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BOARD00272
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Last modified
8/16/2009 2:48:04 PM
Creation date
10/4/2006 6:34:42 AM
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Board Meetings
Board Meeting Date
7/28/2003
Description
Flood Section - Weather Modification Program
Board Meetings - Doc Type
Memo
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<br /> <br />. <br /> <br /> <br />. <br /> <br />of a better term are jealous, because they believe that the most cost effective means of seeding is ground <br />base operations and the best terrain for this technology is mountainous high elevation terrain of the Rocky <br />Mountains. There are many uncertainties with this technology but they don't revolve around the question . <br />"Does silver iodide make ice crystals that then fall into snow" there are at least seven other arid western <br />states working with this same technology, The uncertainties revolve around trying to accurately quantify <br />the positive effects of seeding in snowpack and link them to. stream flow and reservoir storage for water <br />managers. To carefully develop this resource management tool incorporating monitoring, evaluation and <br />coordination with local interests, Careful attention should also be paid to negative effects to the mountain <br />and aquatic environment, long-term effects on our state level macroclimate, flooding and erosion as some <br />examples. Future directions of the CWCB and the State of Colorado weather modification-permitting <br />program should include the following considerations. <br /> <br />Program Recommendation: <br />1. Expanding the current weather modification program to include an annual appropriation <br />from the construction fund of $10-15,000 yearly for the administration and development of this <br />program. <br /> <br />2. Make grants of ($5K-IOK) andlor loans available to cost share with medium to low-income <br />municipalities, conservation and water conservancy districts in cloud seeding programs. The <br />State of Utah Department of Water Resources has had grants available for nearly 10 years, <br /> <br />3. Expand the state's coordination and funding match in research and scientific studies related <br />to weather modification that could directly benefit the science as it relates to snowpack <br />enhancement. <br /> <br />4. Explore new weather modification studies and development of new technologies, a BOR . <br />report states that silver iodide generators may be less efficient than liquid propane generators at <br />the highest elevations. Colder temperatures are better for the ice crystal formulation process but <br />dispersion seems to be an issue. The CWCB staff-believes that silver iodide generators do work <br />and are currently the most cost efficient means for programs. But possibly a mixture of the two <br />generator types might be explored in future years. It is evident that advances in technology, <br />numerical modeling, and physical measurements. would only strengthen this science and its <br />application in resource management. <br /> <br />5. Explore the validity and possible revision of' suspension criteria to levels that are more <br />moderate than the current suspension criteria levels but still allow for snowpack augmentation to <br />reasonable levels. The CWCB staff suspects that SWE levels may be generally set too high and in <br />certain cases like in the Climax Mine case for the Denver Water Permit were tightened at <br />SNOTEL sites near drainages that affect Climax Mine. Other identified sensitive areas may <br />require tighter suspension criteria in the future. <br /> <br />6. Expand the state's weather modification pro~ram to include educational elements to this <br />science as it is misunderstood and has been misrepresented to the public. There is only a small <br />family of approximately 200 individuals in the whole nation working in this specific field and <br />their efforts are concentrated in science and operations not education. <br /> <br />4 <br />
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