What sustainable measure did planners use in Curitiba to lessen the effects of flooding rivers on the city?Group of answer choicesForce the river into a concrete channelBuild a dam on the rivermove all settlements away from the riverAllow the river to flood into the parks

The sustainable measure that planners used in Curitiba to lessen the effects of flooding rivers on the city was to allow the river to flood into the parks. This approach not only helped to control flooding but also created green spaces for the city. Here are the steps explaining how it was done:

1. Identification of Flood-Prone Areas: The first step was to identify the areas of the city that were most prone to flooding. These areas were usually along the riverbanks.

2. Conversion into Parks: Once these areas were identified, the city planners decided to convert these flood-prone areas into parks. This was a sustainable solution as it not only helped to control the flooding but also provided the city with much-needed green spaces.

3. Design of Parks: The parks were designed in such a way that they could easily absorb the excess water during times of heavy rainfall. This helped to reduce the impact of the floods.

4. Regular Maintenance: Regular maintenance of these parks ensured that they were able to effectively serve their purpose of flood control.

5. Public Awareness: The city also worked on creating awareness among the public about the importance of these parks in controlling floods and the need to maintain and protect them.

This innovative and sustainable solution has been very effective in controlling floods in Curitiba and has also provided the city with beautiful and functional green spaces.