Chafika Phiri

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  • Name: Chafika
  • Surname: Phiri
  • Organisation Name: Copperbelt University
  • Main Sector: private
  • Specific Sector: forestry and arboriculture
  • City: Kitwe
  • Country: Zambia
  • Description: My name is Chafika Phiri and I come from Zambia. I hold an MSc in Forest Science and I am currently working as a Lecturer at Copperbelt University in Zambia. My research interests are ecosystem services, climate change, environmental policy and sustainable land use. I am writing to express my keen interest to join Uforest as an individual because this group will help me collaborate with other scientists globally and help me grow my network.
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Blueprint for Innovation in Urban Forestry

Photo credit: Freepik

A review of urban forestry’s potential for a healthier and more sustainable future

Urbanisation is a global trend: according to the United Nations Department of Economic and Social Affairs (UN DESA), today 55.5% of the world’s population lives in urban areas and this number is expected to increase to 68% by 2050. Increasing urbanisation and concentration of the population in cities brings several environmental and health challenges. Indeed, these developments have negative impacts on the quality of life, biodiversity, and resilience in cities, as well as on the health and well-being of their citizens and on the environment as a whole.  

In recent years, two important approaches have emerged to promote solution-oriented actions and targets to address these challenges. The first is the set of the 17 Sustainable Development Goals (SDGs) endorsed by the UN as a global shared plan to tackle economic, social, and environmental challenges by 2030. The second is the implementation of Nature-based solutions (NBS), i.e. solutions inspired and supported by nature.

Urban forests are valued as effective NBS, as they can help address both global and societal challenges, providing benefits to human well-being and biodiversity. For this reason, urban forestry is an interdisciplinary field that studies, plans, implements, and manages urban forests as the tree-based component of wider urban green infrastructure. Its goal is to promote the psychological, sociological, aesthetic, economic, and environmental benefits urban forests provide to society. Therefore, urban forestry can play a key role in the achievement of the SDGs by increasing the sustainability of cities, providing clean water, increasing income and job opportunities, promoting outdoor recreation activities, promoting biodiversity, fostering a green economy, and contributing to climate change mitigation and adaptation. Promoting innovation in urban forestry can further enhance these benefits and provide more effective, efficient, and equitable results.

The main objective of this report is to provide a first framework for assessing innovation factors influencing urban forestry. Through the analysis of 20 case studies on urban forestry best practices in the EU, this report offers an overview of urban forestry innovation in the European continent. This document will be used as part of urban forestry lobby and dissemination activities within the Uforest project, with the intention to spread the knowledge about the potential of urban forest as NBS for cities.

The analysis of the case studies suggests that innovative approaches in urban forestry can optimise services, while solving local environmental and social challenges in a multidisciplinary perspective. However, there is still the need to explore innovation in urban forestry, scale up this type of initiatives, and strengthen the collaboration among different disciplines, as well as among different stakeholders, and facilitate the co-creation of knowledge.

Finally, as suggested by the report, urban forestry should go hand-in-hand with entrepreneurship, exploring sectors and collaboration to create new opportunities.

Publication details

Title: Blueprint for Innovation in Urban Forestry 

Reference: Uforest Erasmus+ project, Deliverable 3.3 Blueprint for Innovation in Urban Forestry.

Authors: Joan Pino (UAB), Florencia Florido (CREAF), Colm O’Driscoll and Ilaria Doimo (Etifor), Cecil Konijnendijk (NBSI). 

Contributors: Rik De Vreese, Dennis Roitsch, Juliet Achieng (European Forest Institute), Nadina Galle (Green City Watch), Petronela Candrea (Forest Design), Jorge Olivar (AGRESTA), Lluís Pesquer, Corina Basnou (CREAF), Josep Maria Espelta (CREAF), Sofia Paoli, Maria Chiara Pastore (POLIMI), Arianna Ruberto and Serena Cesca (Etifor). 

The potential of remote sensing in urban forest inventory

Photo credit: Freepik

A new way of quantifying and monitoring Urban Forest dynamics

Nowadays, remote sensing is one of the most important technologies for forest inventories. The availability of open data from Copernicus constellation and national programs of aerial photogrammetry capture and LiDAR (Light Detection and Ranging) has allowed the development of new urban forest inventory techniques. The combination of this new data sources with machine learning techniques, open software and computing capability is the basis of a revolution in terms of forest inventory.

LiDAR area-based approach technology is operationally implemented for forest inventories where this kind of data are available (e.g. Spain). In recent years, this technology has been used mostly in rural areas. Nevertheless, it could be a perfect solution for several Urban Forestry cases. One of its main limitations is the cost of data acquisition, which involves long periodicities between acquisition campaigns. Data obsolescence due to natural or anthropogenic disturbances constrains its applicability, especially in dynamic ecosystems.

However, other data sources are available to complete LiDAR data such as Sentinel2 – a satellite of the Copernicus constellation – or digital aerial photogrammetry, whom programs are much more widespread at national level and have shorter periodicities. For this reason, their use for forest inventory could have great potential for monitoring forest with temporal continuity.

In the present article, we show the potential of the combination of different data sources in forest inventory in a concrete case study.

