Mapping And Spectural Analysis Of Urban Trees In Kuching City

Nur Farhana, Abu Bakar (2010) Mapping And Spectural Analysis Of Urban Trees In Kuching City. [Final Year Project Report / IMRAD] (Unpublished)

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Abstract

Urban trees play important roles in urban environment such as improving air quality, acts as carbon sequester, helps in urban hydrology, noise and temperature reduction and have significant contribution in ecology and aesthetic values. Mapping of the urban trees is faster and accurately by using the Global Positioning System (GPS) and basic information such as tree numbers, height, species distributions and growing conditions is required. Spectral analysis of reflectance can be used to estimate the foliar concentration of the photosynthetic pigments, thus providing vital information on the physiological status of green plants. The objectives in this study include to map selected urban trees species in the Kuching City area and to characterize the various spectral signatures of the selected urban trees. Eighteen of tree species with 2357 individuals had been successfully mapped and their species compositions were recorded. Michelia champaca was the most dominant species and Pithecellobium dulce was the least dominant species planted at the study area. Most of the trees at the study area are in good health condition. In this study, two species of urban trees, T. pallida and A. angustiloba were selected for the determination of spectral signatures. . Results showed that there are differences in the spectral reflectance readings between the T. pallida and A. angustiloba as each tree species have their own identity and unique characteristic. From the one way ANOVA, there is a significant difference (p < 0.05) between the leaves reflectance (%) obtained from spectral analysis and the leaves chlorophyll content from SP AD readings. Decreasing chlorophyll concentration will resulted in increasing reflectance (%) readings of the leaves. Physiological status of the tree can be directly determined hence being a good indicator for the health status of the trees from the spectral analysis. All data collected are vital for sustainable urban management and hopefully Kuching North City Municipal can fully utilized these valuable informations for future management programmes.

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