نتایج جستجو برای: sistan river

تعداد نتایج: 84609  

Journal: :نشریه علمی - پژوهشی هیدرولوژی کاربردی 0
omolbani mohammadrezapour mohammad javadzeynali

by far, different models for determining the relationship between the flow rate  and amount of precipitation have been developed. many models are based on regression models with limited assumptions. one of the most common methods for estimating  sediment of rivers is sediment rating curve. for better estimation of the amount of sediment based of sediment curve  rating equation, it is possible t...

Journal: :iranian journal of ichthyology 0
arash jouladeh-roudbar department fisheries, sari university of agriculture sciences and natural resources, mazandran, iran. soheil eagderi department of fisheries, faculty of natural resources, university of tehran, karaj, iran. saber vatandoust department of fisheries, babol branch, islamic azad university, babol, iran.

paraschistura alta , formerly reported from the eastern part of sistan basin in afghanistan, is reported for the first time from the zahak river in iranian part of this basin and its morphological characteristics, coi barcode and its phylogenetic relationship within other members of the genus paraschistura from iran are provided. all the measured meristic and morphometric characters of seven co...

Journal: :international journal of aquatic biology 0
hamed mousavi-sabet department of fisheries sciences, faculty of natural resources, university of guilan, someh sara, guilan, iran. keyvan abbasi inland water aquaculture research center, iranian fisheries research organization, guilan, iran. saber vatandoust department of fisheries, babol branch, islamic azad university, mazandaran, iran. soheil eagderi department of fisheries, faculty of natural resources, university of tehran, karaj, alborz province, iran.

paracobitis vignai is a nemacheilid loach endemic to the sistan basin. it occurs in helmand river and its related reservoirs in sistan-va-baluchistan province in southeastern iran and probably in afghanistan. this species is currently endangered due to habitat loss or degradation, damming and droughts. therefore, this paper reviews the available data on taxonomy and distribution of p. vignai , ...

Journal: :E3S web of conferences 2022

In recent years, river flow into Sistan dam changed because of construction dams and expansion irrigation areas in the upper Helmand basin. Planning for more heightening Kajaki basin shall intensify severity water shortage Hamun Lake. located at downstream on branch river, power shifts Afghanistan upstream basins absence an integrated authority/management are major problems. Political nature in...

Journal: :نشریه مهندسی عمران و نقشه برداری 0
احمد طاهرشمسی دانشگاه صنعتی امیرکبیر فرهاد ایمان شعار دانشگاه صنعتی امیرکبیر

in this paper, river regime equations through developing of unit stream power equation and based on data of sistan and karaj rivers were derived. at the first step, methods and out-comes of former researchers are classified. on the next step, based on dimensional analysis, unit stream power as a function of river flow parameters including suspended sediment load and specific gravity of particle...

Journal: :iranian journal of ichthyology 0
brian w. coad research scientist, ichthyology section, canadian museum of nature, ottawa, canada.

the land-locked country of afghanistan has a restricted but relatively diverse ichthyofauna comprising 85 species in 10 families. the fauna is dominated by cyprinidae (50 species) and other ostariophysans (28 species). eight species are endemics to afghanistan within its political boundaries. there are three principal drainage basins: the endorheic amu darya draining to the aral sea with 29 spe...

Journal: :مطالعات باستان شناسی 0
حمید حسنعلی پور حمید حسنعلی پور دانشجوی دکتری رشتة باستان شناسی دانشگاه تهران حسن کریمیان حسن کریمیان دانشیار گروه باستان شناسی دانشگاه تهران سیدرسول موسوی حاجی سیدرسول موسوی حاجی دانشیار گروه باستان شناسی دانشگاه مازندران

the climatic conditions of sistan plain and its coexistence paved the way for settlement of human populations, establishment of various residential sites and perhaps more importantly, emergence of civilizations that have given rise to the great cities such as shahri-sukhteh and tang-e gholaman.   although the accumulation of residential areas in the plain during different times and their proxim...

ژورنال: علوم آب و خاک 2020

This study aimed to investigate the vulnerability of Sistan plain to fluctuations and Water Scarcity in Hirmand River using the vulnerability framework, by applying the resilience approach. The socioeconomic and biophysical components presented in this framework were embedded in a set of subsystems of the System Dynamics (SD) model. According to this, four levels of reference resilience were de...

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