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:: Volume 29, Issue 3 (2014) ::
geores 2014, 29(3): 147-163 Back to browse issues page
Studying Temporal-Spatial Changes of Frost in Zayanderoud Basin
Kamal Omidvar *1, Aghdas Aslani2
1- Yazd University, Iran , komidvar@yazd.ac.ir
2- Yazd University, Iran
Abstract:   (1142 Views)
Zayanderoud Basin is one of the important agricultural areas in country level because of climatic variety and resuscitative water of Zayanderoud River. Since frost phenomenon especially late spring frost incurs great damages on fruit trees and agricultural products of this region، it is necfessary to study frost in this basin.In this research، the intensity of frost during cold period and spring season in Zayanderoud Basin in five thresholds: mild (0 to -5 0C)، moderate (-1.5 to -10 0C)، strong (-1.10 to -150C)، very strong (-1.15 to -20 0C) and extraordinarily strong (lower than -200C) was studied using daily minimum temperature statistics of 13 meteorological stations during 16-years statistical period (1992-1993 to 2007-2008). Frequency zoning map of different frost intensities was also drawn in ARC MAP environment. The results of research show that all studied stations of Zayanderoud Basin experience mild to very strong frost during cold period، but the extraordinarily strong frost only is occurred within elevated regions (above 2000 m). In spring season، mild frost is occurred in until late Farvardin month and within elevated stations until third decade of Ordibehesht and moderate frost is only occurred within 2000 m stations and above in Farvardin month. Strong frost is only occurred in the studied north-western region. According to zoning maps، north-western Zayanderoud Basin is hazardous in terms of the frequency of occurrence of different frost intensities.
Keywords: Temporal, Spatial Changes, Frost, Zayanderoud Basin, Minimum Temperature, Zoning
Full-Text [PDF 533 kb]   (462 Downloads)    
Article Type: Original Research | Subject: Special
Received: 2018/02/25 | Accepted: 2018/02/25 | Published: 2018/02/25
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Omidvar K, Aslani A. Studying Temporal-Spatial Changes of Frost in Zayanderoud Basin. geores. 2014; 29 (3) :147-163
URL: http://georesearch.ir/article-1-352-en.html


Volume 29, Issue 3 (2014) Back to browse issues page
فصلنامه تحقیقات جغرافیایی Geographical Researches Quarterly Journal
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