THE HIDROGEOS-NEGRO Project in Anavilhanas Archipelago, Novo Airão (AM)

initial results

Abstract

Information about the quality and quantity of water resources is essential for environmental management and better decision-making. This paper presents the data set acquired by the HIDROGEOS-NEGRO Project. The objective of this project was investigated the spatial and temporal variation of the water and material flows transported in the channels of the Anavilhanas archipelago. During the 2016-2017 hydrological year, seven field trips were carried out for data acquisition in a 200 km stretch of the lower Negro river. During this period, 70 hydrological measurements, 151 radiometric data acquisitions, 439 samples of suspended sediments, 90 dissolved organic carbon and 105 limnological data were collected. The water discharge ranged from 1.044 to 13.399 m³ s^-¹ in the Anavilhanas channels, with water flow flowing at very low velocity (0,26 a 0,57 m s-¹). The physical-chemical parameters of the Negro river stand out in the environment of low pH (4,90), high temperature (30,25 °C), high dissolved organic matter (9.52 mg L^-1) and low concentration of suspended sediment (3,06 mg L^-1) in Anavilhanas. This data set will serve as a baseline for comparison with studies of impact evaluation of hydropower dams planned for the Branco river, as well as support for environmental monitoring and decision-making for management of the Mosaic of Protected Areas of the Lower Rio Negro