Register: Measurement/observing method (terrestrial and hydrological)
stable
URI: http://codes.wmo.int/wmdr/ObservingMethodTerrestrial
Measurement/observing method (terrestrial and hydrological)
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 |
Electromagnetic current meter | 376 | Determination of water velocity based on the principle that a... | Concept | stable |
Stream index-velocity rating | 377 | Computation of stream discharge based on a relation between s... | Concept | stable |
Acoustic doppler velocity meter (ADVM) | 378 | Determination of water velocity by using the Doppler principl... | 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 |