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UID:pretalx-foss4g-it-2023-PWC8LG@talks.staging.osgeo.org
DTSTART;TZID=GMT:20230615T122000
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DESCRIPTION:Calamai S.\, Francesconi A. and Cinelli F.\nDepartment of Energ
 y\, Systems\, Territory and Construction Engineering\, Largo Lucio Lazzari
 no\, Pisa\, University of Pisa\nThe aim of this paper is to highlight the 
 main benefits of using the Qfield app in tree census activity. The advanta
 ge of entrusting all of the information to the main GIS platform of the pr
 oject\, which is stored inside the PC\, means this leaves only the task of
  checking the collected data\, along with the bonus of in-depth topographi
 cal and geospatial analysis. We illustrate the results of tree census acti
 vity in the state road 67 Tosco-Romagnola (SS 67) that connects Pisa with 
 Marina di Ravenna\, particularly in the stretch that connects the town of 
 Fornacette with Pontedera. Part of this stretch (about 1\,.7 km) belongs t
 o the Municipality of Calcinaia with which we are collaborating for the ur
 ban tree inventory. This one is straight\, has a discontinuous and partly 
 uneven double row of trees of the same species (hackberry)\, and is subjec
 t to high vehicular traffic\, even heavy\, due to the presence of artisana
 l and industrial activities. The goal of the work was to evaluate the phyt
 opathological and hazardous conditions and the ecosystem benefits of the t
 rees along this stretch of road in terms of healthy\, C02 absorption\, par
 ticulate matter (PM10) adsorption and shade effect using a GIS opensource 
 app (QFIELD and QGIS). Bio-morphometric parameters (diameter at breast hei
 gh\, tree height\, first branch height\, crown width according to the card
 inal points\, crown shape and density\, tree defects as cavities\, decays\
 , severity of pruning\, etc.) were recorded in situ during spring and summ
 er. An integrated urban tree inventory was built including both quantitati
 ve and qualitative information and the integration between the three softw
 are (ITREE\, QGIS\, QFIELD) has allowed us to observe the precise and punc
 tual geographical context.\nFrom the paper file we have moved on to a comp
 uterized file linked to the geographical point and this allows us to link 
 the observed defects and the calculated benefits of the trees to their pos
 ition (proximity to buildings\, presence of agricultural spaces). Hackberr
 y (Celtis australis L.) is a broadleaf tree species\, has a fast growth ra
 te\, little leaves and an height at maturity of 20 meters. The total numbe
 r of hackberry tree was 321 (179 on the right and 142 on the left in direc
 tion of Pontedera). Their main hazardous defects depend on severe pruning 
 and on conditions of the rooting site\, but overall the most abundant fail
 ure risk classes are B (low) with 155 plants and C (moderate) with 136 tre
 es. Only one is “D” class (extreme failure risk). These trees contribu
 te to reduce summer air conditioning loads by shading buildings and\, if t
 ree canopy is sufficient\, lowering air temperatures. In our case total el
 ectricity saved was equal to 40 GJ for a value of about 2240 Euros. Annual
  carbon dioxide reductions and releases amount to 178\,600 kg/year (total 
 stored CO2) and to 13\,440 kg sequestered (value total net CO2 about 110 E
 uros). Trees decrease also air pollution by adsorbing fine dust quantified
  in 270 kg deposition of pollutants.\nThe awareness of the existence of th
 ese benefits and their ecosystem and socio-economic value represents a sta
 rting point for improving the green urban ‘capital’ and the management
  practices to optimize their benefits. This integrated approach is an info
 rmation and governance opportunity to create a widespread consciousness of
  the value of urban green assets and implementing concrete actions to maxi
 mize their functions against the impact of climate change and air pollutio
 n.\nCurrently\, the possibility of an Open Source and a pocket GIS platfor
 m\, such as QFIELD\, truly represents a unique opportunity to make the wor
 k easier\, faster and more accurate. At the same time\, the GIS allows us 
 to have a continuous overview of the data produced on site and to further 
 implement information regarding the investigation by using geospatial anal
 ysis\, which helps to facilitate the final interpretative.\nSometimes tree
 s were prematurely removed\, not replaced\, and inadequately maintained be
 cause controlling costs outweighs management aimed at increasing their hea
 lth and the ecosystem services they provide over the long term. The inform
 atic tree census allowed us to give a fairly broad picture of the benefits
  of trees of this very busy road. Considering the empty places (removals) 
 and the stumps still present\, the system will be able to simulate the inc
 rease in benefits once the trees will be reintegrated.\nIn conclusion this
  study could be used by the Municipality for the redevelopment of the tree
 -lined road and to improve the quality of life of the residents\, mitigati
 ng the effects of pollution.
DTSTAMP:20260517T085125Z
LOCATION:Sala Videoconferenza @ PoliBa
SUMMARY:DATA COLLECTION FOR ASSESSMENT OF HAZARDOUS CONDITIONS AND ECOSYSTE
 M BENEFITS OF URBAN TREES USING QFIELD/QGIS - Calamai Stefano
URL:https://talks.staging.osgeo.org/foss4g-it-2023/talk/PWC8LG/
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