RESILIENCE HYDROLOGIC STUDY
Specialized Consulting in Resilience and Risk Modeling - 01/2016
Uruguaiana - RS
Area of direct intervention: 45,3km2
População beneficiada: 125.435 people
The municipality of Uruguaiana has suffered with constant floods in recent years that directly affects hundreds of riverine families, and damage to structures and infrastructure of the city. In response to the full 2014 and with support of the Ministry of National Integration through the National Program of Urban Housing from the city environment in emergency, City Hall held the Hydrological Risk Diagnostic municipality, which the consulting modeling risks and hydrological resilience was part.
The objectives of the Hydrological Study of Resilience, therefore, were facilitating the decision making of the Municipal Government through technical information on the known problem of flooding of the Uruguay River. The role of consultancy, in this case, was supporting field surveys, as well as socioeconomic and housing diagnoses made by the municipality, acting in an interdisciplinary approach to research and processing of geographic data through satellites, surveys in loco and technical literature.
3C was responsible for preparation of study of the hydrological dynamics of the Rio Uruguay through modeling of lifting and calculations of return time data based on historical data and information on the subject of official agencies, such as the National Water Agency (HOME), Station Uruguaiana Fluvial of the Navy of Brazil and even the Naval Prefecture of Paso de los Libres, in Argentine.
The work consisted of three steps: the delimitation of areas affected by floods for Return Times 1, 3, 5, 10, 25 and 50 years; the location and quantification of the affected houses and the classification of these houses as their exposure to risk by reference to the return times. To conclude these stages, However, It was necessary to model secondary data from various sources, desde a plataforma Hidroweb da ANA e do modelo digital do terreno ASTER GDEM-v2, which they were integrated into a model and calibrated by surveys in loco that were available. To calculate the Return Times, It used the time series of the Police Fluvial rule (with daily records from 1942), which was integrated into the official mapping system IBGE.
From the study, They were identified and located 933 houses that would be achieved for the full up 50 years, with a third of them being affected in periods shorter than 10 years. This means that about 320 famílias (upcoming 1.000 people) They must be hit by floods every decade. If no action planning, mitigation and even relocation, all these families will be forced to rebuild their lives after each disaster, involving great personal costs and public power, in addition to risk the lives and health of these citizens.
From work, social work teams of the municipality can act in a coordinated manner, validating the latest flood occurrences of records within a broader context, giving more efficiency to field studies and allowing their inclusion in order to appeal to the Federal Government.
Arq. Alexandre Pereira Santos (Coordinator)
Arq. Tiago Holzmann da Silva
Arq. Leonardo Damiani Poletti
Arq. Leonardo Marques Hortencio
Arq. Carlos do Canto