In this research, the result of the cloud seeding over Yazd province during three months of February, March and April in 1999 has been evaluated using the historical regression method. Hereupon, the rain-gages in Yazd province as the target stations and the rain-gages of the neighboring provinces as the control stations have been selected. The rainfall averages for the three aforementioned months through 25 years (1973-1997) in all control and target stations have been calculated. In the next step, the correlations between the rainfalls of control and target stations have been estimated about 75%, which indicates a good consistency in order to use the historical regression. Then, through the obtained liner correlation equation between the control and target stations the precipitation amount for February, March and April in 1999, over the target region (Yazd province) was estimated about 27.57 mm, whiles the observed amount was 34.23 mm. In fact the precipitation increasing around 19.5% over Yazd province confirmed the success of this cloud seeding project.
Cloud Seeding Project; ?Target and Control Stations; Historical Regression Method; Yazd Province
Zoljoodi, M. and Didevarasl, A. (2013) Evaluation of cloud seeding project in Yazd Province of Iran using historical regression method (case study: Yazd 1 cloud seeding project, 1999). Natural Science, 5, 1006-1011. doi: 10.4236/ns.2013.59124.
[1] Bruintjes, R.T. (1999) A review of cloud seeding experiments to enhance precipitation and some new prospects. Bulletin of the American Meteorological Society, 80, 805820. doi:10.1175/1520-0477(1999)080<0805:AROCSE>2.0.CO;2 [2] Kloskove, B.P. (2010) Statistical evaluation of results of operative precipitation enhancement activities over large areas using historical regression method. Russian Meteorology and Hydrology, 35, 265-271. doi:10.3103/S1068373910040047 [3] Weather Modification Advisory Board (1978) The management of weather resources. Report to the Secretary of Commerce, 2 Volumes. [4] National Academy of Science (1966) Weather and climate modification, problems and prospects. Vol. I. NASA/ NRC Publ.1350, Washington DC, 39 p. [5] National Academy of Science (1966) Weather and climate modification, problems and prospects. Vol. 2. NASA/ NRC Publ. 1350, Washington DC, 210 p. [6] (1973) Weather and climate modification, problems and prospects. NASA/NRC, Washington DC, 258 p. [7] American Meteorological Society (1992) Planned and inadvertent weather modification. Bulletin of the American Meteorological Society, 73, 331-337. [8] Smith, E.J., Adderly, E.E. and Walsh, D.T. (1963) Cloudseeding experiment in the snowy mountains, Australia. Journal of Applied Meteorology, 2, 324-332.
doi:10.1175/1520-0450(1963)002<0324:ACSEIT>2.0.CO;2 [9] Shaw, D.E. and King, W.D. (1986) Feasibility study to assess the potential of a cloud seeding experiment over the catchment of the Snowy Mountains Scheme. SIROMATH Pty Ltd., Report. [10] Warburton, W.J.A. and Wetzel, M.A. (1992) Field study of the potential for winter precipitation enhancement in the Australian Snowy Mountains. Atmospheric Research, 28, 327-363.
doi:10.1016/0169-8095(92)90016-4 [11] Snowy Mountains Hydro Electric Authority (SMHEA) (1993) Snowy precipitation enhancement project. Draft Environmental Impact Statement. [12] Changnon, S.A. and Lambright, W.H. (1990) Experimentation involving controversial scientific and technological issues: Weather modification as a case illustration. Bulletin of the American Meteorological Society, 71, 334-344.
doi:10.1175/1520-0477(1990)071<0334:EICSAT>2.0.CO;2 [13] Rosenfeld, D. and Nirel, R. (1996) Seeding effectiveness—The interaction of the desert dust and the southern margins of rain cloud systems in Israel. Journal of Applied Meteorology, 35, 1502-1510. doi:10.1175/1520-0450(1996)035<1502:SEIODD>2.0.CO;2 [14] Nirel, R. and Rosenfeld, D. (1995) Estimation of the effect of operational seeding on rain amounts in Israel. Journal of Applied Meteorology, 34, 2220-2229.
doi:10.1175/1520-0450(1995)034<2220:EOTEOO>2.0.CO;2 [15] Iran National Research Centre of Cloud Seeding Studies (2010) Enhancement of water extraction over Gavekhoni watershed through cloud seeding operation. [16] Khalili Sr., M., Seidhassani, M., Golkar, F. and Khatibi, V. (2009) Results of cloud seeding operations for precipitation enhancement in Iran during 1999-2007. National Cloud Seeding Research Center, Yazd. [17] Neyman, J. (1967) Experimentation with weather control. Journals of the Royal Statistical Society, Series A, 130, 285-326.