Seite - 1090 - in Book of Full Papers - Symposium Hydro Engineering

height over time, and a level scale. The air temperature and humidity are measured in an automated weather station. The concrete temperature is measured in 52 electrical resistance thermometers distributed across the dam thickness of several blocks. The location of the thermometers was defined taking into account the set of the others electrical resistance devices (strain gauges, embedded jointmeters and strain gauges) that also allow the measurement of the concrete temperature. The foundation temperature is measured in 13 temperature sensors distributed in several rod extensometers. Displacements are measured using an integrated system that includes 5 pendulums, 24 rod extensometers and geodetic observations. The relative movements between blocks are measured by 103 superficial and 152 embedded jointmeters. The deformation of the concrete is measured with electrical strain gauges arranged in groups, distributed in radial sections, allowing the determination of the stress state through the knowledge of the deformation state and of the deformability law of the concrete. The drained and the infiltrated water are measured in the drainage system which includes 216 drains and 19 weirs. These last devices differentiate the total quantity of water that flows in the drainage gallery in several zones of the dam. The measurement of the uplift pressure in the foundation is performed by a piezometric network that comprises 41 piezometers. 2.2. THE AUTOMATED MONITORING SYSTEM OF THE BAIXO SABOR DAM A real-time data acquisition system for the auscultation instrumentation (ADAS) has been installed at Baixo Sabor dam, allowing the measurement of the following physical quantities [2]:  Horizontal movements based on the pendulum method through the use of optical telecoordinometers (4-20mA signal);  Vertical movements through rod strain meters with position transducer, vibrating wire type;  Discharges through level gauges with ultrasonic sensors (4-20mA signal);  Pressures through piezometers with pressure transducers, vibrating wire type;  Relative movements between blocks through 3D jointmeters with position transducer, vibrating wire type, located in the inspection galleries;  Relative movements between blocks through 1D jointmeters with resistance transducer, Carlson type, embedded in the concrete dam body;  Concrete strain through strain meters with resistance strain meter transducers, Carlson type, embedded in the concrete dam body;  Concrete temperature through thermometers with resistance thermometer transducers, Carlson type. 1090