نتایج جستجو برای: dam construction

تعداد نتایج: 220304  

In this study, using Modis images and wets pass model, the value of evapotranspiration for the northern Karun basin was estimated monthly from 2000 to 2014. The value of correlation coefficient for the obtained evaporations was R2 = 0.72. This model was calibrated and verified for different regions with different parameters. Data from 2000 to 2009 were used for calibration and data from 2010 to...

Journal: :E3S web of conferences 2022

In view of the problem insufficient storage capacity original landfill site, it is a very economical and effective way to use horizontal, longitudinal composite extension garbage dam with geotextile reinforced earth dam. this paper, types dam, technology, reinforcement method stability are introduced discusses advantages disadvantages retaining, construction technology analysis influencing fact...

ژورنال: علوم آب و خاک 2013
سید محمدعلی زمردیان, , پویان باقری , ,

Hydraulic conductivity is an important parameter in the design of geotechnical structures such as earth dam, floor construction, retaining walls and environmental structures. In unsaturated soils, hydraulic conductivity is a function of moisture content and soil water suction i.e. soil moisture characteristic curve. In this study, the values of unsaturated hydraulic conductivity in two soil typ...

2015
Feng Jin Yihong Zhou

Temperature control is a key factor which affects the construction quality of the mass concrete, which is also an important measure to prevent crack propagation. Lots of engineering practices show that most of temperature cracks come out in the form of the surface crack during the construction of the concrete dam. In addition, deep cracks and transverse cracks are usually developed by surface c...

Journal: :international journal of environmental research 0
s. tajziehchi department of environment and energy, science and research branch, islamic azad university, tehran iran s.m. monavari department of environment and energy, science and research branch, islamic azad university, tehran iran a.r. karbassi graduate faculty of environment, university of tehran, p.o.box14135-6135,tehran,iran s.m. shariat graduate faculty of environment, university of tehran, p.o.box14135-6135,tehran,iran n. khorasani graduate faculty of environment, university of tehran, p.o.box14135-6135,tehran,iran

despite the numerous advantages of large dams, there is still a deep suspicion about the real,long-term benefits and costs of their construction. land use change on a vast scale, displacement of a largepopulation of indigenous people, loss of biodiversity and production of greenhouse gas emissions, as well as environmental, socioeconomic and cultural consequences resulting therefrom, indicate c...

2011
Reza Gharehkhani

Sedimentation in reservoirs lowers the quality of consumed water, reduce the volume of reservoir, lowers the controllable amount of flood, increases the risk of water overflow during possible floods and the risk of reversal and reduction of dam's useful life. So in all stages of dam establishment such as cognitive studies, phase-1 studies of design, control, construction and maintenance, the pr...

2006
Olivier HAMERLYNCK Stéphanie DUVAIL Brahim OULD Maurice BENMERGUi

— The ecological functioning of the Senegal River estuary and Lower Delta was negatively affected by the construction of the Diama dam in 1986. As from 1994, managed flood releases were used to rehabilitate part of the floodplain and to create an artificial estuary. By simulating the pre-dam hydrodynamics, ecosystem functions were restored. This allowed the local inhabitants to resume their tra...

2011
G. Ioannou Julio C. Martinez

Eight successively refined simulation models for the earthmoving operations involved in the construction of a dam provide the foundation for illustrating the ease and effectiveness of modeling complex construction processes by using STROBOSCOPE, a modern simulation system based on a programming language that follows the activity-scanning paradigm. This approach and the use of characterized reso...

Journal: :IOSR Journal of Environmental Science, Toxicology and Food Technology 2012

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