List of Articles Jajroud

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  1 - Evaluation of the most efficient supervised classification algorithm in monitoring growth changes in Tehran
  Aida Ashjaee Seyed Masoud Monavari Jalil Imany Harsini Maryam Robati Zahra Azizi
  Background and Objectives: The urban sprawl is a dynamic and complex phenomenon, and the most effective factor is land use-cover change Coordinated by with the growth of population and economy, and the resulting changes affect vegetation and the functioning of urban eco More

  Background and Objectives: The urban sprawl is a dynamic and complex phenomenon, and the most effective factor is land use-cover change Coordinated by with the growth of population and economy, and the resulting changes affect vegetation and the functioning of urban ecosystems. In this paper, identification of the most appropriate classification algorithm to investigate the effect of urban sprawl growth in the east of Tehran city in the time period of 1986 to 2016 on land use-cover changes of Jajroud protected area has been studied. Material and Methodology: In this research, the land cover-use changes map was prepared using the supervised classification method and the comparison of three neural network algorithms, minimum distance and maximum likelihood was done in ENVI 5.3.1 software environment. Findings: Land use-cover changes from 1986 to 2016 (period of 30 years) shows the increase of land use-cover area including compact rangelands 58.45%, arid region 91/19%, urban 65/57%, and forest 74/47%. In 2016 compared to 1986. Discussion and Conclusion: By comparing and examining three supervised classification algorithms including neural network, minimum distance, maximum likelihood, the neural network method has been the most suitable algorithm to identify land use-cover changes. Manuscript profile
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  2 - Measurement of water quality potential of Jajroud river in Pardis city
  Alireza Niknam bejandi Farahnaz Karimzadeh Masoumeh Sohrabi Mullah Yousefi
  Jajroud River is located in Pardis city in the east of Tehran. The purpose of this study is to determine the amount of water pollution in this river For this purpose, 15 samples of water were collected in early July 1397. Water samples were then analyzed to determine th More

  Jajroud River is located in Pardis city in the east of Tehran. The purpose of this study is to determine the amount of water pollution in this river For this purpose, 15 samples of water were collected in early July 1397. Water samples were then analyzed to determine the concentrations of Fe, Cr, Cd, Zn, Pb, Cu, Co, Hg, As and Mn. The values ​​of cation and anion, TDS, pH, EC, COD, BOD, salinity, DO, NTU, gastrointestinal coliform and total coliform were measured in water samples. The reason for these measurements is to determine the quality of river water in terms of its physical and chemical variables. The average pH in surface water samples is 7.703, which indicates the alkaline nature of water samples. The high electrical conductivity of the Jajroud River is due to agricultural, horticultural and residential activities. High TDS indicates that the nitrate in the water is very high. Decreasing trend is the average concentration of the main cations in the water samples of Jajrud River as magnesium, potassium, sodium, calcium, and the order of the concentration of anions in surface water samples as chlorine, sulfate, phosphate, nitrate, bicarbonate. The result of ion distribution in the piper diagram indicates that the water type of anions is of sulfated type and is located in the chloride facies. And the type of water in sodium-potassium cations is in the magnesic facies. Manuscript profile
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  3 - Investigation of sedimentology, trend of changes in grain size and determination of Debi-sediment equation in Jajroud drainage basin
  فرج االله Fayazi نیما Nezamvafa KH Rezaei ندا Norouzi فائزه Borbori محمد Nakhaei
  Filling sediments behind dams decrease their useful lifetime, so sedimentological investigations in bedof arriving rivers are very necessary for distinguish and determination of sediment producer sources ofsediments. Latian dam and Jajroud river have a critical situatio More

