There are various constraints in any decision-making process in flood management, which can be broadly categorized into: physical, financial, social, political, legal and environmental. Physical and financial considerations have largely been tackled through economic analysis with little or no attention to social and environmental concerns.
These concerns are related to societal values, either regarding the perceptions of risks or the trade-offs between development and environmental preservation. In order to minimize the role of subjective factors there is need for an environmentally sensitive framework to be established within decision-making processes. As a framework, Environmental Impact Assessment identifies the environmental and social impacts of a proposed project prior to decision-making in order to predict environmental impacts at an early stage in project planning and design.
For more information, please refer to “Applying Environmental Assessment for Flood Management“, Chapter 3”.