نتایج جستجو برای: arch dam

تعداد نتایج: 34185  

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2013
G D Pinha D Aviz D R Lopes Filho D K Petsch M R Marchese A M Takeda

The damming of a river causes dangerous consequences on structure of the environment downstream of the dam, modifying the sediment composition, which impose major adjustments in longitudinal distribution of benthic community. The construction of Engenheiro Sérgio Motta Dam in the Upper Paraná River has caused impacts on the aquatic communities, which are not yet fully known. This work aimed to ...

2012
Andrew Deines C. Adam Bee Richard Jensen David Lodge Andrew M. Deines David M. Lodge

Journal: :Science 2016
Qinglong Wu Zhijun Zhao Li Liu Darryl E Granger Hui Wang David J Cohen Xiaohong Wu Maolin Ye Ofer Bar-Yosef Bin Lu Jin Zhang Peizhen Zhang Daoyang Yuan Wuyun Qi Linhai Cai Shibiao Bai

China's historiographical traditions tell of the successful control of a Great Flood leading to the establishment of the Xia dynasty and the beginning of civilization. However, the historicity of the flood and Xia remain controversial. Here, we reconstruct an earthquake-induced landslide dam outburst flood on the Yellow River about 1920 BCE that ranks as one of the largest freshwater floods of ...

2013
Fu-gang Xu Xing-guo Yang Jia-wen Zhou Ming-hui Hao

Dam breaks of landslide dams are always accompanied by large numbers of casualties, a large loss of property, and negative influences on the downstream ecology and environment. This study uses the Jiadanwan landslide dam, created by the Wenchuan earthquake, as a case study example. Several laboratory experiments are carried out to analyse the dam-break mechanism of the landslide dam. The differ...

2012

The design of a gravity dam is performed through an interactive process involving a preliminary layout of the structure followed by a stability and stress analysis. This study presents a method to define the optimal top width of gravity dam with genetic algorithm. To solve the optimization task (minimize the cost of the dam), an optimization routine based on genetic algorithms (GAs) was impleme...

2011
Yingcheng Xu Li Wang Guoping Xia

Along with the development of virtual reality (VR) technology, simulation system as a new perspective of management methods and technical means in the progress of the project management plays an increasingly important role. This paper presents a Virtools-based visual simulation method and realizes a concrete dam pouring process. It proposes that the mode of the dam for a certain period could be...

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