• Early Summer Dissolved Oxygen Characteristics in Restored Streams in Seoul 

  Thoenen, Casey; Choi, Woonsup; Choi, Jinmu (2013-01-01)

  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 ...

• Forest Cover Changes in North Korea Since the 1980s 

  Kang, Sangjun; Choi, Woonsup (2014-01-01)

  North Korea used to have abundant forest stocks but underwent substantial deforestation and degradation of forest in recent decades. This study examined morphological changes of forest cover in North Korea between the 1980s ...

• Meteorological and Streamflow Droughts: Characteristics, Trends and Propagation in the Milwaukee River Basin 

  Choi, Woonsup; Byun, Hi-Ryong; Cassardo, Claudio; Choi, Jinmu (2018-04-05)

  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, ...

• Hydrological impacts of warmer and wetter climate in Troutlake and Sturgeon River basins in central Canada 

  Choi, Woonsup; Kim, S. J.; Lee, M.; Koenig, K.; Rasmussen, P. (2017-01-01)

  The impact of climate change on water availability in two river basins located in central Canada is investigated. Several statistical downscaling methods are used to generate temperature and precipitation scenarios from ...

• Air Temperature Variability in Illinois Based on Weather Station Records and the North American Regional Reanalysis from 1979 to 2006 

  Choi, Woonsup; Keuser, Anke Petra Maria; Becker, Stefan (2017-01-01)

  Spatial and temporal near-surface air temperature 21 variabilities and trends were analyzed for 30 locations in Illinois based on annual data derived from station records and the North American Regional Reanalysis (NARR) ...

• Calibration of Land Use Change Drivers in Support of Dynamic Urban Growth Modeling 

  Choi, Woonsup; Sun, Zhanli (2005-01-01)

  The Land use Evolution and impact Assessment Model (LEAM) is a cellular urban dynamics model designed to simulate changing landscapes over space and time. One of the challenging problems in the LEAM model is calibrating ...

• Subbasin Characteristics and Hydrological Response to Anticipated Urbanisation 

  Choi, Woonsup (2008-01-01)

  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 ...

• A spatio-temporal analysis of groundwater level changes in relation to urban growth and groundwater recharge potential for Waukesha County, Wisconsin 

  Choi, Woonsup; Galasinski, Ulrike; Cho, Sung-Jin; Hwang, Chul-sue (2012-01-01)

  The main objective of this study was to spatially and temporally analyze groundwater level changes using geographic information systems and spatial analysis with respect to urban development, groundwater water withdrawal, ...

• Effects of Climate, Basin Characteristics, and High-Capacity Wells on Baseflow in the State of Wisconsin, United States 

  Borchardt, Susan A; Choi, Woonsup; Choi, Jinmu (2022-02-01)

  When it comes to water resources management, it is critical to understand the factors that affect baseflow processes. Declines in baseflow due to increased use of the groundwater from unconfined aquifers is well documented, ...

• Human Influences and Decreasing Synchrony between Meteorological and Hydrological Droughts in Wisconsin Since the 1980s 

  Choi, Woonsup; Borchardt, Susan Ann; Choi, Jinmu (2021-04-01)

  Hydrological droughts are important for agriculture and other human activities such as navigation and groundwater pumping, so it is necessary to understand their characteristics at various temporal and spatial scales. This ...

• A Conceptual Modeling Framework for Hydrologic Ecosystem Service 

  Choi, Woonsup; Pan, Feng (2019-01-01)

  Ecosystem services (ES) help people understand and deal with current environmental situations and problems, and ES-related research has been increasing recently. However, the quantitative evaluations of ES that can be ...

• Changes in the Extent and Distribution of Urban Land Cover in the Democratic People's Republic of Korea (North Korea) Between 1987 and 2010 

  Kang, Sangjun; Choi, Jinmu; Yoon, Hyejin; Choi, Woonsup (2019-01-01)

  Largely due to data unavailability, the spatial pattern of urban growth in North Korea has been rarely studied. This study explored urban changes in North Korea and provided their plausible causes. The present study used ...

• Strong trait correlation and phylogenetic signal in North American ground beetle (Carabidae) morphology 

  Stachewicz, Jacob D; Fountain-Jones, Nicholas M; Koontz, Austin; Woolf, Hillary; Pearse, William D; Gallinat, Amanda S (2021-11-01)

  Functional traits mediate species’ responses to, and roles within, their environment and are constrained by evolutionary history. While we have a strong understanding of trait evolution for macrotaxa such as birds and ...

• Snowmelt Runoff Modeling: Limitations and Potential for Mitigating Water Disputes 

  Kult, Jonathan; Choi, Woonsup; Keuser, Anke Petra Maria (2012-01-01)

• Effects of Urban Imperviousness Scenarios on Simulated Storm Flow 

  Pen, Feng; Choi, Woonsup; Choi, Jinmu (2018-01-01)

  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 ...

• Impacts of climate change and urban growth on the streamflow characteristics of the Milwaukee River (Wisconsin, USA) 

  Choi, Woonsup; Pen, Feng; Wu, Changshan (2017-01-01)

  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 ...

• Characteristics of Deforestation in the Democratic People’s Republic of Korea (North Korea) between the 1980s and 2000s 

  Choi, Woonsup; Kang, Sangjun; Choi, Jinmu; Larsen, Joseph James; Oh, Chungweon (2017-01-01)

  There has been a significant lack of land cover change studies in relation to deforestation in the Democratic People’s Republic of Korea (North Korea). The purpose of this study is to characterise deforestation in North ...

• Impacts of Climate Change and Urban Expansion on Hydrologic Ecosystem Services in the Milwaukee River Basin 

  Pen, Feng; Choi, Woonsup (2019-01-01)

  Land use/land cover (LULC) and climate changes could affect water quantity and quality and thus hydrologic ecosystem services (ES). However, studies of these impacts on hydrologic ES are limited by the current methods and ...

• Climate Change and Nighttime Heat Stress: Tales of Two Cities in the U.S. Midwest 

  Choi, Woonsup (2018-09-01)

  This study explores nighttime heat stress in two Midwestern regions in the United States, encompassing the cities of Minneapolis and Milwaukee. Daily minimum temperature data were obtained from the MACAv2-METDATA dataset ...

• Regionalization of Hydrologic Response in the Great Lakes Basin: Considerations of Temporal Scales of Analysis 

  Kult, Jonathan Martin; Fry, Lauren M; Gronewold, Andrew D; Choi, Woonsup (2014-11-01)

  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 ...

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