller att gräva diken in i fältet från Horonui Drain och Cambell Drain in till de lägre översvämmade områdena i fält för att dränera bort översvämningsvattnet.
Neary, Daniel G., and John N. Rinne. "Baseflow Trends in the Upper Verde River Relative to Fish Habitat Requirements." Arizona-Nevada Academy of Science, 1997. http://hdl.handle.net/10150/296476.
Full textHidayat, Noor 1952. "Baseflow evaluation of a logged small watershed of the Bull Run River, Oregon." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/278028.
Full textRoningen, Jeanne Marie. "Hydrogeologic Controls on Lake Level at Mountain Lake, Virginia." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/31950.
Full textA daily water balance, geophysical surveying with dipole-dipole electrical resistivity, and chemical sampling have shed light on the nature of flow to and from the lake, including: 1) the steady nature of net groundwater outflow, 2) the seasonal response to precipitation of a forested first-order drainage system in fractured rock, 3) the influence of a fault not previously discussed in literature regarding the lake, and 4) the possibility of flow pathways through karst features.
Results from a water balance indicate steady lake drainage and significant recharge when vegetation is dormant, particularly during rain-on-snow melt events. The resistivity profiles display a highly heterogeneous subsurface and reveal low-resistivity areas that suggest flow pathways to and from the lake. Well logs, satellite images, and outcrop observations appear to confirm the presence of a fault to the east of the lake. Chemical evidence suggests that karst features may be present in the upper Reedsville-Trenton formation underlying the lakebed.
Master of Science
Simpson, Scott. "Modeling Stream-Aquifer Interactions During Floods and Baseflow: Upper San Pedro River, Southeastern Arizona." Thesis, The University of Arizona, 2007. http://hdl.handle.net/10150/193338.
Full textSchulte, Marc Alan. "Dilution Gauging as a Method to Quantify Groundwater Baseflow Fluctuations in Arizona's San Pedro River." Thesis, The University of Arizona, 1997. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_etd_hy0133_sip1_w.pdf&type=application/pdf.
Full textShukla, Sanjay. "Impacts of Best Management Practices on Nitrogen Discharge From a Virginia Coastal Plain Watershed." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29928.
Full textPh. D.
Cameron, Stewart Graham. "A hydrogeological study of the interaction between Avon River baseflow and shallow groundwater, Christchurch, New Zealand." Thesis, University of Canterbury. Geology, 1992. http://hdl.handle.net/10092/8023.
Full textWilson, Chantel. "Effect of Golf Course Turfgrass Management on Water Quality of Non-tidal Streams in the Chesapeake Bay Watershed." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51683.
Full textPh. D.
Neurath, Robert Carl. "Comparative Baseflow Hydrochemistry of Various Septic System Density Groups within the Yellow River Watershed, Gwinnett County, Georgia." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/geosciences_theses/9.
Full textCrites, Hugo. "Distribution of Icings (Aufeis) in Northwestern Canada: Insights into Groundwater Conditions." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39733.
Full textDonelan, Jack E. "Groundwater-Surface Water Interaction in the Kern River| Estimates of Baseflow from Dissolved Radon Analysis and Hydrograph Separation Techniques." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10841176.
Full textGeochemical mixing methods utilizing 222Rn and chloride and statistical hydrograph separation techniques were carried out in an attempt to understand baseflow dynamics in a section of the Kern River in the Sierra Nevada of Southern California. 222Rn has become a valuable tool for evaluating groundwater inflow to a river, particularly when groundwater and surface water have similar major ion geochemistry. When using geochemical methods it is important to minimize uncertainty through comparison with separate tracers and techniques, though this is complicated in this setting. Snow melt discharge and regulation of natural river flow cause hydrograph-based techniques to suffer from inaccuracies. Geochemical mixing using major ions and stable isotopes are complicated by the chemical similarity between surface water and groundwater. 222Rn is a powerful tool to elucidate this relationship in this setting if major uncertainties, like rate of radon degassing and parafluvial and hyporheic radon production can be constrained.
Beaulieu, Mathieu. "A shifting hydrological regime : a field investigation of snowmelt runoff processes and their connection to summer baseflow, Sunshine Coast, B.C." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/31299.
Full textIvkovic, Karen Marie-Jeanne, and kardami@optusnet com au. "Modelling Groundwater-River Interactions for Assessing Water Allocation Options." The Australian National University. Centre for Resources, Environment and Society, 2007. http://thesis.anu.edu.au./public/adt-ANU20080901.134545.
