نتایج جستجو برای: zayandeh rud river

تعداد نتایج: 83753  

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In order to investigate phenotypic abnormality in Khorram-rud River in Lorestan province in Iran, 1982 specimens including 13 species were caught. For this purpose, 8 sites were chosen on Khorram-rud River in Khorramabad city from 10 Km upstream to 10 km downstream of the city. Fish were caught using a cast net. Most of the sampled fish were returned to the river if there were no phenotypic abn...

ژورنال: علوم آب و خاک 2019

In the present study, we used 27 precipitation average monthly data from synoptic, climatologic, rain-guage and evaporative stations located in Zayandeh-Rud river basin for the period of 1970-2014. Before interpolating, the missing data in the time series of each station was reconstructed by the normal ratio method. Also, for the data quality control, the Dickey-Fuller and Shapiro-Wilk tests we...

Journal: : 2021

Developing a Model for the Integrated Management of Water and Soil Resources in Hableh-Rud River Basin Using System Dynamics Approach

Journal: :تحقیقات نظام سلامت 0
احمدرضا رهسپار دانشجوی کارشناسی ارشد بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان و شبکه بهداشت داراب، شیراز، ایران. مهدی حاجیان نژاد دانشیار مهندسی بهداشت محیط، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران محمد مهدی امین دانشیار مهندسی بهداشت محیط، مرکز تحقیقات محیط زیست، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران. اکبر حسن زاده مربی، گروه آمار و اپیدمیولوژی، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران.

background: zayandeh-rood river is the only perennial river in the central basin of iran that has fresh water. water from this source is used for drinking, industrial and agricultural purposes. drinking water is extracted from upstream portion (upstream of chamaseman dam) of zayandeh-rood river and therefore its quality is very important. due to growth of population, industry and other factors,...

Journal: :journal of agricultural science and technology 2010
s. m. hosseini b. zahraie

this study is focused on developing an integrated optimization-simulation based genetic algorithm model (iosga) to develop the operational policies for a multi-purpose reservoir system. the objective function of the optimization model is considered to be a linear function of reliability (rel), resiliency (res), and vulnerability (vul) of the river-reservoir system. genetic algorithm (ga) is emp...

Journal: :caspian journal of environmental sciences 2014
m. pourafrasyabi z. ramezanpour

phytoplanktons are the first bio- indicators of pollution in aquatic ecosystems. phytoplankton assemblage and aquatic ecosystems are always influenced by environmental factors therefore these environmental changes and threats must be understood in any ecosystem. phytoplankton are inexpensive and readily available bio- indicators. in the present study, phytoplankton were used to study the sefid ...

Journal: :journal of arthropod-borne diseases 0
mansoreh shayeghi department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran. hassan vatandoost department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran. abdollah gorouhi department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran. ali reza sanei-dehkordi department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran. yaser salim-abadi department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran. mohsen karami department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran.

b a ckground: aquatic insects are the  major groups of arthropods that spend  some parts of their life cycle in the water. these insects play an important role for transmission of some human and animal diseases. there is few information about the aquatic insects fauna of iran. m e t hods: to study the aquatic insects fauna, adult, nymphal and larval collections were carried out from different h...

Journal: :اقتصاد و توسعه کشاورزی 0
علیرضا نیکوئی منصور زیبایی

irrigated agriculture is an important contributor to the expansion of national food supplies and is expected to play a major role in food security of developing countries. such countries face water crisis for securing the food staples. well designed water resource policies potentially can improve the water allocation and use efficiency as well as the food security objectives. this paper present...

Journal: :محیط شناسی 0
رضوان حاتمی دانشگاه صنعتی اصفهان ، کارشناس ارشد شیلات نصراله محبوبی صوفیانی دانشگاه صنعتی اصفهان ، گروه شیلات ، دانشیار دانشکده منابع طبیعی عیسی ابراهیمی دانشگاه صنعتی اصفهان گروه شیلات، استادیار دانشکده منابع طبیعی محمودرضا همامی دانشگاه صنعتی اصفهان ، گروه محیط زیست ، استادیار دانشکده منابع طبیعی

we investigated the environmental impact of trout farm discharge on zayandeh-rud river. three farms with different production capacities; 250, 25 and 70 tones were assigned to this study. five sampling sites were designated to each farm. benthic macroinvertebrates were collected in autumn, winter, and spring using the quantitative techniques. a total of 11 classes, 16 orders and 53 families&apo...

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