stable
Register: Measurement/observing method (terrestrial and hydrological)
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 |
| 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 |