Ali Ramezani; Mehdi Ahmadimoghadam; Amir Hessam Hassani; Mohamad Reaz Jafari
Abstract
From the past, the rivers were the agent of engender of municipal, industrial and agricultural centers beside the rivers. By increasing the population, growing the technology, increasing the use of water resources and abnormal occupation, the quality condition of rivers are changed. In this respect, ...
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From the past, the rivers were the agent of engender of municipal, industrial and agricultural centers beside the rivers. By increasing the population, growing the technology, increasing the use of water resources and abnormal occupation, the quality condition of rivers are changed. In this respect, the analysis of the qualitative data and the investigation of local information could help us in affecting the quality of rivers for zonation and management control to the accepted level of standard for various usages. Godarkhosh, one of the country's border rivers in Iran-Iraq border, is located in Ilam Province, with its basin of about 1202.68 km2. The research area is Godarkhosh river basin which starts from its entrance to the province to its outlet to Iraq. Required parameters such as monthly Biological Oxygen Demand, Total Phosphate, Nitrate, Focal Coliform, Total Suspended Solids, Dissolved Oxygen, Turbidity, pH, and Temperature were measured in 10 sampling stations of Sheshdar, Tanghamam, Tasfiehkhaneh, MehdiAbad, Banvizeh, Chamab, Gardaneh Ghala, Ghebleh, Pole Felezi, and Pole Shekasteh, from autumn to winter 2010. Several studies have been performed regarding surface water quality mainly investigating the effect of unnatural water pollutants. In this research, the reciprocal effects of natural and unnatural factors on river water quality were investigated. Compilation of laboratory results with quality index information layers within the GIS environment demonstrated that Mehdi Abad sampling station with 47.33 NSFWQI quality index is in a bad and the rest of the sampling stations with 50 to 70 NSFWQI quality index are in the average situation.
Maryam Pournader; Hassan Ahmadi; Jamal Ghoddosi; Mohammad Reza Jafari
Abstract
According to abundant damages and the extension of mass sliding in the country, its zonation mapping and investigating effective factors on its occurrence is necessary for preventing and control. Therefore, a research has been conducted in the Ilam dam watershed to create geologic, physiographic, Land ...
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According to abundant damages and the extension of mass sliding in the country, its zonation mapping and investigating effective factors on its occurrence is necessary for preventing and control. Therefore, a research has been conducted in the Ilam dam watershed to create geologic, physiographic, Land use, vegetation cover, soil erosion, climatologic, pedologic and geomorphologic maps, using earth data layers, topographic maps, Geographic Information Systems (GIS) and field surveys. The methodology of this research has been accomplished base on distinction of geomorphologic units while using aerial photos and crossing basis maps. Then, the effective factors on mass movement occurrence were investigated using logistic regression equations. So that, the factors such as slope, geological formation, pedologic, climatic, etc. were considered as independent variables and the frequency of mass movement occurrence was considered as dependent variable. Results demonstrated that factors such as slope, geological formation, the kind and the amount of soil minerals, and land use are the most effective factors on frequency of land sliding in the watershed.
