Identification and Seasonal Distribution of Ambient Bioaerosols and Associated Meteorological Factors in Shahrekord, Iran (original) (raw)

The study of factors affecting the vegetation in aquatic and wet habitats of Boujagh National Park, Kiashahr, Guilan Province, Iran

Nova Biologica Reperta, 2015

Boujagh National Park, with water ecosystems including Boujagh and Kiashahr wetlands, has an area of approximately 3477.3 hectares. In order to study factors affecting the vegetation in aquatic and wet habitats, 44 releves were implemented in the region. To test the chemical properties of the available water, samples were collected from 22 releves. The results of a two-way species indicator analysis of the modified TWINSPAN suggested that four groups of plants were present in the region. The first group being floating, immersed and submerged and the third and fourth groups being mostly helophytic. The second group of plants grows in areas with sand and mud. The results of comparative DCA analysis of water factors (PH, Depth, P, N, Cl, CO 3 , Hco 3 , EC, Na, K) showed a significant correlation between the factors and plant groups and the most important factors influencing the distribution and separation of plants was found to be water depth. In addition, Boujagh and Kiashahr wetlands vegetation map, based on the plant groups, was also prepared.

‫ﻋﻠﻤﻲ‬ ‫ﻓﺼﻠﻨﺎﻣﻪ‬-‫اﻳﺮان‬ ‫ﺑﻴﺎﺑﺎن‬ ‫و‬ ‫ﻣﺮﺗﻊ‬ ‫ﺗﺤﻘﻴﻘﺎت‬ ‫ﭘﮋوﻫﺸﻲ‬ ‫دﻳﺠﻴﺘﺎل‬ ‫ﺷﻨﺎﺳﻪ‬ Investigation of some environmental and vegetative characteristics of three endemic rangeland species in East Azarbaijan province, Iran

‫ﺟﻠﺪ‬ 24 ‫ﺷﻤﺎره‬ ، 2 ‫ﺻﻔﺤﻪ‬ ، 403-392) 1396 (‫وﻳﮋﮔﻲ‬ ‫از‬ ‫ﺑﺮﺧﻲ‬ ‫ﺑﺮرﺳﻲ‬ ‫در‬ ‫اﻧﺪﻣﻴﻚ‬ ‫ﻣﺮﺗﻌﻲ‬ ‫ﮔﻮﻧﻪ‬ ‫ﺳﻪ‬ ‫روﻳﺸﻲ‬ ‫و‬ ‫ﻣﺤﻴﻄﻲ‬ ‫ﻫﺎي‬ ‫آذرﺑﺎﻳﺠﺎن‬ ‫اﺳﺘﺎن‬ ‫ﺷﺮﻗﻲ‬ ‫ﻃﻴﺐ‬ ‫ﻧﺎزﻳﻼ‬ ‫ﻧﮋاد‬ 1 ‫ﻋﺼﺮي‬ ‫ﻳﻮﻧﺲ‬ ، 2 * ‫ﭘﺎﻛﺮوان‬ ‫ﻣﻨﻴﮋه‬ ، 3 ‫ﻧﺠﻴﺐ‬ ‫ﻣﺤﻤﺪرﺿﺎ‬ ‫و‬ ‫زاده‬ 4 ‫ﺟﻠﺪ‬ ‫اﻳﺮان‬ ‫ﺑﻴﺎﺑﺎن‬ ‫و‬ ‫ﻣﺮﺗﻊ‬ ‫ﺗﺤﻘﻴﻘﺎت‬ ‫ﻓﺼﻠﻨﺎﻣﻪ‬ 24 ‫ﺷﻤﺎره‬ 2 393 ‫ﺟﻠﺪ‬ ‫اﻳﺮان‬ ‫ﺑﻴﺎﺑﺎن‬ ‫و‬ ‫ﻣﺮﺗﻊ‬ ‫ﺗﺤﻘﻴﻘﺎت‬ ‫ﻓﺼﻠﻨﺎﻣﻪ‬ 24 ‫ﺷﻤﺎره‬ 2 403 Abstract Acantholimon gilliatii, Astragalus aharicus and A. neo-mobayenii are the endemic species with one population in East Azarbaijan. Previous observations of researchers have shown that survival of these species at risk and their distribution is being limited. In this study, topographic, climatic and soil characteristics were investigated in habitats of these species. Also, coverage, height density and phenology of the study species were determined by using 10 plots in each area with random method during 2013 and 2014. The habitat of A. gilliatii is very limited in the southern slopes of ...

