Jorge Simão Cruz (Portugal) 1; Selma B. Pena (Portugal) 2
1 - Universidade de Lisboa, Instituto Superior de Agronomia; 2 - Universidade de Lisboa, Instituto Superior de Agronomia, LEAF - Linking Landscape, Environment, Agriculture and Food Research Centre
In 2015, the legislative update on Territorial Planning in Portugal led to a new territorial management instrument: the Intermunicipal Program. With this program new opportunities for planning and managing the territory are established, defined by limits which adapt to a purpose or objective to be protected. Namely, to create strategies to mitigate and reduce the impact of extreme natural events. On the other hand, this new law has given rise to uncertain meanings regarding the classification of land use, and how the classification of a given area in urban or rural areas is justified. However, the classification of the soil in the intermunicipal scope, confers a greater homogeneity in the territory. Where flexibility is highlighted between the urban and natural environment of the landscape. Nonetheless, the challenge is to still reconcile the other political realities of each municipality.
Integrated planning increasingly assumes a predominant role in defining the territory, considering all the processes which occur there, whether natural or resulting of human activities, admitting as integral parts of the territorial system. It is, however, a response to the rapid urban expansion, which, combined with the dynamics of the watercourses of a given river basin, increases the risk of urban flooding. Implementation concepts, such as sponge city, conceive the strategies which result in contributory measures in reducing this impact.
Characterized by the Mediterranean climate, watershed of the Jamor river may suffer from the implementation of urbanized structures, a significant contribution to the increase of flood risk. A territorial model that allows intermunicipal homogeneity can be an initiative to overcome this effect, especially in reducing the time of concentration of the rainwater in ten minutes, with interventions in only 16% of the total area of the basin.