Quantitative and Size Analysis of Dust Fall on Mosul City and Suburbs and Comparison with previous years.

A. Al-Kawaz, Hazim

	Quantitative and Size Analysis of Dust Fall on Mosul City and Suburbs and Comparison with previous years.
Tikrit Journal of Pure Science
Article 1, Volume 16, Issue 3, 2011, Pages 236-243
Author
Hazim A. Al-Kawaz
Abstract
The results of monthly , seasonally and annuallyquantitative analysis of average dust fall on Mosul city and suburbs have revealed that through one year beginning from (1/10/2008 to 30/9/2009) showed that unpresented increase in the average dust fall out with ratio of (330%) compared with the last ten years. In the average annual is (45.2) gr/m2/month while not exceeding ratio (13.6) gr/m2/month in year1998,. The above ratio exceeded the level of five times the allowable international ratio which is (9.0) gr/m2/month . The results also revealed that there is a positive relationship between the average yearly dust fall out with time. This amount on Mosul City through the year 1998 is (13.6) gr/m2/month, in the year 2006 is (31.65) gr/m2/month, while the present study have showed that the average dust fall was (45.2) gr/m2/month. Size analysis of dust fall indicated that through the four season there is no variation in the grain size component (clay, silt and sand)%, there is no remarkable variance in the average dust fall on the two sides of Mosul City , This indicates that the source area is regional as well as locally , that conclusion is promoted by daily and monthly looking at website as well as the results of the Ministry of environment for a year 2006 for distribution and dispersion of the dusts in Iraq governments.

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