Full textCimino, Joseph A. "Empirical mass balance calibration of analytical hydrograph separation techniques using electrical conductivity." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000213.
Full textRinaldi, Parisa N. "Relationships Between Landscape Features and Nutrient Concentrations in an Agricultural Watershed in Southwestern Georgia: An Integrated Geographic Information Systems Approach." Digital Archive @ GSU, 2013. http://digitalarchive.gsu.edu/geosciences_theses/59.
Full textCimino, Joseph A. (Joseph Anthony). "Empirical mass balance calibration of analytical hydrograph separation techniques using electrical conductivity [electronic resource] / by Joseph A. Cimino." University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000213.
Full textDocument formatted into pages; contains 75 pages.
Thesis (M.S.C.E.)--University of South Florida, 2003.
Includes bibliographical references.
Text (Electronic thesis) in PDF format.
ABSTRACT: Analytical baseflow separation techniques such as those used in the automated hydrograph separation program HYSEP rely on a single input parameter that defines the period of time after which surface runoff ceases and all streamflow is considered baseflow. In HYSEP, this input parameter is solely a function of drainage basin contributing area. This method cannot be applied universally since in most regions the time of surface runoff cessation is a function of a number of different hydrologic and hydrogeologic basin characteristics, not just contributing drainage area. This study demonstrates that streamflow conductivity can be used as a natural tracer that integrates the different hydrologic and hydrogeologic basin characteristics that influence baseflow response. Used as an indicator of baseflow as a component of total flow, streamflow conductivity allows for an empirical approach to hydrograph separation using a simple mass balance algorithm.
ABSTRACT: Although conductivity values for surface-water runoff and ground-water baseflow must be identified to apply this mass balance algorithm, field studies show that assumptions based on streamflow at low flow and high flow conditions are valid for estimating these end member conductivities. The only data required to apply the mass balance algorithm are streamflow conductivity and discharge measurements. Using minimal data requirements, empirical hydrograph separation techniques can be applied that yield reasonable estimates of baseflow. This procedure was performed on data from 10 USGS gaging stations for which reliable, real-time conductivity data are available. Comparison of empirical hydrograph separations using streamflow conductivity data with analytical hydrograph separations demonstrates that uncalibrated, graphical estimation of baseflow can lead to substantial errors in baseflow estimates.
ABSTRACT: Results from empirical separations can be used to calibrate the runoff cessation input parameter used in analytical separation for each gaging station. In general, collection of stream conductivity data at gaging stations is relatively recent, while discharge measurements may extend many decades into the past. Results demonstrate that conductivity data available for a relatively short period of record can be used to calibrate the runoff cessation input parameter used for analytical separation. The calibrated analytical method can then be applied over a much longer period record since discharge data are the only requirement.
System requirements: World Wide Web browser and PDF reader.
Mode of access: World Wide Web.
Spahr, Rachel Elizabeth. "Influence of Land Cover, Stream Discharge, and Waste Water Effluent on Suspended Sediment and Nutrient Concentrations in Southwest Ohio Streams." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1561841165531563.
Full textBaloochestani, Farshad. "Estimation of Hydraulic Properties of the Shallow Aquifer System for Selected Basins in the Blue Ridge and the Piedmont Physiographic Provinces of the Southeastern U.S. Using Streamflow Recession and Baseflow Data." Digital Archive @ GSU, 2008. http://digitalarchive.gsu.edu/geosciences_diss/2.
Full textKitheka, Bernard M. Mr. "INVENTORY OF STORMWATER MANAGEMENT PRACTICES IN THE CITY OF OXFORD, OHIO." Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1274732505.
Full textBeduschi, Carlos Eduardo. "Caracterização isotópica dos componentes do ciclo hidrológico em quatro sub-bacias pertencentes à bacia do Rio Piracicaba (SP)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-14082008-103438/.
