TITLE:
Drainage and Preliminary Risk of Flooding in an Urban Zone of Eastern Amazon
AUTHORS:
Taís Silva Sousa, Clezio Júnior Teixeira Viegas, Helenilza Ferreira Albuquerque Cunha, Alan Cavalcanti da Cunha
KEYWORDS:
Drainage System, Environmental Salubrity Index, Groundwater, GIS
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.11 No.5,
May
19,
2023
ABSTRACT: Drainage system is a poorly investigated basic sanitation and urban
planning issue in the Amazon, which is often related to flooding processes and
public health. The aim of the present research is to correlate Preliminary Risk
of Flooding (PRF) to independent variables, based on the following methodology:
1) identifying and classifying risk areas by using the Geographic Information
System (GIS) and 2) statistically correlating risk to sanitary and
environmental variables. Results have shown that preliminary risk is correlated
to, at least, seven sanitary and environmental variables, depending on flood
influence area; and there are significant correlations observed in the rainy
season interval [probability or significance (p) 0.05]. In conclusion, PRF is higher in the rainy season, but it is
spatially influenced by the elevation of terrain, number of flooding points,
drainage typology and Environmental Salubrity Index (ESI) of neighborhoods,
which directly affect the water quality in nearby groundwater wells (Total
Coliforms, nitrate (NO3) and ammonia (NH3)). However,
this influence can eventually significantly change in the dry season.