• 沒有找到結果。

Conclusion and Recommendations

Adaptive capacity is an understudied yet is conceptually and practically important for the future as the consequences of climate change progress. Using Gallopin’s review (2006), this study created an adaptive capacity index to assess a local area’s

socioeconomic and biophysical ability to adapt, where adaptive capacity is the capacity of response and thus a subset of vulnerability in the context of global environmental change. This set of indicators was compiled into the Urbanization Adaptive Capacity Index, or UACI. Its contribution to the literature is the consideration of urbanization (primarily the transformation of vegetated land cover to build up urban land cover), as urbanization is intricately tied to climate change. The goal with the UACI is to help small locales assess their adaptive capacity and identify strengths and weaknesses. This research had the additional goals of illustrating the effect of land use change on social and environmental factors, as well as making an international comparison between two case study sites.

Using predicted land use change, we predicted changes in adaptive capacity under three different scenarios through 2 time slices, 2030 and 2050. To do this, we chose indicators correlated with LULC change and applied it to years 2000 and 2010 to find a baseline trend, each as a function of LULC change. Land use scenarios were developed based on IPCC literature.

Under all scenarios, both Tamsui and West Palm Beach lost vegetated natural land cover to development. But in Tamsui, all the UACI scores declined after the baseline year, whereas in West Palm Beach, Scenario B had an increasing score through 2030 and 2050. The results tell a general, familiar narrative-- that there are increased social and economic benefits as a place urbanizes, such as higher levels of education or income, but at some point the benefits peak and urban cons begin to overtake its benefits, particularly the environmental costs. According to our results, Tamsui has already reached that point, although this does not necessarily suggest that Tamsui is more vulnerable to climate impacts, as adaptive capacity is only a part of the equation. West Palm Beach and the rest of southern Florida are susceptible to saltwater inundation, which is a sensitivity and exposure issue, and is not linked to urbanization and thus not represented in this study. Nonetheless, it seems its adaptive capacity will decrease into the future.

For the two sites considered in this study, urbanization is shown to bring socioeconomic benefits at the cost of environmental quality. Sustainable development is a concept which aims to separate these trends and provide a way to decouple growth from environmental degradation. It is imperative that Tamsui follow a more conscientious path than a BAU approach, as even a slower growth scenario will not be sufficient to maintain a high level of adaptive capacity. Drastic measures are necessary

to adapt to the impacts resulting from climate change. Policy changes will have to be holistic and consider wellbeing in the long term in a number of different sectors, such as health, economy, transportation, energy and more.

Considering these results, we recommend that Tamsui maintain natural land cover by limiting urban sprawl and development in the mountainous areas to maintain the benefit-over-detriment balance as seen in the baseline score. While preserving the ecosystems of higher altitudes is a high priority in all of Taiwan, this model shows that total natural land cover is of great importance to adaptive capacity in the area, and thus Tamsui should be especially cautious considering its large resident and tourist population. At the same time, maintaining higher population densities can help prevent further land use change. As far as other socioeconomic strategies, fosters stronger social networks and build trust among those in the community can be beneficial for increasing adaptive capacity.

Nationwide initiatives will also be important. As Taiwan has a more centralized government and active climate change policies, national level strategies will also be necessary, especially in terms of bringing up median incomes through labor legislation or keeping inequality low through social programs and regulation.

West Palm Beach falls earlier on this urbanization curve, giving the community more leeway to keep adaptive capacity higher. But as many residents in Florida, and

more broadly across the country, do not find climate change to be a salient issue, framing adaptive capacity issues in a viable way is key. Often encouraging risk reduction and disaster preparedness more generally can be more effective than emphasizing climate change.

The maintenance of Grassy Waters Preserve in West Palm Beach has positive effects on adaptive capacity, as well as in a number of other aspects, especially since the city draws its water from the wetland. West Palm Beach is unlikely to completely open up the preserve to development, as done in our scenarios, but should take care to prevent any ecological degradation like urban encroachment, which can lead to water and air pollution. The existence of the preserve was a key factor in the outcome of the index scores.

West Palm Beach should also focus on mitigating social strain of urbanization, as the region is expecting increased demographic change, especially with regards to immigration. Some demographic groups can be at higher risk and limited access to resources, which will adversely affect indicators such as inequality, internet access, and median household income. Integrating and supporting these populations justly will be key to lowering inequality and increasing social capital.

This research presents the UACI as an introductory model that can be easily elaborated in several aspects, as future data will inevitably be available in finer scales

as well as more frequent, detailed collection. Ideally, this index would include biodiversity and other land-related indicators as data availability and access improves.

Additionally, studies on different geographic locations can reveal different findings and are key to providing a richer picture of climate adaptive capacity.

The major benefits of the UACI is that it is an easy-to-use and -understand index, ideal for small scale, quickly-urbanizing communities to see different potential trends in their adaptive capacity. This index is especially suited to assess districts in a city for comparison or other similar situations. Its importance lies in its ability to provide policy makers and planners with concrete information on which to make decisions to improve adaptive capacity.

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