Full textThis project had the objective to investigate the oxygen (?18O) and hydrogen (?D) isotopic variation of shallow unconfined aquifers in four regions, in transects defined from the river to the limit of the drainage area. The transects were established within a topographical gradient in four sub-catchments of the Piracicaba river hydrographic basin. The population in this basin is almost three and a half millions inhabitants and an economy based on agriculture and industry is responsible for about 10% of the total Brazilian gross production. Based on a well documented isotopic variation of rainwater and river water done previously (Martinelli et al. 2004), where data seasonality and a possible variation related to water use in urban areas were identified, the studies were extended to the groundwater (baseflow) sources to the major channel (Piracicaba river) of the basin. The seasonality defined by a wet summer (november - april) and a dry winter (may - september) was covered with monthly (end of dry season of 2005; rainy season of 2005-2006 and dry season of 2006) and every two weeks sampling (rainy season 2006-2007) of rain water, shallow wells, springs and surface water (rivers) that drain the studied sub-basins. The ?18O and ?D individual values of composite precipitation in the studied sub-areas presented higher variation (extreme values; mean ?18O from -0,4 to -13,0? ) when compared to the values found for surface water (mean ?18O from -5,1 to -9,2? ) and groundwater (wells and springs; mean ?18O from -6,9 a -7,1? ), being the values of groundwater almost constant within the studied period. Precipitation and baseflow have relative different isotopic composition of ?18O, once the weighted average of precipitation (-8,6? observed for the whole studied period) is different from the average values found for unconfined groundwater (-7,0? in average). Values of surface runoff to the main channel (Piracicaba river) were similar to those found in precipitation in the rainy season (presenting variations within this period), otherwise, the isotopic signals of surface water were rather more similar to those found in baseflow, characterizing the contribution of baseflow in the lower flows. However, average value of ?18O of all rivers and streams studied (-5,7? ) were about 1,2? more enriched than the average value of wells and springs (-6,9? ) in the dry season. The amplitudes of ?18O found in precipitation and groundwater were used as a first aproximation to estimate mean residence time of unconfined groundwater.
Mingoti, Rafael. "Efeitos da espacialização da cobertura florestal e da profundidade dos solos na produção de água de uma bacia hidrográfica." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11143/tde-25102012-090126/.
Full textSeveral works related to the theme of water production are being made, having in common the association of forest cover with runoff in watersheds. However, no studies were found where the places where this land cover has optimum effect, because it is dependent on climatic and physiographic conditions of each watershed. The objective of this study is to evaluate changes in water yield caused by the spatial distribution of forest cover in relation to the shallow soils in a watershed. The studies were conducted in the watershed \"Ribeirão dos Marins\" in Piracicaba, SP, Brazil, through the hydrologic modeling using the distributed model GSSHA. For calibration were used data of meteorological, rainfall and stream flow to the years 1999 and 2000, in addition of the hydraulic conductivity and soil water retention curve obtained in laboratory. SPT tests and water infiltration tests were conducted to determine the thickness of the soils and hydraulic conductivity of the saturated zone (water table) in the watershed. The thickness of the soil was represented by a numerical model, based on those thicknesses measures and the model HAND. The depth of the water table was represented by another numerical model, drawn from the soil thickness and depth of field measured. A new methodology that estimates the Manning coefficient from the CN coefficient was used with satisfactory results. In the processes of calibration and validation of the model, the coefficients showed adequate correlation indexes. Hydrological simulations were made for 15 years in three land cover and land use scenarios, which have been prepared in order to compare the same area of forest cover in different positions of the basin, due to the presence of shallow soils near watercourses. Were analyzed, among the scenarios simulated for the entire period: total flow and baseflow; parameters of hydrographs (in selected events of the series); position of the water table, available water content; and flow duration curves. The results showed that in the study area there is no influence of the position of forest cover in relation to shallow soils to the water yield. Because there are few studies that address the effect of the location of forest cover in water yield is encouraged to conduct further research, among other reasons, for the determination of the priority sites to the reforestation in environmental conservation programs.
Drury, Travis Daniel. "Managing a Watershed Inventory Project and Exploring Water Quality Data in the Four Mile Creek Watershed." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1366318507.
Full textKarlsson, Johan, and Hannes Öckerman. "Föroreningar från gata till å : Utvärdering av beräkningsmetod för föroreningsbelastningfrån dagvatten genom en fallstudie i Uppsala." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-277033.
