Iranian Journal of Range and Desert Research

Trend analysis of annual, seasonal and monthly groundwater level (Case study: sub-basin of Arak Mighan)

Tahereh Ensafi moghaddam

Volume 27, Issue 3 , October 2020, , Pages 516-544

Abstract

In the present study, the Miqan sub-basin of the Arak region was quantitatively investigated to find out the temporal and spatial variations of groundwater level in the nine Qanats (subterranean canals). The methodology to evaluate the spatial and temporal changes of groundwater level, the ... Read More

Determination of climatological deserts in Iran

Mohammad Khosroshahi; Mohammad taghi khashki; Tahereh Ensafi Moghaddam

Volume 16, Issue 1 , December 2009, , Pages 96-113

Abstract

Many climatology scientist adopted temperature and precipitation among all climatic parameters to identify desert regions from non-desert areas. There is no one definition of a desert that is accepted by all. The boundaries of a desert change radically depend on the variance in the range of proposed ... Read More

Climatic Droughts Zoning using Inverse Distance Weighted Method

Tahereh Ensafi Moghadam; Amar Rafiei Emam

Volume 16, Issue 2 , December 2009, , Pages 274-292

Abstract

The present study firstly sets out the procedure for the generation of climatic files for localities with climatic records and secondly, The process of obtaining maps of the climatic zones for all of the localities in the Salt Lake Basin of Iran. For the generation of the climatic records such as rainfall ... Read More

An Investigation and assessment of climatological indices and determination of suitable index for climatological droughts in the Salt Lake Basin of Iran

Tahereh Ensafimoghadam

Volume 14, Issue 2 , January 2007, , Pages 271-288

Abstract

Of the many Climatic events that influence earth’s environmental fabric‚ drought is perhaps the one that is most linked with desertification(WMO‚1997).This Investigation is an effort for assessment of acceptability about many of Climatic current Drought Indices in reagent and ... Read More Of the many Climatic events that influence earth’s environmental fabric‚ drought is perhaps the one that is most linked with desertification(WMO‚1997).This Investigation is an effort for assessment of acceptability about many of Climatic current Drought Indices in reagent and sample stations of Salt Lake Basin of Iran. These drought indices which are used in world active systems, are Percent of normal precipitation Index PNI, Deciles of precipitation Index DPI, Standardized precipitation Index SPI, and Z Score Index ZSI.The above mentioned indices were calculated first by average of monthly precipitation data for a 44 years period from 1957 to 2000 relate to 34 synoptic and climatological stations in their common time scales. Based on obtained results from one hypotheses, DPI and SPI indices in the contemporary with minimum occurrence, showed, extremely drought in the studied stations. These acceptability of indices in more than of other indices and according of this investigation,DPI index sit on the first place, SPI sit on the second place, ZSI index sit on the third place, and finally PNI Index, sit on the forth place. In next stage the Standardized Precipitation Index SPI, based on precipitation values from 34 monitoring stations around the Salt Lake Basin of Iran, is computed monthly and was performanced for climatic interpret and characteristic include assess drought relative frequency, intensity, expand and duration and calculated return period of the most intense drought and according to the point stations data, drew intense map. This investigation indicate the most intense drought in Salt Lake Basin of Iran belong to Hamadan(Nozheh) and the longest drought duration in Avaj ‚Dooshantappeh‚ and Kashan Stations with the highest relative frequency digit of drought (38/6%) and the lowest relative frequency digit of drought (18/1%) belong to Golpayegan. The most of severe year has occurred in 1973 and 1967 in 44 years period.

Iranian Journal of Range and Desert Research

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Volume 11 ()

Author = طاهره انصافی مقدم

Trend analysis of annual, seasonal and monthly groundwater level (Case study: sub-basin of Arak Mighan)

Abstract

Determination of climatological deserts in Iran

Abstract

Climatic Droughts Zoning using Inverse Distance Weighted Method

Abstract

An Investigation and assessment of climatological indices and determination of suitable index for climatological droughts in the Salt Lake Basin of Iran

Abstract