 

The case study

The study area comprises the urban forest of the municipality of Traunstein, located in Upper Bavaria (Germany), between Munich and Salzburg. This pilot project has been the first inventory carried out with model transfer from LiDAR massing methods to photogrammetric data of the state of Bavaria. The objective of this study was twofold: to evaluate the accuracy of this methodology in the predictions of the most important metrics that should be included in every forest inventory (such as dominant height, quadratic mean diameter, basal area and volume), and to analyse the potential of this technology in urban forest inventory.

Satellite data has been used in order to classify forest species. We generated a forest species mapping for the whole study area as a basis for the application of the fitted models. The assessment of the classification accuracy ranged from 76.1% for pure Norway spruce stands (due to confusion with other conifers) to 89.2% for pure beech stands.

Once we identified the species in every pixel of 20x20m, we fitted the model for the forest variables selecting some LiDAR statistic transferrable between LiDAR and photogrammetric point clouds thanks to the experience our R&D team. To do so, we combined field data from 2008 (98 inventory plots) with a LiDAR flight using machine learning techniques. We transferred these algorithms to a photogrammetric point cloud captured in 2020. The assessment of the goodness-of-fit of the models was carried out with an independent sample of 38 plots surveyed in 2021, calculating the mean quadratic error in absolute (RMSE) and relative (rRMSE) values.

This shows the potential of combining different data sources in forest inventories based on remote sensors for urban forests. The necessary stratification can be generated with a suitable resolution by means of classification of Sentinel-2 satellite images and ground truth data obtained in the field. The incorporation of this type of images in forest inventories over large areas, especially in inventories based on LiDAR technology, can lead to an improvement in the resolution of forest species mapping and ultimately to an improvement in the estimation of forest inventory variables, especially in mixed stands. Regarding urban forest inventory metrics, the model fitting results on the LiDAR point cloud were satisfactory, with a mean quadratic error below 14 % for all analysed variables.

The existence of national aerial orthophotography capture programmes with periodicities between 1, as in Bavaria, and 3 years, as in Spain, is common in Europe. Therefore, these results have a huge potential impact in those countries where there is at least LiDAR coverage, which allows normalising the heights of photogrammetric point clouds, for their application in forest inventories.

The development of specific photogrammetric models and their transfer to LiDAR models and vice versa can provide an opportunity to take advantage of already captured field data, which is one of the most important costs of LiDAR inventories, thus maximising data utilisation when addressing future forest inventories once new LiDAR or photogrammetric coverages become available.

Authors:

Jorge Olivar1, José Luis Tomé1, Santiago Martín1 and Astor Toraño2
(1) Agresta S. Coop
(2) Chair of Forest Growth and Yield Science, Technical University of Munich

 

Ainuddin Nuruddin

is part of the Uforest Alliance connecting individuals and organizations in Uforest activities!

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  • Name: Ainuddin
  • Surname: Nuruddin
  • Organisation Name: Pertubuhan Bara Hijau
  • Main Sector: private
  • Specific Sector: forestry and arboriculture
  • City: Bandar Baru Bangi
  • Country: Malaysia
  • Description: Contribute to the development of World Urban Forestry
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Atiya Livingston

is part of the Uforest Alliance connecting individuals and organizations in Uforest activities!

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  • Name: Atiya
  • Surname: Livingston
  • Main Sector: private
  • Specific Sector: forestry and arboriculture
  • City: Rotterdam
  • Country: Netherlands
  • Social: https://www.linkedin.com/in/atiyalivingston/
  • Description: I am an urban forestry professional with experience in wildfire management and arboricultural consulting for development. I am transitioning into urban planning but hope to maintain and influence nature-based solutions and climate-resilient planning. Hoping to grow my connections in the EU and looking for opportunities to gain further experience.
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GEBRETSADIK TAMENE

is part of the Uforest Alliance connecting individuals and organizations in Uforest activities!

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  • Name: Gebretsadik
  • Surname: Tamene
  • Organisation Name: University of Gondar
  • Main Sector: private
  • Specific Sector: urban planning and landscape architecture
  • City: Gondar
  • Country: Ethiopia
  • Description: I would like to share information to expand my skills and knowledge in urban forestry, as well as share my research outputs with the Uforest alliance members
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Justin Odinson

is part of the Uforest Alliance connecting individuals and organizations in Uforest activities!

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  • Name: Justin
  • Surname: Odinson
  • Main Sector: private
  • Specific Sector: forestry and arboriculture
  • City: Birkenhead
  • Country: United Kingdom
  • Description: I have a love for trees and the benefits they can provide to human kind
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Diana Munoz

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  • Name: Diana
  • Surname: Munoz
  • Main Sector: private
  • Specific Sector: forestry and arboriculture
  • City: Neiva
  • Country: Colombia
  • Description: I'm agronomy engineer, I work with forest projects.
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Paloma Cariñanos

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  • Name: Paloma
  • Surname: Cariñanos
  • Organisation Name: University of Granada
  • Main Sector: private
  • Specific Sector: health well-being services and citizen engagement
  • City: Granada
  • Country: Spain
  • Description: I would like to share knowledge and experiences on the valuation of ecosystem services and disservices of urban forests and their impact on the health of citizens
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Sweetu Panchal

is part of the Uforest Alliance connecting individuals and organizations in Uforest activities!

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  • Name: Sweetu
  • Surname: Panchal
  • Main Sector: private
  • Specific Sector: urban planning and landscape architecture
  • City: Ahmedabad
  • Country: India
  • Description: Urban forest is essential and indigenous part of cities .
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