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<br />Description
<br />and seeding
<br />
<br />of the
<br />rates,
<br />
<br />seeding devices, materials
<br />etc.
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<br />These particular Models, 17(30) or 21(60) were devdoped
<br />specifically for rain and snow increase operations., They':,
<br />have proven' efficient, safe,,, and need little maintenance.:",
<br />,The output of 0.5 or 2.0 grams, respectively, of silver
<br />iodide per unit per hour is in the range for optimum'
<br />efficiency., These particular models have been used for
<br />cloudseeding in Colorado since the mid '50s.
<br />
<br />The output of ice nuclei is approximately 5 xio14 per
<br />gram at about -17 degrees C.' ,An electri.c arc vaporizes
<br />silver iodide electrodes. A fan holds the arc in posi-:'
<br />tion,and quickly blows the nuclei outside the generator.
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<br />5) Description of how the project will be implemented
<br />and carried out
<br />
<br />eli'ent operates a minimum of four seasons out of six.
<br />,'In: consultation with the client, WRDC makes' a decision
<br />.' '.' to seed or not seed ,for any given year, based on current
<br />conditions and our long range ,weather forecast for the
<br />area.
<br />
<br />A feasibility study is prepared based on an,tecedeht,
<br />,meteorological conditions, 'current water storage, "and
<br />, the number of, favorable seeding situations anticipated,
<br />_for 'the season. This study aids in location of the gen-
<br />, erators.
<br />
<br />:,..-;.',
<br />
<br />,Method to be used by applicant to achieve said obj ecti ve
<br />,is the introduction of silver iodide from ground-based
<br />generators into all ~torms and cloud systems favorable
<br />,for significant' precipi tation increase. AgI plume width
<br />charts, AgIrising rate charts, seeding indexes, ancl--all
<br />in ,conjunction with detalled analysis of rasondes repre-
<br />sentativeof the airmasses forecast to influence the
<br />'target will be used. As soon as the AgI plumes are de-
<br />,veloped, the appropriate generator operators are phoned'
<br />and told to turn on their generators, and on the same
<br />call, a turnoff time is given, subject to change from
<br />the control laboratory. A continuous monitor of the
<br />, data makes it possible to modify the operation as wea-
<br />therchanges occur. A field technician located near
<br />the target'handles the installation and maintenance of
<br />gerterators.
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