Distribution of Alluvial Landforms and Change of Urbanized Area in Small and Medium Cities, Korea

The existing Kai Tak Nullah flows from Po Kong Village Road along Choi Hung Road and Tung Tau Estate into Kai Tak Development Area before discharging into the Victoria Harbour. Historically its upstream has been subject to flooding under storm conditions and this has had serious repercussions for the adjacent urban areas. A study has been commissioned by the Drainage Services Department of the Government of the Hong Kong Special Administrative Region (HKSAR), China to investigate the flood mechanisms and to provide flood alleviation measures by improving the capacity of the Kai Tak Nullah. In addition to flood alleviation, there is a strong public aspiration to rehabilitate the Kai Tak Nullah by a comparatively natural river design. Since the Kai Tak Nullah is located within a heavily urbanized area, traffic and environmental impacts are also highly concerned. The final flood alleviation scheme has thus had to strike a balance among the aforesaid factors with assistance from the hydraulic modelling utilizing InfoWorks Collection Systems (CS) software. This paper presents the public engagement exercise, design considerations, methodologies, and recommendations regarding the reconstruction and rehabilitation of the Kai Tak Nullah.

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Characterization of Animal Sporotrichosis in a Highly Urbanized Area

Comparative Immunology Microbiology and Infectious Diseases ◽

10.1016/j.cimid.2021.101651 ◽

2021 ◽

pp. 101651

Author(s):

Elisa Helena Paz Andrade ◽

Simone Magela Moreira ◽

Marcelo Teixeira Paiva ◽

Hassan Melo Zibaoui ◽

Lauranne Alves Salvato ◽

...

Keyword(s):

Urbanized Area

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Integration of Satellite Data with High Resolution Ratio: Improvement of Spectral Quality with Preserving Spatial Details

Sensors ◽

10.3390/s18124418 ◽

2018 ◽

Vol 18 (12) ◽

pp. 4418 ◽

Cited By ~ 4

Author(s):

Aleksandra Sekrecka ◽

Michal Kedzierski

Keyword(s):

High Ratio ◽

Data Sets ◽

Spectral Quality ◽

Local Statistics ◽

Panchromatic Image ◽

Urbanized Area ◽

Fusion Methods ◽

Spatial Quality ◽

Different Levels

Commonly used image fusion techniques generally produce good results for images obtained from the same sensor, with a standard ratio of spatial resolution (1:4). However, an atypical high ratio of resolution reduces the effectiveness of fusion methods resulting in a decrease in the spectral or spatial quality of the sharpened image. An important issue is the development of a method that allows for maintaining simultaneous high spatial and spectral quality. The authors propose to strengthen the pan-sharpening methods through prior modification of the panchromatic image. Local statistics of the differences between the original panchromatic image and the intensity of the multispectral image are used to detect spatial details. The Euler’s number and the distance of each pixel from the nearest pixel classified as a spatial detail determine the weight of the information collected from each integrated image. The research was carried out for several pan-sharpening methods and for data sets with different levels of spectral matching. The proposed solution allows for a greater improvement in the quality of spectral fusion, while being able to identify the same spatial details for most pan-sharpening methods and is mainly dedicated to Intensity-Hue-Saturation based methods for which the following improvements in spectral quality were achieved: about 30% for the urbanized area and about 15% for the non-urbanized area.

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