Full textWe live in a society with an ongoing urbanization. New development projects anddensifications in urban areas contribute to reduced infiltration and evapotranspiration and anincreased surface runoff from rain and melt water, i.e. stormwater. It is essential to quantifythis diffuse source of pollution in urban environments since nutrients, heavy metals and otherpollutants, are transported by the stormwater and contribute to recipient degradation. Anutrient pollution load model in stormwater is used by Swedish environmental emission data(SMED) on a national level. The SMED computational method utilizes empirical runoffcoefficients and standard concentrations, which vary depending on the catchment land-use. Flow proportional sampling of total concentrations of nitrogen, phosphorus, lead, copper,zinc, cadmium and suspended solids was conducted during nine weeks in one of the largeststormwater catchments in Uppsala city, Sweden. The study aimed at quantifying the pollutionload of the catchment in order to evaluate and suggest improvements to the SMEDcomputational method, which contains large uncertainties according to previous studies.Furthermore, the study aimed at providing a basis for potential treatment measures in thecatchment. The sampling was complemented with a model evaluation where the sensitivity ofthe computational method was tested with respect to land-use input and the inclusion ofbaseflow. The model evaluation also included a comparison with a more physically basedmodel for nutrient transport in natural catchments. The results revealed that lead, copper and zinc are discharged into the Fyris River inconcentrations exceeding proposed regional guideline values. For copper and zinc the totalpollution loads on the recipient are higher than previously modeled values. As heavy metalsand phosphorus are transported largely in particulate form the potential treatment measureshould have the ability to effectively separate particulate matter from the stormwater matrix.Due to emissions of large volumes of cooling and regeneration water from the industry GEHealthcare Bio-Sciences AB, the stormwater pollutants are diluted. The treatment measureshould therefore be placed upstream from the industry. When applying the SMED computational method on the studied catchment, the modeloverestimated the runoff volume from stormwater compared to the sampling results, while theaverage nitrogen concentration was underestimated. Regarding phosphorus concentrations,the model and the sampling results concurred relatively well. This resulted in a higherphosphorus, but lower nitrogen, pollution load predicted by the model. It can partly beattributed the fact that baseflow transport of nitrogen is a significant part of the total pollutionload, and should thus be included in the SMED computational method in future calculations.Another model improvement would be to replace the outdated land-use map currently beingused in the method as the model evaluation indicated a relatively large sensitivity in theresults with regards to alterations in the land-use type input.
Bexiga, Anabela da Coceição Rosado. "Qualification of affluent loads to Alqueva-Pedrogão system." Master's thesis, Universidade de Évora, 2008. http://hdl.handle.net/10174/18349.
Full textIlahee, Mahbub. "Modelling Losses in Flood Estimation." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16019/.
Full textIlahee, Mahbub. "Modelling Losses in Flood Estimation." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16019/1/Mahbub_Ilahee_Thesis.pdf.
Full textHuntington, Justin L. "Evapotranspiration from Irrigated Agriculture and Phreatophyte Shrubs in Nevada, and Role of Surface and Groundwater Interactions on Projected Baseflows in Snow Dominated Regions." UNIVERSITY OF NEVADA, RENO, 2012. http://pqdtopen.proquest.com/#viewpdf?dispub=3490766.
Full textCausse, Jean. "Temporalité des transferts de nutriments dans les bassins versants à algues vertes." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1B012/document.
Full textIn Brittany (Western France), "green tides" are recurrent since the early 70s and have an important place in public debate in health, political and economic terms. In this thesis, a wide bibliographic review was performed on the export of nitrogen, and an innovative methodology has been set up to study the spatial and temporal variability of nutrient export in two coastal watersheds on an intra-annual basis and during extreme events (rainfall events, tourist periods of low water, ...). Watersheds selected for the field experiments are Ic and Frémur (Côtes d'Armor). 3 types of experiments were performed on these watersheds: 1) Campaigns of grab samples by dry and wet weather (32 stations, 27 campaigns); 2) automatic sampling during floods (3 stations, 8 floods); and 3) high frequency measurement (2 stations, continuous). Conventional hydrological and physicochemical parameters, suspended solids, UV spectra and all forms of macronutrients (carbon, nitrogen, phosphorus) were analyzed during these experiments. The results confirm in part a number of results of the literature. Furthermore, it highlights the relationship carbon / nitrates far little studied at different spatial and temporal scales and during rainfall events, which however seems to be crucial in understanding of nitrate export. Finally, the analysis of all forms of nutrients reveals the importance of particulate forms from soil erosion. These results raise many research questions that merit further development in order to improve knowledge on nutrient transfers in watersheds and prioritize remediation actions. The prospects of this work are both scientific and practical. At the scientific level, research efforts on the relationship carbon / nitrate and identification of the assimilable fraction of organic carbon by denitrifying organisms must be continued. Similarly, the knowledge on nutrient export must be improved through the precise identification of particulate nutrient sources during the spring floods. On a practical level, it should contribute to the improvement of agricultural practices, the recognition of the interest of natural wetlands and improvement of the types of treatment used by treatment plants. The results obtained in this study should in particular be linked to the dynamics of nutrients in the foreshore observed during the development of green algae. Finally, an effort to improve access to certain types of data on watersheds is needed to improve understanding of nutrient transfers
Liu, Hong-Yi, and 劉宏毅. "Baseflow separation using EEMD." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/2qzc56.
