نتایج جستجو برای: local rivers chemical characteristics and discharges

تعداد نتایج: 17013414  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی و اجتماعی 1389

today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...

2014
Matthew Neave Heidi Luter Anna Padovan Simon Townsend Xavier Schobben Karen Gibb

Microbial source tracking is an area of research in which multiple approaches are used to identify the sources of elevated bacterial concentrations in recreational lakes and beaches. At our study location in Darwin, northern Australia, water quality in the harbor is generally good, however dry-season beach closures due to elevated Escherichia coli and enterococci counts are a cause for concern....

Journal: :international journal of advanced biological and biomedical research 2013
keivan khalili farshad ahmadi yagub dinpashoh ahmad fakheri fard

one of the most important hydrological time series task is to determine if there is any trend in the data and how to achieve stationarity when there is nonstationarity behavior in data. detecting trend and stationarity in hydrological time series may help us to understand the possible links between hydrological processes and global climate changes. in this study yearly, monthly and daily stream...

Journal: :journal of tethys 0

the morphological river evolution at long-time (centuries and even millennia) and large spatial scale (watersheds of several square kilometres) can be described by means of simplified 1d models, able to simulate the variation of bed elevation and grain size composition at non-detailed scales, involving a reduced computational effort. the erosion and deposition phenomena acting along rivers can ...

Landslides caused many ecological processes at landscape to local scales, including the ecological succession processes. The landslides geological characteristics and their management as physical risks are truly documented but the ecological processes that are caused by landslides and their relations to efforts to restore stability to unstable slopes, have not been well studied. In this study, ...

1997
Leal A. K. Mertes

The transfer of water, sediment, and other materials to floodplains is a function of the hydrology of inundation. Inundation of floodplains by regional water, that is, overbank flow from the main river channel, and local water, that is, groundwater, hyporheic water, local tributary water, and direct precipitation onto the floodplain, is such that some rivers inundate dry floodplains, while othe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1391

one of the most commonly used techniques to reduce the corrosion rate of rebar in concrete is addition substances named corrosion inhibitors into the concrete. corrosion inhibitor is chemical compounds that were added to concrete to prevent corrosion of steel in concrete. sodium nitrate is a type of anodic inhibitors that this study investigatesthe effect of this inhibitor on the properties of ...

Ahmad Fakheri Fard Farshad Ahmadi, Keivan KHalili Yagub Dinpashoh

One of the most important hydrological time series task is to determine if there is any trend in the data and how to achieve stationarity when there is nonstationarity behavior in data. Detecting trend and stationarity in hydrological time series may help us to understand the possible links between hydrological processes and global climate changes. In this study yearly, monthly and daily stream...

H. R. Payrovan Naser Shamskia

One of the most important subjects in relation of water resources quality in the many of river is the chemical composition of waters and conservation of water quality in the watershed. Geological formations in any region of the earth are the main surface and foundation that water flows on the bed and strata of formation, which in fact they affect their characteristics on water quality as positi...

Journal: : 2023

The study’s relevance consists in the need to determine prospects for achieving a good environmental condition of Ukrainian water bodies accordance with Water Framework Directive European Union on establishing framework Community's activities field policies. question ability achieve set goals is related assessment risks surface pollution by chemical substances. purpose research develop new appr...

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