نتایج جستجو برای: dam construction

تعداد نتایج: 220304  

Journal: :international journal of environmental research 0
w. zhang institute of hydraulic construction, china hydro cooperation, guiyang, china w. w. yao institute of hydraulic construction, china hydro cooperation, guiyang, china q. zhang institute of hydraulic construction, china hydro cooperation, guiyang, china q. zhang institute of hydraulic construction, china hydro cooperation, guiyang, china

abstract:dam construction providebenefits to local communities including hydropower generation and flood protection, but also harmsfish species by altering physical habitat andproviding pollution during the construction process. evaluating river reaches habitat suitability level mayknow how the habitat and which extentaffected by dams. this study used a systems analysis approach to preliminaril...

ژورنال: علوم آب و خاک 2013

Excess pore water pressure in clay core dams during construction and primary filling reservoir (first impounding) causes initiation and progression of hydraulic fracture. In this research, the instrumentation data during construction and first filling reservoir (first impounding) was analyzed. It measured internal deformations, pore water pressures and total vertical stresses and compared with ...

2015
Daeryong Park Yeonjoo Kim Myoung-Jin Um Sung-Uk Choi Vincenzo Torretta

This study investigates how the priority rankings for dam construction sites vary with multi-criteria decision making (MCDM) techniques and generation approaches for incomplete information. Strategic environmental assessment (SEA) seeks to recommend sustainable dam construction sites based on their environmental and ecological impacts in a long-term plan for dam construction (LPDC) in South Kor...

2013
Peter C. Sakaris

Hydrologic alterations resulting from dam construction and other human activities have negatively impacted the biodiversity and ecological integrity of rivers worldwide (Dudgeon 2000, Pringle et al. 2000). These alterations have included habitat fragmentation, conversion of lotic to lentic habitat, variable flow and thermal regimes, degraded water quality, altered sediment transport processes, ...

2010
Iván A. Contreras Samuel H. Hernández

Leakage is a major safety issue that, if left unchecked, may result in dam failure by various mechanisms. There is enormous pressure on dam operators to repair leaks without significant delays. Frequently, the need to reduce the risk of failure or control water loss has led to costly remedial repairs that are planned and executed without a complete understanding of the problem. A lack of approp...

2009
A. Sayadi A. Khodadadi

Today Environmental Impact Assessment (EIA) is known as one of the most important tools for decision makers in the construction of civil and industrial projects towards sustainable development. In the past, projects were evaluated based on cost and benefit analysis regardless of the physical and biological environmental effects and its socio-economical impacts. According to the Department of En...

Journal: :international journal of environmental research 2014
s. tajziehchi s.m. monavari a.r. karbassi s.m. shariat n. khorasani

there is much discussion going on lately whether dam construction is economic or not in termsof social consequences. accordingly, various techniques and software have been released to estimate the real social cost of dam construction among which, the software simpacts has been used extensively by researchers, worldwide. the present version of simpacts software only focuses on adverse effects of...

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 p. narimisa deputy planning and manufacturing, tavanir company, tehran, iran

there is much discussion going on lately whether dam construction is economic or not in termsof social consequences. accordingly, various techniques and software have been released to estimate the real social cost of dam construction among which, the software simpacts has been used extensively by researchers, worldwide. the present version of simpacts software only focuses on adverse effects of...

Journal: :Concrete Journal 1994

2012
Frank HERING Roger SCHLEGEL Gerd LEYENDECKER

SUMMARY No RCC dams have been built in Germany to date. HRB Waldbärenburg could be the first one. This project is part of the national flood control programme of the Federal State of Saxony in Germany and will go into the approval procedure at the end of 2012. The RCC dam technology has been chosen as it provides environmental advantages against other design alternatives: essential lower impact...

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