The Analysis of New Assessment Method Based on Region Tracking for Artificial Precipitation Enhancement

Based on the method of tracking the seeding coverage in artificial precipitation enhancement by antiaircraft guns, this study pre-sented ideas of selecting the equal-area concentric rings around the seeding coverage as the contrast area, building the new physical assess-ment for artificial precipitation enhancement and giving adaptive judgment index. We calculated the difference of every physical quantities between "the seeding coverage" and "the contrast area" by double ratio and relative deviation and so on during different durations in differ-ent type of natural precipitations with selecting vertical integrated liquid water( VIL) and the area precipitation as test factors. We showed the scope of the new assessment and the specific situations in which the difference of every physical quantities between "the seeding cover-age" and "the contrast area" is same as or less than that in artificial precipitation enhancement with considering similar dispersion as an in-dicator. The results showed that in different type of natural precipitations, the average difference of vertical integrated liquid water in 30 minutes and the area precipitation in 3 hours between "the seeding coverage" and "the contrast area" were less than that in artificial precip-itation enhancement. Finally, a concept of compensation coefficient of comprehensive similarity dispersion was presented. When its value was less than 0.2, the new assessment is considered valid.. Clearly, the addition of the new criterion greatly improved the effective evalua-tion.