stable

Register: Measurement/observing method (terrestrial and hydrological)

URI: http://codes.wmo.int/wmdr/ObservingMethodTerrestrial

Measurement/observing method (terrestrial and hydrological)

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changed on 14 Nov 2022 15:37:11.235
submitted bykurt-hectic
accepted on 29 Apr 2020 14:36:18.471

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Contents

Name Notation Description Types Status
Gravimetric moisture determination 126 Measurement of the amount of water in soil by weighing a samp... Concept stable
Soil heat flux plate 128 Concept stable
Neutron probe 159 Measurement of the moisture content and hence the porosity of... Concept stable
Electrical resistance blocks (Porous blocks) 187 Determination of electrical resistance between two electrodes... Concept stable
Soil thermometer 194 Concept stable
Tensiometer 200 Measurement of soil capillary tension by means of a porous cu... Concept stable
Time domain reflectometry (TDR) 203 Estimation of water content in unsaturated materials based on... Concept stable
Ultrasonic ranging 260 Transmission of an ultrasonic pulse towards the target and li... Concept stable
Graduated device 261 Manual measurement or observation made with a graduated fixed... Concept stable
Snow pillows and snow scales 262 Weighing of snow-cover mass per unit area. Concept stable
Laser ranging 344 Emission of a modulated beam of light in the visible spectrum... Concept stable
Echo sounding 345 Evaluation of the return time of acoustic waves emitted into ... Concept stable
Frequency domain reflectometry 346 Measurement of soil capacitance by means of radio frequency w... Concept stable
Gamma-ray attenuation 347 Determination of gamma-ray attenuation at given depth of soil... Concept stable
Non-recording gauge 348 Determination of water stage by means of a non-recording gaug... Concept stable
Staff gauge 349 Determination of water stage by means of a graduated vertical... Concept stable
Inclined gauge 350 Determination of water stage by means of a non-vertical scale... Concept stable
Wire-weight gauge 351 Determination of water stage by means of a fine cable or wire... Concept stable
Point gauge 352 Level measurement gauge, the essential element of which is a ... Concept stable
Maximum-stage gauge 353 Determination of the elevation of the flood crest by the adhe... Concept stable
Recording gauge 354 Determination of water stage by means of a recording gauge, f... Concept stable
Wire-float recording gauge (hydrograph) 355 Determination of water stage by means of a gauge consisting o... Concept stable
Pressure-actuated recording gauge 356 Recording gauge operating on the principle that static pressu... Concept stable
Velocity-area method 357 Method of determining the discharge of a stream by measuring ... Concept stable
Float gauging 358 Measurement of the velocity of a stream by means of timing th... Concept stable
Dilution gauging 359 Determination of the discharge of a stream by measuring the d... Concept stable
Slope-area method 360 Determination of the discharge in a reach which is based on t... Concept stable
Measuring weir 361 Determination of the discharge of a stream by means of a devi... Concept stable
Flume 362 Determination of the discharge of a stream by means of a man-... Concept stable
Stage-discharge relation 363 Determination of the discharge of a stream by means of a rela... Concept stable
Water current meter 364 Determination of water velocity by means of a current meter, ... Concept stable
Cup-type current meter 365 Determination of water velocity by means of a current meter w... Concept stable
Propeller-type current meter 366 Determination of water velocity by means of a current meter i... Concept stable
Acoustic (ultrasonic) velocity meter 367 Measurement of the difference in travel time of acoustic (ult... Concept stable
Acoustic doppler current profiler (ADCP) 368 An instrument that uses an acoustic doppler transducer to mea... Concept stable
Acoustic doppler current meter 369 Determination of stream velocity by means of an acoustic Dopp... Concept stable
Optical or nuclear suspended-sediment gauge 370 Determination of the decrease of intensity of a visible light... Concept stable
Gravimetric sediment measurement 371 Estimation of the total sediment in a water sample by allowin... Concept stable
Displacement method of sediments 372 Determination of sediment concentration by the measurement of... Concept stable
Water discharge-sediment discharge rating curve 373 An empirical relationship relating sediment discharge and str... Concept stable
Water discharge-bed material rating curve 374 An empirical relationship relating bed-material discharge and... Concept stable
Volumetric method 375 A process for measuring the discharge of a well, spring, or s... Concept stable
inapplicable inapplicable None of the codes in the table are applicable in the context ... Concept stable
unknown unknown The measurement/observing method is unknown. Concept stable