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Full-Text Articles in Social and Behavioral Sciences
Meteorological And Streamflow Droughts: Characteristics, Trends And Propagation In The Milwaukee River Basin, Woonsup Choi, Hi-Ryong Byun, Claudio Cassardo, Jinmu Choi
Meteorological And Streamflow Droughts: Characteristics, Trends And Propagation In The Milwaukee River Basin, Woonsup Choi, Hi-Ryong Byun, Claudio Cassardo, Jinmu Choi
Geography Faculty Articles
This study examined meteorological and streamflow droughts for the period 1951-2006 using the Milwaukee River basin in Wisconsin as the study area in an effort to improve the understanding of drought propagation. Specifically, this study aimed to answer the following research questions: (1) What are the temporal trends of meteorological and streamflow droughts identified by drought indicators? (2) How do the drought indicators manifest drought propagation? Meteorological droughts were identified using the Effective Drought Index (EDI), and streamflow droughts were identified using a threshold-level approach. The intensity and duration of both types of drought were found to have decreased over …
Effects Of Urban Imperviousness Scenarios On Simulated Storm Flow, Feng Pen, Woonsup Choi, Jinmu Choi
Effects Of Urban Imperviousness Scenarios On Simulated Storm Flow, Feng Pen, Woonsup Choi, Jinmu Choi
Geography Faculty Articles
The amount and distribution of impervious surfaces are important input parameters of hydrological models, especially in highly urbanized basins. This study tests three different methods to input impervious surface area information to a semi-distributed hydrological model in order to examine their effects on storm flow. The three methods being evaluated include: (1) a constant value for impervious surfaces in the entire urban area, (2) constant values of imperviousness for commercial and residential land uses, respectively, and (3) different imperviousness for the residential land use in each subbasin. Storm flow of the Milwaukee River Basin in southeastern Wisconsin (USA) was modeled …
Impacts Of Climate Change And Urban Growth On The Streamflow Characteristics Of The Milwaukee River (Wisconsin, Usa), Woonsup Choi, Feng Pen, Changshan Wu
Impacts Of Climate Change And Urban Growth On The Streamflow Characteristics Of The Milwaukee River (Wisconsin, Usa), Woonsup Choi, Feng Pen, Changshan Wu
Geography Faculty Articles
Hydrological impact studies of climate change increasingly take land use changes into account. However, the Midwestern USA is still understudied in this context. This study investigated the impacts of potential climate change and urban growth on the streamflow characteristics of the Milwaukee River located in southeastern Wisconsin. The Hydrological Simulation Program-Fortran (HSPF) was set up for the catchment and calibrated against observed streamflow data. The calibrated HSPF model was run with a series of climate and urban growth scenarios generated from nine global climate models (GCMs) and a land use simulation model, respectively. The outcomes from the GCMs, statistically downscaled …
Urbanization And Rainfall-Runoff Relationships In The Milwaukee River Basin, Woonsup Choi, Kathryn Nauth, Jinmu Choi, Stefan Becker
Urbanization And Rainfall-Runoff Relationships In The Milwaukee River Basin, Woonsup Choi, Kathryn Nauth, Jinmu Choi, Stefan Becker
Geography Faculty Articles
To understand the changing rainfall-runoff relationship, the study examined climate and streamflow data in the Milwaukee River Basin in southeastern Wisconsin, of which four catchments with different degrees of urbanization were selected for analysis. This study analyzed temperature, precipitation, and streamflow data with a range of statistical methods, including the Mann-Kendall test, double-mass technique, and quantile regression. Runoff ratios and extreme flow indices were higher in more urbanized catchments. Catchments with long-term data (>40 years) showed significantly increasing runoff ratios and slopes in double mass curves. Overall, there are signs of changes in the rainfall-runoff relationship, but how much …
Regionalization Of Hydrologic Response In The Great Lakes Basin: Considerations Of Temporal Scales Of Analysis, Jonathan Martin Kult, Lauren M. Fry, Andrew D. Gronewold, Woonsup Choi
Regionalization Of Hydrologic Response In The Great Lakes Basin: Considerations Of Temporal Scales Of Analysis, Jonathan Martin Kult, Lauren M. Fry, Andrew D. Gronewold, Woonsup Choi
Geography Faculty Articles
Methods for predicting streamflow in areas with limited or nonexistent measures of hydrologic response commonly rely on regionalization techniques, where knowledge pertaining to gauged watersheds is transferred to ungauged watersheds. Hydrologic response indices have frequently been employed in contemporary regionalization research related to predictions in ungauged basins. In this study, we developed regionalization models using multiple linear regression and regression tree analysis to derive relationships between hydrologic response and watershed physical characteristics for 163 watersheds in the Great Lakes basin. These models provide an empirical means for simulating runoff in ungauged basins at a monthly time step without implementation of …
Regionalization Of Hydrologic Response In The Great Lakes Basin: Considerations Of Temporal Variability, Jonathan Martin Kult
Regionalization Of Hydrologic Response In The Great Lakes Basin: Considerations Of Temporal Variability, Jonathan Martin Kult
Theses and Dissertations
Methods for predicting streamflow in areas with limited or nonexistent measures of hydrologic response commonly rely on regionalization techniques, where knowledge pertaining to gaged watersheds is transferred to ungaged watersheds. Hydrologic response indices have frequently been employed in contemporary regionalization research related to predictions in ungaged basins. In this study, regionalization models were developed using multiple linear regression and regression tree analysis to derive relationships between hydrologic response and watershed physical characteristics for 163 watersheds in the Great Lakes basin. These models provide a means for predicting runoff in ungaged basins at a monthly time step without implementation of any …
Early Summer Dissolved Oxygen Characteristics In Restored Streams In Seoul, Casey Thoenen, Woonsup Choi, Jinmu Choi
Early Summer Dissolved Oxygen Characteristics In Restored Streams In Seoul, Casey Thoenen, Woonsup Choi, Jinmu Choi
Geography Faculty Articles
Abstract : This paper presents an evaluation of stream restoration projects in Seoul with a focus on dissolved oxygen. Five test sites across four streams were measured for dissolved oxygen (DO) in late May to early June in 2012 and compared against a set of minimum and maximum thresholds. Only one test site, Hwarang-cheon, showed measurements below 6 mg/l DO. Towards the upper limit, the Hwarangcheon site was the only tested stream which was not at risk of DO supersaturation. The Danghyeon-cheon site had the highest probability of supersaturation, with DO saturation exceeding 130% expected 86.5% of the time. When …
Subbasin Characteristics And Hydrological Response To Anticipated Urbanisation, Woonsup Choi
Subbasin Characteristics And Hydrological Response To Anticipated Urbanisation, Woonsup Choi
Geography Faculty Articles
This study investigated the relationship between the hydrological response of a river basin to anticipated urbanisation and its subbasin characteristics by applying a hydrological model (HSPF) with land use scenarios generated by an urban growth model (LEAM). The hydrological model was set up and run for the Kishwaukee River basin in northeastern Illinois, USA. The results show that the subbasin size and imperviousness were found to be more correlated to runoff changes than slope. However, no basin characteristics have significant relationships with percent changes in any hydrological variables due largely to the effects of upstream subbasins. When the effects of …