  Filling sediments behind dams decrease their useful lifetime, so sedimentological investigations in bedof arriving rivers are very necessary for distinguish and determination of sediment producer sources ofsediments. Latian dam and Jajroud river have a critical situation. Jajroud drainage basin has an extentabout 710 km2. It is located in north east of Tehran. It has 7 sub basins include Fasham, Ahar,Meigoon, Lavarak, Emameh ,Kond and Afjeh. Its shape is nearly ellipsoid from NW to SE. Thisbraided river has gravely bed with single channel and dam parameter more than 1. Average slope ofJajroud river is 4 percent. This river flows on bicarbonate, silicate, calcium bicarbonate, sulfate andsalt material as bed rocks. The size of bed sediments has very irregular changes due to specializedtectonic activities in this area, arriving minor branches, clastic inputs, and changes in slope. So densityof drainage in this river is 1.6. Most of sedimentary bars in Jajroud river are longitude and they showshallow and claim conditions. Morphoscopy of grains doesn’t have any defined trend. Granulometricgraphs are polymodal. Sorting of grains are bad mostly. The graphs of mean and median changes havenot regular trend. Most of samples have negative skewness and they are platykortic. Branch coefficientof this basin is 3.081, so this basin is general basin. The hydrograph curve of flood is normal. Finalmodel for Debi- sediment for Jajroud basin has calculated based on physiography factors of basin thatis correlated in maximum of Debi and flooding sediments by power ministry of Iran. Manuscript profile
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  4 - A Comparative Analysis of Evolutions of Tectonical activities in Banks of Hable, Jajrood, and Haji Arab Rivers through Morphometric Methods
  zahrah sarbazi mohammadreza servati Mehran Maghsoodi Fateme Sabokkhiz
  The study of active tectonic is significant due to assessment of the risk of earthquake in different areas, especially those where relatively high tectonic activity was observed in Holocene and Pleistocene. The objective of present study is to compare the tectonic activ More

  The study of active tectonic is significant due to assessment of the risk of earthquake in different areas, especially those where relatively high tectonic activity was observed in Holocene and Pleistocene. The objective of present study is to compare the tectonic activity levels in banks of Hable, Jajrood, and Haji Arab rivers through morphometric analyses. The ratios determined in the present study include the proportion of valley floor width to its height, mountain front-side sinuosity, and longitudinal slope of river, drainage basin asymmetry, and ratio of drainage basin shape, ratio of inverse topographic symmetry of the basin, ratio of drainage basin symmetry, and symmetry ratio of the basin all of which represent the tectonic activity of a region in four categories of low, medium, high and very high. For active tectonic estimation, topographic maps (1: 250,000 and 1: 50,000) along with geological maps (1: 20,000 and 1: 25,000) along with 10m DEM of the studied regions were used. For generation of basins on the studied region, ArcGIS Software was used to deal with a database of digital elevation model. Certain phenomena such as fault scarp, multi-generational alluvial fans, and linear valleys are among morphologic evidence that are abundantly found in basins with high and medium tectonic activity. The results suggest that among the examined basins, the Jajrood basin is more influenced by tectonic activities and this is due to the influence of Jajrood Fault on this basin Manuscript profile
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  5 - Assessment of Factors Affecting on the Visitors' WTP and Evaluating Recreational Importance of Jajroud Area
  Bahram Sahabi Mohammadhadi Hajian Bakhtiar Javaheri
  The purpose of this paper is to estimate recreational value of Jajroud area and to determine factors affecting on the visitors willing to pay by using Contingent Valuation Method. To this end, a Double-Bounded Dichotomous Choice questionnaire is employed to collect the More

  The purpose of this paper is to estimate recreational value of Jajroud area and to determine factors affecting on the visitors willing to pay by using Contingent Valuation Method. To this end, a Double-Bounded Dichotomous Choice questionnaire is employed to collect the data required by the use of a simple random sampling. Then, the role and importance of individual, social and economical factors will be investigated as well as the willingness to pay of visitors by Logit model and Maximum Likelihood Estimation  method. Results indicate that more than 70 percent of respondents like to pay for recreational values of Jajroud area. In addition, the results of Logit model present that the variables of bid, age and size of families have significant negative effect on the individuals' WTP, while the variables of education, income, area attractiveness and individual concerns of environment have significant positive impact on WTP. Moreover, the optimum bid is about 5700 Rials and the annual recreational value of region is 4595 million Rials. Manuscript profile