Four Decades of Hydrological Process Simulation of the Itacaiúnas River Watershed, Southeast Amazon

Abstract

The impacts of anthropogenic degradation are becoming increasingly more evident in the Amazon and are jeopardizing its environmental systems and water resources, particularly in low monitored watersheds. Thus, the use of hydrological models is necessary to gain an understanding of these impacts on Amazonian river systems. The aim of this study was to analyze the simulation of some hydrological processes in the Itacaiúnas River watershed and its relation with human-induced impacts in the Southeast region of the Pará state using the Soil and Water Assessment Tool (SWAT) model. SWAT modeling requires several databases, such as relief, land use and land occupation, soil type, and climatic and hydrological variables. These data are input parameters for the SWAT model. The results showed that the hydrological variables in the Amazon tend to follow the seasonal precipitation cycle, with the highest values occurring between January and June and lowest between July and November. It was evident that base and

Forest fragmentation and its potential implications for the management of the Tarumã-Açu River basin, Central Amazon, Brazil

“…Duarte et al ( 2020) also recorded high rates of deforestation in CUs in the lower Acre River, Western Amazon. These changes in land use and coverage, plus the hyperdinamism of urban and periurban watersheds, increase the vulnerability to sediment transport, and consequently to the occurrence of erosion and silting of stretches of the drainage network (Serrão et al, 2019;Rocha and Lima, 2020).…”

Análise morfométrica da bacia hidrográfica do rio Piranhas-Açú: trecho do estado do Rio Grande do Norte

“…Tais análises permitem a atualização da bacia de drenagem, ou ainda, a geração de informações para bacias pouco estudadas. O conhecimento da rede de drenagem das bacias hidrográficas é importante em qualquer processo hidrológico, pois possibilita a avaliação do potencial e gestão de águas subterrâneas (SILVA et al, 2015;SILVA et al, 2016;SILVA et al, 2017;SILVA et al, 2018;SERRÃO et al, 2019a;SERRÃO et al, 2019b) Vários fenômenos hidrológicos podem ser correlacionados com as características fisiográficas de bacias hidrográficas como: tamanho, forma, inclinação da área de drenagem, densidade de drenagem e comprimento dos afluentes (RASTOGI et al, 1976).…”