LEUNG Yee 梁怡

Research Projects

  • Characterization of Low Flows for Water Resources Management in the East River (Dongjiang) Basin
  • CHEN Yongqin David, CHEN Min-jian*, FUNG Tung, LEUNG Yee, SHAO Quanxi*, XIA Jun*
    1 December 2003
    Research Grants Council (Earmarked Grants)

    Water resources in the East River basin have been highly developed and heavily committed for a variety of uses such as water supply, hydropower, navigation, irrigation, and suppression of seawater invasion. In recent years the East River provides supply to meet about 80% of Hong Kong’s annual water demands. Low-flow conditions and hydrologic droughts are obviously very crucial to the reliability and vulnerability of the East River water resources systems to satisfy the multiple objectives of water uses. This study is therefore proposed to employ hydrologic analysis methods for low-flow characterization and modeling techniques for optimization of water resources systems under low-flow conditions. This research will advance the state-of–the–art of low-flow hydrology through studies for developing and applying a variety of techniques and models (both statistical and analytical) to characterize and estimate low-flow regimes. Two techniques, frequency analysis and baseflow recession analysis, will be performed to characterize low flows in terms of minimum average-streamflow rates and the associated probability distributions. To estimate low-flow statistics at ungauged sited, this study will adopt a regional hydrologic modeling approach to developing statistical relationships (both ordinary regression and geographically weighted regression) between low-flow statistics at gauged sites and a number of drainage basin characteristics derived from maps and remote sensing images. Finally, impacts of low flows on water quality and other water uses will be assessed and, multi-objective programming techniques will be applied to optimize water resources systems for the formulation of management strategies and plans. This study will not only have tremendous scientific merits, but also highly valuable practical significance and enormous relevance to Hong Kong. (CU03247)

  • Virtual Interactive Student-Oriented Learning Environment (VISOLE)---Extending the Frontier of WEB-Based Learning
  • LEE Fong Lok, LEE Ho Man Jimmy (Dept of Computer Science and Engineering), LEUNG Yee (Dept of Geography & Resource Management), CHAU Kwai Cheong (Dept of Geography & Resource Management)
    1 December 2002
    Research Grants Council (Earmarked Grants)

    WEB-based teaching is one of the new directions for education. The approach aims at using the WEB, being a networked, anytime, interactive, high-capacity and content-rich environment, to enhance and facilitate independent learning and teacher-student communication.
    This goal has only been partially fulfilled since existing WEB-based teaching systems use the WEB more as a publishing medium, without utilizing the available immense computing power. In this project, we propose the Virtual Interactive Student-Oriented Learning Environment (VISOLE) approach to WEB-based teaching and learning. The aim of the VISOLE project is to study how the full functionality of the WEB can be exploited to help students learn from (near) real-life experiences and from social construction of knowledge. Students will learn directly from the immersion experience. Teachers, closely monitoring the progress of the development of the virtual world, can extract useful scenarios for classroom discussions.
    Briefly speaking, VISOLE encompasses the creation of a virtual interactive world modeled upon a set of selected and related subject areas on the WEB, and allows students to participate as "citizens" who take part in shaping the development of this virtual world. By involving in the VISOLE environment, students learn to analyse problem situations, devise problem solving strategies, solve problems and evaluate consequences. All these are considered high-order abilities required in this new era.
    We propose to construct a virtual environment based on the subjects of geography and urban planning using the VISOLE approach. The environment will be tested among schools in Hong Kong and possibly other regions. Results of the evaluation can be used to direct WEB-based research activities in the future. (CU02200)

Research Publications

  • "From Paper Maps to Virtual Reality - a View from Hong Kong" (co-authored with FUNG Tung and LIN Hui). The Cartographic Journal vol.41 no.3, Leeds, United Kingdom: The British Cartographic Society, 2004.12. pp.261-264.
    (CUHK Library Call No: UL Periodical GA101 .C381 v.41-43, 2004-06; Available Online)

  • "Mangrove Species Mapping using Quickbird Image in the Maipo Ramsar Site, Hong Kong" (co-authored with FUNG Tung, WONG KWAN KIT and DAI M. W.). Paper presented in the Annual Conference of the Association of American Geographers. Boston, 2008.04.

  • "Multifractal Characterization of Hong Kong Air Quality Data" (co-authored with ANH V. V., LAM Kin Che and YU Z. G.). Environmetrics vol.16 no.1, John Wiley & Sons, Ltd., 2005.02. pp.1-12.
    (CUHK Library Call No: UL Periodical GE45.S73 E58 v.16, 2005; Available Online)

* Name of external researcher
# Name of staff who has left the University