A method of streamflow routing which assumes that storage is a linear function of the weighted flow in the reach and is adaptable to a simple mathematical solution.

The humidity transducinu element in a Diamond-Hinman radiosonde. Also called electrolytic strip.

Video Display Terminal. An input and display device which includes a keyboard and a screen and allows a human to communicate with a computer.

A photometer which measures the intensity of radiation as a function of the frequency (or wavelength) of the radiation.

A pyrheliometer of the bimetallic type used to measure the intensity of direct solar radiation.

Same as atmospheric pressure.

A unit of illuminance or illumination equal to one lumen per foot'. This is the illuminance provided by a light source of one candle at a distance of one foot.

Thermodynamic change of state of a system in which there is transfer of heat across the boundaries of the system. Compare to adiabatic process.

The stage, on a fixed river gauge, corresponding to the top of the lowest banks within the reach for which the gauge is used as an index. Compare to flood stage.

A large plastic constant-level balloon for duration flying (in excess of 24 hours) at altitudes above 40,000 feet, used for the determination of wind fields and the measurement of upper atmospheric parameters.

Temperature of equilibrium between the liquid and vapor phases of a substance at a given pressure.

A flower-like diagram indicating the relative frequencies of different wind directions for a given station and period of time.

In a system of moist air, the ratio of the mass of water vapor to the total volume of the system. Usually expressed as grams per cubic meter (g/m3).

The programs and instructions which direct a computer.

The center of an area of high pressure, usually accompanied by anticyclonic and outward wind flow. Also known as an anticyclone.

In the direction from which the wind is blowing.

The algebraic difference between the upper and lower limits of the measuring range of an instrument, i.e. a thermometer with a range of -35 to 50

A direct-vision nephoscope which is constructed in the following manner: a comb consisting of a crosspiece containing equispaced vertical rods is attached to one end of a column eight to ten feet long and is supported on a mounting that is free to rotate ...

A rain gauge which indicates but does not record the amount of precipitation captured.

A remote indicator for wind speed and direction used in conjunction with a contact anemometer and a wind vane. The indicator consists of a center light, connected to the contact anemometer, surrounded by eight equally spaced lights which are individually ...