Full text國立臺北科技大學
土木與防災研究所
102
Hydrograph representative the sum of two parts-the direct runoff and the baseflow. The direct runoff is formed by a super majority of rainfall infiltration is the primary cause of floods. The baseflow in the river flow is discharged from the drought conditions. The relationship between the hydrological characteristics of river basin and various types of hydrological disasters are very close. Therefore, understanding the hydrological characteristics of the Taiwan’s rivers, and the factors that affect the hydrologic characteristics of Taiwan, is the key to understanding all kinds of hydrological disasters of Taiwan. Taiwan is located at subtropical climate, and between the world''s largest land and largest ocean, the monsoon climate is extremely significant. It’s hot and rainy in summer, and abundant rainfall. However it’s very drought in winter, that makes the gap of Taiwan rivers is enormous between flow and dry season. Different from the past by using empirical mode as the method of baseflow separation, these methods are either too subjective, or non-physical concepts, or inconsistent with the actual hydrological conditions. This study compare the difference between traditional method of base flow separation method, and by using EEMD (Ensemble Empirical Model Decomposition) as the base flow separation in the rainstorm season. We study the flow data of two rivers in northern Taiwan- the Peishih River – Siyuan bridge and Daiyujue River – Dalin bridg. In order to solve the problem of mode mixing, We use the Ensemble Empirical Model Decomposition (EEMD) as a tool for the separation of base flow. If it can be effectively utilized EEMD as the base flow separation in the future, it will be able to do the base flow separation analysis in objectively possessed and physical sense way. It can be a great help both in academic theory or in engineering practices.
Hong, Nien-Ming, and 洪念民. "Study of Evapotranspiration and Baseflow Characteristics." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/85646269532534715370.
Full text國立臺灣大學
生物環境系統工程學系暨研究所
92
The conceptual models always are used to evaluate the impacts of climate change and climate variation in water resources. Even less parameters in conceptual model are positive, the description of physical become indistinct. For this reason, the study is involved in discussing conceptual models, evapotranspiration and baseflow in watershed. The vertical layers of each conceptual model, often used in hydrology simulation, are compared. The mechanisms of hydrological components in models are discussed. The study of evapotranspiration is to establishment of the conversion coefficients by measuring soil water content in daily time step. Cover coefficient and soil water resistance are included in conversion coefficient. It results that the soil water resistance happens under 35% water content and the cover coefficient is 2.57 in the watershed. On baseflow analysis, a new equation describing the relationship between three successive mean baseflows was derived in this study. There is no time dependent variable, as ground water table and the time of recession. Only a geohydrology parameter is in our equation. Furthermore, nonlinear storage can be describe the decay of baseflow as our equation. Because our equation is developed from groundwater governing equations, the lieanr storage of baseflow in conceptual model can be replaced by nonlinear storage.
Chuan-Shun, Yan, and 顏川舜. "Baseflow-Storage Relationships for Small Forest Watersheds." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/08205284278674602513.
Full text國立中興大學
水土保持學系
87
The purpose of this study is to derive relationship between baseflow and storage during dry season for evaluating storage characteristics of watersheds. This study applied linear and curvilinear regression equations to analyze the relationship between daily discharges and storage capacity of Lienhuachi #3, #4, and #5 experimental watersheds of Taiwan Forestry Research Institute in central Taiwan. The results indicated that curvilinear regression equation fitted better for these small and wet watedsheds.The equation between baseflow and storage estimated by curvilinear method in 1981 and 1983 are described as follows: (1) Lienhuachi No.3 experimental watershed Q=0.009837S1.523 (1981) Q=0.010954S1.405 (1983) (2) Lienhuachi No.4 experimental watershed Q=0.000450S2.107 (1981) Q=0.000203S2.258 (1983) (3) Lienhuachi No.5 experimental watershed Q=0.004241S1.727 (1981) Q=0.004853S1.624 (1983) Interception and transpiration will decrease after clearcutting, and watershed storage increase.
