Water Dynamics in an Infiltration Trench in an Urban Centre in Brazil: Monitoring and Modelling

Paulo Henrique Lopes Bezerra,Tassia Dos Anjos Tenório De Melo,Suzana Maria Gico Lima Montenegro,Severino Martins Dos Santos Neto,Artur Paiva Coutinho,Antonio Celso Dantas Antonino,Rafael Angulo-Jaramillo,Laurent Lassabatere

doi:10.3390/w14040513

Paulo Henrique Lopes Bezerra, Tassia Dos Anjos Tenório De Melo + Show 6 more

Open Access

https://doi.org/10.3390/w14040513

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Journal: Water	Publication Date: Feb 9, 2022
Citations: 2	License type: CC BY 4.0

Affiliation: Universidade Federal de Pernambuco

Abstract

Infiltration trenches are compensatory techniques that consist of a reservoir filled with granular material. Their function is to store and infiltrate runoff water generated by rainfall. The objective of this work was to evaluate the hydraulic performance and model the water dynamics of an infiltration trench installed in the city of Recife, Pernambuco, Brazil. For each event, the response time of the infiltration system, the percentage of the infiltrated volume and the dynamics of water storage processes were analyzed as a function of rainfall events. The Puls method was used to model the events. The monitoring data demonstrated that the infiltration trench had a positive performance, infiltrating a large part of the drained volume, even with system overflows. The analyzed events presented an average emptying time of 6 days. The infiltration trench achieved its objective of decreasing the volume drained on the surface. The application of the Puls method in simulations of the monitored events showed satisfactory results in the statistical criteria coefficient of determination, deviation ratio and coefficient of residual mass, obtaining efficient adjustments, apart from a few exceptions. This study allowed us to prove the positive contribution of the trench to the water budget.

Highlights

As the population increases in urban centres, impervious surfaces expand through the construction of new buildings
Have emerged as means of reducing effective precipitation and assisting in water source control [10]. These alternative techniques include the comprehension of adverse urbanization effects, aiming to act on the causes of hydrological impacts
The infiltration trench of this study is located in the city of Recife, Pernambuco StateBrazil, more precisely in the Department of Nuclear Energy at the Federal University of Pernambuco (Figure 1)

Summary

Introduction

As the population increases in urban centres, impervious surfaces expand through the construction of new buildings This expansion, combined with poor urban planning and lack of control over land use and occupation, alters the balance of hydrological cycle components, such as runoff, infiltration and natural aquifer recharge [1,2]. Have emerged as means of reducing effective precipitation and assisting in water source control [10] These alternative techniques include the comprehension of adverse urbanization effects, aiming to act on the causes of hydrological impacts. They operate in the processes of storage, detention, retention, interception, evapotranspiration and rainwater infiltration [11]. Stormwater detention, storage and infiltration techniques have been proposed as mechanisms to preserve natural runoff, reducing downstream flows, maximizing runoff control at the source and preventing adverse effects on the city and its population

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