ARBORICULTURE ARBORICULTU & CONTENTS ; Void B, 745 cm3 URBAN FORESTRY Volume 37, Issue 3, May 2011 Formerly the Journal of Arboriculture, 1975 – 2005 (Volumes 1 – 31) www.isa-arbor.com Daniel C. Burcham, Subhadip Ghosh, Leong Eng Choon, and Fong Yok King Evaluation of an Infrared Camera Technique for Detecting Mechanically Induced Internal Voids in Syzygium grande .............................................................................................................. 93 Abstract. In order to evaluate a proposed tree diagnostic technique employing infrared cameras, research was conducted to evaluate the effect of internal voids on surface temperature using a thermal photographic instrument. Three axial cylindrical voids of increas- ing size (Void A, 327 cm3 ; Void C, 1159 cm3 ) were introduced mechanically in 45 cm long stem sections and exposed to direct sunlight. Subsequently, infrared images were collected from two diametrically opposed sides of the stem sections at regular 30-minute intervals over 150 minutes. The collected images were evaluated visually to compare stem features with observed tempera- ture anomalies, and temperature data was extracted from a vertical transect in the infrared images. The data extracted were compared against a control stem section without defects to determine the independent and combined effects of void size and internal position on surface temperature. Mean relative temperature revealed a significant temperature change in the stems containing mechanical voids com- pared to the control stem. Significant increases in mean relative temperature were recorded on the stems containing Void A and Void B compared to the control. However, there was no significant change in mean relative temperature on the stem section containing Void C. Key Words. Infrared Camera; Internal Defects; Syzygium grande. A.A. Nor Akmar, C.C. Konijnendijk, M. Sreetheran, and K. Nilsson Greenspace Planning and Management in Klang Valley, Peninsular Malaysia ............................... 99 Abstract. In rapidly developing countries such as Malaysia, the importance of urban greenspaces is recognized, but due to rapid industri- alization and urbanization, maintaining and developing greenspace is a major challenge. This paper analyzes the status of urban greens- pace policy, planning, and management in Malaysia. For this purpose, information was collected about urban greenspaces and their governance, planning, and management, both at the national level and in six representative case cities in the most urbanized part of Malaysia, the Klang Valley. Data was compiled by means of a literature review, document analysis, and expert interviews with municipal officers in the selected cities. Results show the greenspace discourse in Malaysia has shiſted its focus from one dominated by beauti- fication to one concentrated on regarding greenspace as an essential part of the urban infrastructure. In spite of similarities in municipal greenspace management organization and legislation, each city has its own approach in terms of prioritized greenspace functions, greens- pace planning, and collaboration with different actors and stakeholders. A shiſt is occurring toward greater involvement of nongovern- ment actors in governance and management. Challenges related to maintaining multifunctional greenspaces in a time of rapid economic development and urbanization call for better implementation of policy and legislation, and of balancing national visions with local needs. Key Words. Environmental Governance; Greenspace Policies; Green Structure; Urban Greening; Urban Greenspace. W. Andy Kenney, Philip J.E. van Wassenaer, and Alexander L. Satel Criteria and Indicators for Strategic Urban Forest Planning and Management ........................... 108 Abstract. The success of urban forest management is frequently predicated upon achieving absolute canopy cover targets. This two-dimensional view of the urban forest does not provide a comprehensive assessment of urban forest stewardship in a community and does not account for an area’s potential to support a forest canopy. A comprehensive set of performance-based criteria and indicators concerning the community’s vegetation resource, community framework and resource management approach is described. This set of broadly based measures provides a more useful tool for the evaluation of urban forest management success and strategic management planning. Key Words. Canopy Cover; Municipal Planning; Relative Canopy Cover; Sustainability; Urban Forest Planning; Urban Forestry. ©2011 | International Society of Arboriculture | ISSN:1935-5297
May 2011
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