EXPORT COEFFICIENTS VARIABILITY ANALYSIS ON NONPOINT POLLUTION MODELING

Código

XXIV-SBRH0595

Autores

Ariel Ali Bento Magalhães, Fábio Paiva da Silva, Fábio Ferreira Nogueira, Maria Cristina Santana Pereira, Lais Ferrer Amorim de Oliveira, Barbara Pozzan dos Santos Duarte, José Rodolfo Scarati Martins

Tema

SR02- Processos hidrológicos e meio ambiente

Resumo

All over the world, there has been a major concern about pollution on surface waters. point sources pollutants (from sewage treatment plants, industrial releases, etc.) are easily recogzinable and traceble and frequently the highly contaminant; nonetheless, non-point pollution (surface runoff, forest cutting, fertilizers from crop lands, etc.) are being counted responsible for, sometimes, more than 30% of the total load in surface waters. Thus, it is essential to develop methods to quantify the pollutant loads found in surface flows, to design projects and engineering structures that reduce or prevent nonpoint pollution. Nonpoint loads can be quantified and estimated by several methods, such as: Exports Coefficients (EC) or Unit Loads (UL); Event Mean Concentration (EMC); Mathematical Simulation Models; or even combinations, improving reliability. The general goal of this paper therefore is to provide a framework to estimate the pollutants unit loads and a brief tracking and comparison of how Unit Loads are obtained around the world and its values. Results show that Export Coefficients (EC) are a simple, easy and quick method to predict pollution, although some studies tend to focus a lot on yearly production plus many are not as calibrated with observed data. Nevertheless, the regular track of the variability of the EC in the catchment might be the key for planning and managing pollution