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Enhancing Environmental Impact Mapping in Urban Areas through Neighbourhood Sampling Framework

This study by Ronny Klæboe from the Institute of Transport Economics in Oslo examines the limitations of traditional national surveys in mapping environmental impacts, often focused on subjective measures without sufficient precision. Current sampling frameworks do not adequately capture local exposures from transportation sources like road vehicles and aircraft. The study proposes utilizing neighbourhood impact maps to stratify urban areas, enabling targeted sampling and improved monitoring of environmental quality and impacts, essential for assessing the effectiveness of pollution reduction measures.

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Enhancing Environmental Impact Mapping in Urban Areas through Neighbourhood Sampling Framework

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  1. Neighbourhood sampling framework Ronny Klæboe Institute of Transport Economics Oslo, Norway

  2. Environmental impacts often mapped through national surveys of life quality and living conditions • Utilises a sample frame historically constructed for merkantile/-demographic purposes • Often exposure estimates are lacking or of poor quality • There are usually no inventories of measures or monitoring of policies in place • Only impacts (annoyance subjective health impacts) are dealt with – not possible modifying factors etc.

  3. The sampling frame is not adapted to map exposures/environmental impacts in city areas • Environmental exposures are related to transportation sources – road vehicles, trains and aircraft that have local impacts • Exposures of area, line and point sources + propagation etc. often dealt with by acoustic, vibrational and air pollution experts utilising non-uniform methods

  4. What does this mean ? • A lot of interview resources go into eliciting answers from people that are not impacted • Gradients where impacts change as a result of increasing exposure receive inadequate attention • Exposure is not described with sufficient precision due to the disperse locations of the subjects/lack of measurement stations etc.

  5. A possible solution: • Utilise neighbourhood impact maps to stratify the city areas • Choose a sample of these with different environmental quality • Monitor/measure these to improve exposure mapping quality • Draw the sample from these locations to obtain proper focus of the interview resources

  6. Example of a noise impact map

  7. How can we deal with different impacts such as from noise and air pollution?

  8. If interview results are to map changes due to central/regional and local measures to reduce pollution: • It becomes necessary to monitor the implementation of measures – how else can we determine whether changes in environmental impacts are due to the initiatives ? • It becomes necessary to monitor other changes that might impact the changes of impacts in order to distinguish between the causal/ modifying factors

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