Dam Behavior Measurement Instruments

The dam behavior measurement instrument is a built-in instrument to monitor the safety of the dam during construction and after retaining water. With small dams, it is popular to use measurement by Manual Readings. For medium and large dams, it is popular to use automatic measurements (Automatic Reading)
 

3.1 Instruments for measuring water level and water pressure   Observation Well used to examine the groundwater level, Piezometer An Instrument to measure water pressure under the dam and find out the Pore Water Pressure, Reservoir water level meter, Seepage Flowmeter An instrument used to measure the seepage of dams and foundations.

                       

Observation Well
 

                       

Piezometer
 

                        

Reservoir water level meter

 

                          

Seepage Flowmeter


3.2 Dam movement measuring Instruments   Vertical Inclinometer An instrument to measure the movement of the dam in a horizontal plane to measure the movement of the soil mass deep under the dam, In-place Inclinometer, SAA, etc.
                                               
 

                 


3.3 Dam Settlement Measurement Instrument   The vertical dam motion measurement tools include - Surface Settlement point, to measure surface subsidence. Benchmark, Magnetic Extensometer, Rod Extensometer, Cross -Arm, etc.

                    


3.4 Seismic wave detector Accelerograph  A Strong Motion Accelerograph (SMA) is a tool designed to measure vibrations with the objective to find the acceleration of the ground in that area caused by earthquakes.
 

                            

                     Signal recorder with built-in sensor                                                                                   GEODAS software


3.5 Weather Station Weather Stations are used to measure changes in the atmosphere. they include Climate measuring systems such as Rain gauges, Air Temperature & Relative Humidity measuring Instruments, Wind Speed and Direction measuring Instruments, Barometric Pressure measuring Instruments, Solar Radiation measuring Instruments, and Evaporation Gauges.

 

 

             


            


Rain Gauge
Air Temperature  & Relative Humidity                                                                                        
Win Speed and Direction      
Evaporation Gauge
เBarometric Pressure                                                                                                                               
Solar Radiation                                                                                                                                                                                                                                                                        
                                             

3.6. Automatic data measurement and long-distance data transmission system   An automatic datalogger is installed to store instrument data which can connect through channel amplifiers (Multiplexer). It can be connected to the transmission system via Wireless Lan Modules to send data to the company’s main computer at their office, which will have installed the STS-DMS program to interpret the data.