Análise de áreas de risco, caracterização e avaliação das mudanças na rede de drenagem do município de Parauapebas – PA

Abstract

Parauapebas city is demographically and disorderly growing every day, and going through several changes in its landscape. These profound changes has occurred irregularly, not having a proper concern and proper planning with the environment as a whole, thereby causing mainly deforestation of native forest, building houses, avenues, streets and sidewalks on this space, affecting decrease in soil permeability. Population contributes and influences directly building houses on the banks of rivers, throwing way garbage improperly on the streets, avenues and areas near of drainage, thus, hampering the flow of rivers worsening torrents and floods that occur. Another major aggravation that city is going through is hills destruction and ground drainage. These human activities generate areas that were already prone to floods during period of high rainfall rate of the river, implies more intense floods, and ephemera floods out of season. Rivers that run through the city suffer a significant change in its solid load, where carried sediments by river energy being higher than it is normally exercised. Purpose of this paper is describe briefly these problems being caused in the city and propose a set of measures to minimize effects of urban flooding in areas, so they may have an infiltration increase capacity of rain water in soil and slowing water flow in rivers, thereby reducing potential social and environmental disorders that population lives.