Identifying Effective Components on Applying Nature-based Runoff Management Approaches in Local Streets of Tehran by Cross Impact Analysis (CIA)

Document Type : Research Paper

Authors

1 School of Architecture, College of Fine Arts, University of Tehran, Tehran. Iran.

2 Department of Environmental Design Enginering, Faculty of Environment, University of Tehran, Tehran, Iran.

Abstract

The current urban runoff management approach in Tehran is a structural approach which its main purpose is to collect and transfer runoff out of the city. However, nature-based approaches emphasize the maximum absorption as near as the source of runoff and apply interdisciplinary perspectives to achieve it. This research pursues two main goals in order to provide the basis for the application of nature-based approaches in the local streets of city of Tehran, Iran: 1) identifying of disciplines and main variables of the nature-based urban drainage approaches, and 2) identifying the role each variable plays in implementing these approaches in Tehran in the current situation. First, a theoretical model of the disciplines and variables has been develops based on literature review. Second, the role of each variable from the point of view of experts was investigated by using Cross Impact Analysis (CIA) method with the tool of MicMac software. The results show that in the current situation, ‘runoff speed and volume’ as an influential variable has the most important role on implementation of these new approaches in urban runoff management in Tehran local streets. And variables of ‘street profile’, ‘land use’, ‘activities’, and ‘planting’ as well as ‘economic feasibility’ are linkage variables. Other variables are either dependent or do not have high priority in the current situation. The results of the research place special emphasis on interdisciplinary teamwork between the specialties of water sciences and urban landscape as well as economics to provide the basis for the application of these approaches.

Keywords


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