Hughes, Gregory Owen. "An analysis of baseflow recession in the Republic of South Africa." Thesis, 1997. http://hdl.handle.net/10413/5416.
Full textThesis (M.Sc.)-University of Natal, Pietermaritzburg, 1997.
Martin, Leslie Ann. "Baseflow turbidity of tributaries to the upper Little Tennessee River, North Carolina and Georgia." 2008. http://purl.galileo.usg.edu/uga%5Fetd/martin%5Fleslie%5Fa%5F200805%5Fms.
Full textYeh, Yaochun, and 葉耀駿. "A Study on Annual Baseflow Amounts from Small to Medium Sized Headwaters Watersheds in Taiwan." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/80634028644411028636.
Full text國立中興大學
水土保持學系
89
ABSTRACT Groundwater accounts for an important portion of usable water resources. . The objective of this study is to determine the baseflow amount and baseflow index for selected headwaters streams in Taiwan and to derive regression relationships for estimation of baseflow amounts. For discussion purposes, this study partitions Taiwan into four zones (North,Central,South,and East). Based on 39 streamflow data in Taiwan, the results of analyses show that annual baseflow index and value of a given stream generally have little variation (±10%). The variations between streams may be related factors such as elevation、and precipitation,geology and soil texture,vegetation coverage and human development ,uniform of precipitation and evaporation amount. This study derives two baseflow estimation relationships respectively for east and west parts of Taiwan. Eastern Taiwan, Y=0.245*X0(5.076)*X8(1.191)*X9(6.871)*X15(1.687) , Western Taiwan,Y=6.353*X05.623*X81.472*X99.1201*X150.470 (Y:annual baseflow; X0:annual streamflow; X8:watershed average slope;X9:the ratio of relief; and X15:the drainge density of river network) Keywords: base flow, streamflows,baseflow index,multiple regression model,topographic factors.
Hill, T. Chee. "Land Cover Change Impacts on Multidecadal Streamflow in Metropolitan Atlanta GA, USA." 2017. http://scholarworks.gsu.edu/geosciences_theses/98.
Full textLi, Li. "Frameworks for evaluating and improving simplified hydrologic models for baseflow and rainfall-runoff estimation using distributed physical models." Thesis, 2013. http://hdl.handle.net/2440/95235.
Full textThesis (Ph.D.) -- University of Adelaide, School of Civil, Environmental and Mining Engineering, 2013
Zimmerman, Guy Thomas. "Comparison of Baseflow-Stormflow Ion Mass Export for Two Streams in the Great Smoky Mountains National Park." 2011. http://trace.tennessee.edu/utk_gradthes/931.
Full textSadosky, Rebecca Baker. "Physical chemical and biological monitoring and analysis of four small New England watersheds during baseflow and stormflow conditions." 2010. https://scholarworks.umass.edu/dissertations/AAI3409841.
Full textFurtsch, Emily B. "The Effects of Urbanization on Baseflow over Time: An Analysis of Changing Watersheds and Stream Flow Response in Georgia." 2015. http://scholarworks.gsu.edu/geosciences_theses/79.
Full textKent, Christopher Andrew. "The influence of changes in land cover and agricultural land management practices on baseflow in southwest Wisconsin, 1969-1998." 1999. http://catalog.hathitrust.org/api/volumes/oclc/45165194.html.
Full textTypescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 294-305).
Ivkovic, Karen Marie-Jeanne. "Modelling Groundwater-River Interactions for Assessing Water Allocation Options." Phd thesis, 2006. http://hdl.handle.net/1885/49342.
Full textMAIEROVÁ, Monika. "Porovnání vybraných metod výpočtu základního odtoku na malém povodí a zhodnocení vlivu základního odtoku na koncentrace dusíku v celkovém odtoku." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-154482.
Full textŠVARCOVÁ, Eliška. "Porovnání vybraných metod výpočtu základního odtoku na malém povodí a zhodnocení vlivu základního odtoku na koncentrace fosforu v celkovém odtoku." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-154481.
Full textPrice, Kate. "Effects of land use and geomorphology on stream baseflows in the southern Blue Ridge Mountains." 2009. http://purl.galileo.usg.edu/uga%5Fetd/price%5Fkate%5Fm%5F200912%5Fphd.
Full text