تعیین ضرایب معادله آنگستروم و توسعه یک معادله رگرسیونی برآورد تابش خورشیدی (مطالعه موردی:منطقه مشهد)

2009

Solar radiation, nowadays has a lot of application in different fields of agriculture, irrigation, and hydrology engineering and due to these various applications, different models has been proposed for it’s estimation. Angstrom-Prescott equation is one of the most important well known models for solar radiation estimation. This equation has empirically coefficient that various for each location. In this paper, the data gathered in Mashhad Synoptic station during 1378 and 1380, Angstrom-Prescott coefficient has been identified according to the ratio of actual sunshine hours (n) to the maximum sunshine hours (N). Also a Regression local equation has been proposed considering several meteorology parameters including daily gathered data of saturation vapor pressure deficit, precipitation, air temperature mean, relative humidity percentage and n/N. Finally the proposed model has been evaluated according to the independent measured data during 1381 to 1382. The statistical analysis of th...

Environmental Assessment of Styrene as a Dangerous Substance Entering the Container Terminal Using the ALOHA and PHAST Softwares (Case Study: Bandar Imam Khomeini)

Journal of Health, 2019

Background & objectives: Modeling with software is a fast way to predict the extent of material release range and simulate its consequences. Due the arrival of the large number of dangerous goods, including styrene, from the petrochemical industries to the port of Imam Khomeini, it is necessary to evaluate the consequences and potential damages of this material.This study was conducted in 2014 in Imam Khomeini Port Container Terminal with the aim of predicting and estimating the possible human and environmental consequences of the release of this hazardous material during transportation process. Methods: In this study, with the use of PHAST and ALOHA softwares, the effect of toxicity of styrene was studied as a dangerous good entered into the container terminal. The analysis was performed by identifying the range of areas with highest adverse effects. Results: According to the results, the extent of pollution coverage (the forbidden region) was at least in a radius of 67 meters and the best place for placement of support groups was in a radius of 329 meters of dangerous goods area. The study also showed that based on the coverage of the risk range in these modeling, ALOHA software had a high environmental sensitivity, because the amount of LOCs considered in the consequence of the explosion was lower and it considered more danger zones. Finally, management measures were pointed to prevent or reduce the potential consequences of hazardous goods storage sites and warehouses in the study area. Conclusion: The environmental outcomes of dangerous goods containers in Imam Khomeini port are likely to be probable. So that the release consequences of these materials can cause a lot of environmental damage and accidents. Therefore, it can be said that modeling using software in this study played a key role in managing the area of hazardous materials containers.

Evaluating Roles of Drought and Climatic Factors on Variability of Four Dry Farming Yields in Mashhad and Birjand

2013

Prediction of crop yield is one of the managerial and planning tools in agriculture. Meteorological variables and drought indices play an essential role in yield prediction. In this study, the yield of four crops, namely wheat, barley, chickpea and watermelon was predicted in Mashhad and Birjand regions based on meteorologica l variables and drought indices using three regression models of Ridge, Enter and Step Wise. For this purpose, ten meteorological parameters and seven drought indices were used in three structures as input multivariate regression models. Results showed that among the meteorological variables, the two variables: number of rainy days and maximum air temperature had higher correlation with crops under study. Similarly, among drought indices, Nguyen index showed such higher correlation. It was found that Ridge multivariate model including weather parameters and meteorological drought indices could be recommended instead of two structures of meteorologica l variable...

Horizontal array study and plant cover zonation of Choghakhor wetland (W Iran)

2011

For studying vegetation cover in Choghakhor wetland located in Chaharmahal-o-Bakhtiari province (W Iran), some zones of vegetation life forms were determined and also digitized in order to produce the primary map of plant cover by using LISS-IV sensor of IRS satellite with the spatial resolution of 5.8 m. As aquatic plants in Choghakhor wetland were fully grown, homogeneity or heterogeneity of vegetation units and their zones were measured based on quantitative characteristics of plants communities. Vegetation sites were evaluated from shore to water body by linear transects and sampled quantitative characteristics in 1 × 1 m quadrates at 10 and 20 m intervals. Frequency Presence Diagram was used in order to recognizing of zoning and horizontal array of wetland plants. Summing of species array based on water depth and dominated planttypes were shown that wetland vegetation cover is distinguished to two main zones and one transitional zone.