Term No. | Term Name/Term Description | Action |
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16 |
Primary sample | A sample taken from a population during the preliminary stage of multistage sampling. | | Similar Terms |
33 |
Sample size | The expanse of sampling units which are to be included in the sample. | | Similar Terms |
44 |
Sample | 1 - A part of a population, or a subset from a set of units, that is provided by some process, usually a deliberate selection with the object of investigating the properties of the parent population or set. 2 - The data or the observations numbers that have been observed...... | | Similar Terms |
106 |
Average sample number | The average number of sample units inspected per lot in reaching a decision to accept or reject. It is dependent on the actual quality level of the lot in question...... | | Similar Terms |
824 |
Snow sample | A core taken from a snow mantle by means of a snow sampler, from which the depth and density and equivalent water content may be determined...... | | Similar Terms |
825 |
Snow sampler | An apparatus for measuring snow depth and density. | | Similar Terms |
1359 |
Sediment sample | Determination of physical/chemical characteristics of sediment sample. | | Similar Terms |
1360 |
Median size, or Diameter | The particle size of sediment that carries finer particles are 50 per cent by weight obtained graphically by locating the diameter associated with the midpoint of the particle size distribution...... | | Similar Terms |
1361 |
Particle size distribution | The relative amount of a sediment sample having a specific size, usually in terms of percentage (by weight) finer than a given size...... | | Similar Terms |
1365 |
Instantaneous sampler | A suspended sediment sampler which instantaneously traps and draws a representative specimen of the water-sediment mixture in a stream at a desired depth and time...... | | Similar Terms |
1654 |
Effective size of grain | The effective size of a grain of a granular material is the diameter of the grains in an assumed material that has the same coefficient of permeability as the material under consideration and is composed of spherical grains of equal size and arranged in a specified manner...... | | Similar Terms |
2669 |
Undisturbed sample | A soil sample that has been obtained by methods where every precaution has been taken to minimize disturbance to the sample...... | | Similar Terms |
4800 |
Nominal diameter or size of a valve | The nominal diameter or thread size of the pipe to which a valve can be connected without intermediate fitting. If in valve inlet and outlet are not the same size, the diameter of the smaller of the two...... | | Similar Terms |
5136 |
Particle size distribution | Distribution of equivalent diameters of soil particles; usually expressed in terms of cumulative percentages larger or smaller than each of a series of diameters (sieve openings)...... | | Similar Terms |
5666 |
Particle size of aggregate | Generally refers to the distribution of size ranges of particles in an aggregate mix, as determined by a standard set of sieves...... | | Similar Terms |
6271 |
Suspended sediment sampler | A sampler used to collect water samples from a stream for analysis of suspended particle concentration. May operate automatically...... | | Similar Terms |
7518 |
Composite water sample | A mixture of two or more sub‑samples in appropriate known proportions from which the average result of a desired characteristics may be obtained. The proportions are usually based on time or flow measurements...... | | Similar Terms |
7936 |
| Similar Terms |
8679 |
Bottle silt sampler | A kind of silt sampler used for collection of suspended silt load in a stream. It consists of a frame suspended from a pipe, holding a one-litre bottle fitted with a rubber stopper that is operated by a lever at the top of the suspension pipe...... | | Similar Terms |
8680 |
Bed material sampler | An instrument or apparatus to sample the bed material of a stream, reservoir or lake. | | Similar Terms |
8681 |
Point integrating sediment sampler | A device to take a sample of suspended sediment in a stream. The sampler is lowered to a given level below the stream surface, the pressure inside and outside the sampler is equalized to prevent a sudden inrush. The sample is taken over a period of time , after which the sampler is closed and raised to the surface so that the sample can be removed...... | | Similar Terms |
8682 |
Depth integrating sediment sampler | A device to take a sample of suspended sediment in a stream. It is lowered from the stream surface to the bed and raised to the surface again at a constant rate. The sample of sediment-laden water is continuously drawn in to obtain a composite sample that is integrated over the depth of the stream...... | | Similar Terms |
8683 |
Bed load sampler | An instrument or piece of equipment that allows samples of bed load sediments to be removed from alluvial channels, for determination of particle size distribution, particle composition, transport rate or other...... | | Similar Terms |
8704 |
Silt sampler | An apparatus for taking samples of silt as bed load or suspended load, in flowing water. | | Similar Terms |