Hydrometeorological monitoring deals with monitoring the branches of the water cycle on the surface and in the atmosphere. The management of this data includes actions for collecting, treating, storing, retrieving and making available historical information about atmospheric conditions and river flow. The process is carried out by a network of hydrometric stations, divided into pluviometric and fluviometric stations, in addition to meteorological stations.

This monitoring constitutes one of the fundamental steps for the elaboration of water resources plans, framing of water bodies, granting of water use rights, charging for uses, among other instruments of the State Water Resources Policy.

Currently, the body responsible for monitoring is the State Institute for the Environment (INEA). The process gathers quantitative and qualitative information.

Quantitative monitoring of hydrographic basins includes monitoring and recording the amount of rain, water levels in rivers, solar radiation, temperature, humidity, winds, among other parameters. This control must be continuous, as it is extremely important for water resources management bodies, both in the prevention and control of floods and in the assessment of water availability in the region. Click here to learn more.

Quality monitoring, on the other hand, is an important environmental management tool and consists of analyzing the conditions of the water, sediment and biota distributed in rivers, bays, lakes and reservoirs in the State. Monitoring provides information necessary for the proper management of these aquatic ecosystems, enabling a better understanding of the environment and effective allocation of investments and actions. This survey is aimed at the scientific community, the general public and, mainly, at the different decision-making bodies. Click here and find out how this monitoring is done and follow the water quality bulletins here.

In addition to INEA, the National Water Agency (ANA) also makes available hydro-meteorological data for the entire country on the HidroWeb Portal.

Situation of reservoirs

The monitoring of reservoirs, as a water resource management instrument, consists of monitoring their water levels and the flow of affluent and effluents to them, serving as a support for decision-making on their operation, in order to allow the multiple use of water resources.

The Paraíba do Sul River Basin Water Pro-Management Association (AGEVAP) carried out studies that contemplate the situation and operation of the reservoirs in Hydrographic Region II, available for consultation at the links below:

Technical Report – Paraíba do Sul River Basin – Subsidies for Management Improvement Actions 2011
Technical Report on the situation of Reservoirs with subsidies for actions to improve Management in the Paraíba do Sul River Basin 2010

The National Water Agency (ANA) publishes monthly, through the Multiple Uses Superintendence (SUM), seven monitoring bulletins referring to the reservoirs of the São Francisco River, in the Northeast, of the Hydraulic System of the Paraíba do Sul River, of the Cantareira System, Furnas, Alto Paraguai and the Doce river. ANA is also preparing the Amazon Monitoring Bulletin.

The National Electric System Operator (ONS) discloses the daily monitoring of the Situation of Reservoirs. ANA bulletins and reports issued by ONS can be accessed at:

ANA – Boletins de Monitoramento
Relatórios do ONS

Since 2016, the Geographical and Geoenvironmental Information System of the Guandu, Guarda and Guandu-Mirim Rivers Hydrographic Basins (SIGA-GUANDU) has been available to the public, which aims to assist decision-making in the watershed management process. Through a set of solutions that support the monitoring and monitoring of data from hydrological and meteorological stations, facilitate the creation and update of data on the hydrographic basins of the Guandu, Guarda and Guandu-Mirim rivers, and also enable the dissemination From information on the qualitative and quantitative situation of water resources, SIGA-GUANDU serves as a basis for the decentralization of data collection and production, to guarantee society access to information and, above all, to enable the unified coordination of the hydrographic basin.

One of the results of this project is the Situation Room. In it, it is possible to monitor the flow and level of the reservoirs in the Paraíba do Sul river basin and in the Guandu, Guarda and Guandu-Mirim river basins. This information is updated daily, automatically, as the data is published by the National Water Agency (ANA). Also available in this area are daily, weekly and monthly reservoir reports, a link to access other telemetry data on the ANA website, weather forecast information for each municipality in the basin and other important links.