Banca de QUALIFICAÇÃO: JOÃO PEDRO SILVA SANTOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JOÃO PEDRO SILVA SANTOS
DATE: 03/07/2026
TIME: 15:00
LOCAL: Sala de aula do Laboratório de Hidráulica
TITLE:

Soil water content monitoring in environments with automatic irrigation activation

KEY WORDS:

 TDR, FDR, Tensiometry, Smart Irrigation, Instrumentation.

PAGES: 20
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUBÁREA: Engenharia de Água e Solo
SPECIALTY: Irrigação e Drenagem
SUMMARY:

Irrigation management involves decisions regarding the quantity of water to be applied and the frequency of irrigation, both of which are linked to monitoring soil water content. Various sensors can be employed in irrigation management; when integrated into an automation system, they enable precise water delivery to plants, thereby reducing uncertainty and human interference in the process. For controllers to operate effectively, activation parameters—such as threshold values for the response variables of the sensors used—must be defined. Given the range of sensors available on the market and the need for calibration and an understanding of automatic actuator activation parameters, this study aims to compare different soil water content monitoring methods and evaluate the performance of an Automatic Irrigation Actuator developed at UFRRJ. Laboratory calibrations will be performed on sensors based on five methodologies, which will subsequently be applied to lettuce (*Lactuca sativa* L.) cultivation under automatic irrigation management. Five pots will be assigned to each management method—totaling 25 pots—and monitored daily, with sensor readings recorded for analysis. Irrigation will be controlled exclusively by the automatic irrigation actuator; this allows for the collection of data during system operation, enabling an evaluation of its performance in meeting the crop's water requirements. The study is expected to yield valuable information for refining the device, as well as data to assess the most suitable application for each management method.

COMMITTEE MEMBERS:
Presidente - 1224578 - DANIEL FONSECA DE CARVALHO
Interno - 2132414 - MARINALDO FERREIRA PINTO
Externa ao Programa - 3321101 - DINARA GRASIELA ALVES - UFRRJ