The Identification of Criteria and Indicators to Evaluate Hazardous Street Trees of Kuala Lumpur, Malaysia: A Delphi Study (original) (raw)

Street Tree Inventory and Tree Risk Assessment of Selected Major Roads in Kuala Lumpur, Malaysia

Journal of Arboriculture

Tree planting programs in Malaysia have progressed as planned. However, the subsequent management of the street trees, particularly at Kuala Lumpur City Hall, is not well undertaken due to inadequate information for management and maintenance purposes. There has never been a systematic tree survey conducted to inventory street trees in Kuala Lumpur. With this, a survey was conducted to collect comprehensive information on tree structure, species composition, species diversity, and tree defects and disorders. A total 2,191 street trees were surveyed.

STREET TREE INVENTORY & TREE RISK ASSESSMENT OF SELECTED MAJOR ROADS OF KUALA LUMPUR, MALAYSIA

2011

""Tree planting programs in Malaysia have progressed as planned. However, the subsequent management of the street trees, particularly at Kuala Lumpur City Hall, is not well undertaken due to inadequate information for management and maintenance purposes. There has never been a systematic tree survey conducted to inventory street trees in Kuala Lumpur. With this, a survey was conducted to collect comprehensive information on tree structure, species composition, species diversity, and tree defects and disorders. A total 2,191 street trees were surveyed. ""

Reviewing Tree Risk Inventory Framework for Tropical Urban Trees by Malaysia Experts

Environment-Behaviour Proceedings Journal

Malaysia lost 14.4% of its forests due to deforestation. As a result, the forests' ability to protect against physical disturbances was no longer practical. The study aims to review a framework of tree risk inventory for Malaysia’s tropical urban trees. Some expert interview sessions were conducted with Malaysian experts to present the proposed framework. Found that 100% of the experts agree with the framework presented. Additional components were added to the framework based on the data collected. The study could increase the relevant organizations' knowledge of managing tropical urban trees and decrease the deterioration and decline of tropical urban trees in Malaysia. Keywords: hazardous trees; tree monitoring; urban forestry, tree assessment eISSN: 2398-4287 © 2022. The Authors. Published for AMER ABRA CE-Bs by e-International Publishing House, Ltd., UK. This is an open-access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer...

Reviewing Tree Risk Inventory Model for Tropical Urban Trees by Malaysian Experts

Environment-Behaviour Proceedings Journal

The study aims to develop a new framework of tree assessment that is suitable for Malaysia’s tropical urban trees. A focus group discussion (FGD) method was conducted with Malaysian experts regarding the criteria needed to assess a tree's condition starting from the juvenile stage. Found that 92% of the participants agree with the preliminary framework presented. Additional components were added to the preliminary framework based on the data collected. The study could increase the relevant organizations' knowledge of managing urban trees and decrease the deterioration and decline of urban trees in Malaysia. Keywords: hazardous trees; tree monitoring; urban forestry, tree assessment eISSN: 2398-4287 © 2022. The Authors. Published for AMER ABRA cE-Bs by e-International Publishing House, Ltd., UK. This is an open access article under the CC BYNC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Env...

Setting the Criteria for Urban Tree Vandalism Assessment

2020

An urban tree monitoring programme is a management procedure that determines the performance status of trees by conducting an inventory of the number of trees, their condition, their structure, and other quantitative or qualitative characteristics. The ability to successfully carry out a monitoring programme is highly dependent on precise data. At the same time, comprehensive and strategic urban tree policies require accurate baseline and trending data. Accordingly, there is a need for an improved assessment technique for tree monitoring. Due to the increasing number of tree vandalism incidents in urban areas, the immediate objective of this research was to determine the criteria for a precise tree vandalism assessment technique. A modified Delphi method was adopted to obtain the most reliable consensus among tree care experts through a series of questionnaires. Prior to conducting the Delphi survey, the initial tree vandalism criteria were identified through a preliminary survey co...

Tree Health Assessment for Roadside Tree in Kota Kinabalu City Centre , Sabah

This study aimed to assess the health of main tree in the Kota Kinabalu City Centre, Sabah. In this study, principal evaluation standards were made by using visual observation of trees or Visual Tree Assessment (VTA). This study was conducted to identify any effect of damage or defect on trees via the observation of trees at their roots, stems, branches and leaves. There were five zones in the study area, namely from KK Lama and Jesselton Point (Zone 1) to Pasar Besar. The tree health parameters were evaluated from the presence of pests and diseases, trees health, foliage colour, the growth rate of trees, infections of the trees and potential failure of tree roots. In this study, nine of pathogens, pests and diseases of trees were observed, which were termites, fungi, aphid, mushrooms, epiphytes, parasites, ants, weeds and Whiteflies. This study showed that there were 23 species from the 688 stand of trees in the study area. The study found that the state average foliage colour was normal, a moderate growth rate and infection of the tree was still under controlled. The potential failure of tree root was found in low level as well. In a nutshell, the overall health of trees was found to be in good and moderate levels. This study was conducted as a reference in health detection of tree for The City Hall management (DBKK) and also as a reference for University students in conducting tree health assessment.

Tree risk identification, assessment and mitigation in Universitas Indonesia’s urban forest

IOP Conference Series: Earth and Environmental Science

Trees can drop limbs that injure or even kill people, damage vehicles and infrastructures, especially during storms or extreme climate. They need some assessment and mitigation to prevent it. The Urban Forest and Green Open Space in Universitas Indonesia (UI) need mitigation strategies to reduce the risk of fallen tree. The preventive conducts of fallen trees, broken branches and stems (that possess ability) to cause accidents at the Universitas Indonesia, Depok were carried out through several activities. The result were descriptions of the trees management in UI e.g annual monitoring data of trees, visual mapping, availability of proper tools, standard operating procedures and regular potentially-hazardous trees pruning and/or elimination. Also human resources improvement to meet the environmental safety demand for the UI academia civitas e.g. staffs competency enhancement training and sharing activities (related with tree pruning) with other institutions or stakeholders.

Comparison of visual risk assessment methods applied in street trees of Montevideo city, Uruguay

Revista de la Facultad de Ciencias Agrarias UNCuyo

Risk assessment of urban trees is an incipient practice in Latin America, generally performed with foreign methods, due to the lack of qualified personnel and locally validated or adapted methodology. This article evaluates the application of three methods on street trees in Montevideo city, Uruguay: Tree Hazard Risk Evaluation and Treatment System (THREATS), Quantified Tree Risk Assessment (QTRA) and Best Management Practices - Tree Risk Assessment (ISA BMP). Three assessors with similar experience applied three methods in 36 trees of three widely used genera, totaling 324 assessments and 1,296 data. The methods were decomposed into the components: Likelihood of Failure, Likelihood of Impact, Consequence and Risk Rating. The data were statistically analyzed through a generalized linear mixed model (p<0.05), for the factors: assessor, method, genus, and their interactions. Results showed no significant differences among assessors, but there were differences among methods, specifi...

Comparison of Four Methods of Street Tree Assessment

1993

Householders and professionals were surveyed regarding the suitability of eight street tree species planted in their area. The same species were rated in slide presentations, and physical inspections were undertaken of sidewalk damage associated with tree roots. There was more agreement among householder, expert and slide simulation procedures in rating specific attributes than in judging overall suitability of a street tree. Sidewalk inspections did not correlate with other information sources on root damage. The benefits and limitations of each assessment procedure are described.