Dimensionamento de trincheiras de detenção para um condomínio residencial na cidade de Dourados, Mato Grosso do Sul, Brasil

Abstract

The Brazilian urbanization process generated significant changes in the environment and, in particular, in the hydrological cycle. The water flow that before gradually drained through the vegetated soil, began to flow through conduits and impermeable surfaces, a fact that caused greater peaks of flow in the hydrographic basins and disasters such as floods. Seeing that this situation has become unsustainable with the continuous growth of cities, a new proposal emerged in developed countries that aims to rebuild the natural cycle and favor the dampening of outflows. And so, the proposal of this ungraduated thesis emerged, which deals with the dimensioning of detention trenches for a condominium in the city of Dourados, MS. For this purpose, the rainfall method was used, which provides an estimated volume of storage capacity, in addition to the dimensions, operating time and emptying and exit diameter of the structures. Thus, it was found that the values of storage volume and emptying time were satisfactory, as they reached the parameters defined by the bibliography. Regarding the damping of the outflow, there was a reduction of 83.1%, compared to that obtained by the rational method of conventional drainage, thus showing a significant decrease in the flow drained downstream.