Analysis of the role of internal dust sources in creating critical conditions in Ahvaz with an emphasis on the southeastern area

Document Type : Research Paper

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Abstract

Khuzestan is the largest source of internal dust in the country. Ahvaz dust is not a new phenomenon, and what made it to a major environmental problem, is the increase in occurrence of critical conditions due to internal sources of dust. In order to identify the role of the internal recoil center on the creation of critical conditions, daily data on wind direction and wind speed and the minimum horizontal visibility of Ahwaz synoptic station during the 1987-2016 statistical period were extracted, and for the identification of spatial and temporal distribution of the relative contribution of wind speed and wind direction, long-term annual and seasonal wind rose and Golghobar was drawn from the eight primary and secondary directions.. To identify the role of internal and external dust sources, events associated with internal origins, i.e. the sources around the station (Code 07) and outside of the station (Code 06) were maped and their seasonal Golghobar were drawn. Dust events with internal origin overlaid on the layer of internal dust sources and flowing sands. The results showed that the dominant wind direction is west and then North West and general Golghobar follows it. Seasonal Golghobar with external sources comply with general Golghobar but Golghobars with domestic resources change which prevails to South and South East direction in the cold season. Monthly and annual distribution of critical views of the South and South-East were extracted and the results revealed their higher frequency in the cold season. SPI drought index was calculated for the cold season and its relationship with critical views showed demonstrated that their occurrence follows the winter drought. Suitable protective measures should be taken in different parts of the recoil centers, marshes, drylands, grasslands, poor rangelands, etc.
 
 

Keywords

References

- Abbasi, H., Sozangard, F., Roupipour, H. and Seyed Akhlaghi, S.J. 2011. Surveying distribution, morphology and activity of sand dunes in Khuzestan province. The first international congress on dusty phenomena, 28-26 February, Faculty of Agriculture and Natural Resources, Ramin, Ahvaz, Khuzestan (In Persian).
- Akbari, M. and Farahbakhshi, M. 2015. Synoptic Analysis and Simulation of High Dust in Southwest Iran. Journal of Geographic Space, 16(55): 91-273 (In Persian).
- Alharbi, B.H., Maghrabi, A. and Tapper, N. 2013. The March 2009 dust event in Saudi Arabia: Precursor and supportive environment. Bulletin of the American Meteorological Society, 94(4): 515-528.
- Ali Abadi, K., Asadi Zanganeh, M. and Dadashi Roodbari, A. 2015. Evaluation and monitoring of dust storms using remote sensing methods. Journal of Rescue, 7(41): 1-20 (In Persian).
- Azizi, A., Shamsipour, A., Miri, M. and Safar Rad, T. 2012, Statistical analysis - Synoptic phenomenon of dust in the western half of Iran. Journal of Environmental Studies, 38(63): 123-134 (In Persian).
- Bertaina, H. 2012. Feasibility of using satellite imagery to estimate dust concentration and measuring lead and zinc concentrations. Master's thesis, Ministry of Science, Research and Technology, Shahid Chamran University of Ahvaz, Faculty of Agriculture and Natural Resources.
- Bohiraee, H., Ayazi, M. and Rajaei, M. 2011. Synoptic Statistical Analysis of Dust in Ilam Province. Journal of New Attitudes in Human Geography, 4(1): 29-47 (In Persian).
- Geological Survey of Iran, 2015. Identification Design of Source dust in Khuzestan Province (In Persian).
- Ghafari, D. and Mostafa Zadeh, R. 2015. Study of the origin, effects and solutions of dust phenomena in Iran. Journal of Conservation and Exploitation of Natural Resources, 4(2):107-125 (In Persian).
- Guan, Q., Sun, X., Yang, J., Pan, B., Zhao, S. and Wang, L. 2017. Dust Storms in Northern China: Long-Term Spatiotemporal Characteristics and Climate Controls. Journal of Climate, 30(17): 6683-6700.
- Fallah, M.Z., Vafayinezhad, A.R., Khairkhash Zarkesh, M.M. and Ahmadi Dekaa, F. 2014. Synoptic monitoring and analysis of dust phenomena using remote sensing and GIS. Case study: Dust June 18, 2012 GIS, 23(91): 69-80 (In Persian).
- Farhbakhsh, M., Alijani, B. and Fattahi, A. 1394. Synoptic Analysis of Dust Risk from 10 to 12 August 2013 in Iran. Journal of Risk Knowledge, 2(1): 5-20 (In Persian).
- Jin, Q., Yang, Z.L. and Wei, J. 2016. Seasonal Responses of Indian Summer Monsoon to Dust Aerosols in the Middle East, India, and China. Journal of Climate, 29(17): 6329-6349.
- Mallia, D.V., Kochanski, A., Wu, D., Pennell, C., Oswald, W. and Lin, J.C. 2017. Wind-Blown Dust Modeling Using a Backward-Lagrangian Particle Dispersion Model. Journal of Applied Meteorology and Climatology, 56(10): 2845-2867.
- Naserpour, S., Alijani, B. and Ziaian, P. 2015. The origin of dust storms using satellite imagery and air maps. Journal of Natural Geography Research, 37(1): 21-36 (In Persian).
- Ranjbar, A and Azizi, Gh. 2012. Study of Meteorological Patterns, Identification of Dust Source and Particulate Movement Paths for the July 2009 Storm. Natural Geographic Research, 44(3): 73-92 (In Persian).
- Ranjbar, A. and Darvishzadeh, P. 2013. Study of atmospheric patterns and determination of effective dust sources in very unhealthy conditions Tehran's air quality. Journal of Environmental research, 4(7): 147-160 (In Persian).
- Shamsipour, A. and Safarrud, T. 2012. Satellite Analysis- Synthesis of the phenomenon of dust. Natural Geography Research, 79: 111-126 (In Persian).
- Stein, A.F., Draxler, R.R., Rolph, G.D., Stunder, B.J., Cohen, M.D. and Ngan, F. 2015. NOAA’s HYSPLIT atmospheric transport and dispersion
modeling system. Bulletin of the American Meteorological Society, 96(12): 2059-2077.
- Tavoosi, T., Kosravi, M. and Raeespoor, K. 2010. Synoptic Analysis of Dust Systems in Khuzestan Province. Journal of Geography and development, 8(20): 97-118 (In Persian).
- Yarahmadi, D., Nasiri, B., Khoshkish, A. and Nikbakht, H. 2014. The Effect of climate Fluctuations on the Event of Dust (Case Study: Dust in West and Southwest of Iran). Journal of Ecosystem of Desert, 3(5): 19-28 (In Persian).

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History

  • Receive Date: 07 June 2017
  • Revise Date: 16 March 2019
  • Accept Date: 09 April 2018

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