Scenarios for urban drainage on a Legal Amazon planned city: a case study in Palmas, Brazil

Frederico Coli Mendes,Rui Da Silva Andrade

doi:10.1590/s1413-415220190019

Abstract

ABSTRACT The significant urbanization of Brazil in the last decades has pushed cities to combine population growth with protection and harmonic living with their natural resources. The city of Palmas, a planned city in the Legal Amazon, is inserted in this context. In this sense, this study sought to analyze the hydrological and hydraulic responses to different scenarios of land use and occupation in one of its watersheds. Scenarios modeled with SWMM software were current, critical and compensatory techniques. The results showed that the conveyance system, including the main stream, are fully capable of conveying the affluent flow, even in the scenarios with greater impermeability of the watershed. The peak flow of the critical scenario is up to 11.12% higher than the current scenario. However, with compensatory techniques, it is possible to have a peak flow up to 25.76% smaller than the critical scenario.

Highlights

The context of human settlements has been marked, in recent decades, by an intense migration of people from rural to urban areas
The obtained height value is added to the storage parameter in the pervious area depressions of the subcatchment under analysis
The option passes through the easiness of structure execution and the area and depth are an option of the possible executor

Summary

Introduction

The context of human settlements has been marked, in recent decades, by an intense migration of people from rural to urban areas. In 1950, the urban population of Brazil and the world represented just 29.6 and 36.2%, respectively (UN, 2014). Considering these changes, public policy attention has been increasingly focused on the context of cities. Many of the Sustainable Development Goals (SDG), agreed upon by the UN member countries (UN, 2015), deal directly with or have an interface with urban structures and activities. In this sense, it is important to understand the behavior of urban watersheds and their relationship with land use and occupation. The National Plan for Adaptation to Climate Change emphasizes relative importance to the production and dissemination of scientific knowledge related to the modeling of climatic and hydrological phenomena (BRASIL, 2016)

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