Ethiopia began constructing the Grand Ethiopian Renaissance Dam (GERD) in 2011 on Blue Nile near borders of Sudan for electricity production. The dam was constructed as a roller-compacted concrete (RCC) gravity-type dam, comprising two power stations, three spillways, and Saddle Dam. main is expected to be 145 m high 1780 long. After filling estimated volume water bounded about 74 billion m3. f...

abstract: This work aims to verify the influence of foundation and reservoir on dynamic behavior concrete gravity dams in terms natural frequencies, vibration modes for a free analysis; maximum displacements stresses at singular points structure seismic excitation. The dam-reservoir-foundation interaction was investigated through modal transient analysis by finite element method via ANSYS APDL ...

in this paper, a new formula is applied for the calculation of gravity anomalies from a cylinder model representing a geological body. compared to conventional methods, this new development allows the cylinder to be freely oriented in space. 38 gravity forward models are produced each of which anomaly attributes are calculated. then a linear relationship is established between attributes and so...

Cosmologically motivated theories that explain small acceleration rate of the Universe via modification of gravity at very large, horizon or super-horizon distances, can be tested by precision gravitational measurements at much shorter scales, such as the Earth-Moon distance. Contrary to the naive expectation the predicted corrections to the Einsteinian metric near gravitating sources are so si...

This study presents a procedure for modeling the heat transfer process in concrete dam, taking into account time-varying boundary conditions on upstream and downstream sides of dam (i.e., water level reservoir, spillover, insolation, shading) which affect temperature dam. The large arch-gravity Moste Dam (in North West Slovenia) was analyzed, where an automated system measurement temperatures, ...

Dam is set in large hydropower station. Cushion pool built behind the dam for flood discharge and energy dissipation of reservoir. Operation some time, dewatering structure safety which study, then cushion filled. Temporary dewater filled system used by previous engineer, but arranged controlled hard. Based on need filling, an example Baihetan station, necessity feasibility are study. Then a pe...

Cosmologically motivated theories that explain small acceleration rate of the Universe via modification of gravity at very large, horizon or super-horizon distances, can be tested by precision gravitational measurements at much shorter scales, such as the Earth-Moon distance. Contrary to the naive expectation the predicted corrections to the Einsteinian metric near gravitating sources are so si...

Genetic correlations between purebred and crossbred performance and purebred and crossbred heritabilities were estimated for egg production traits of laying chickens using a multivariate sire model accounting for additive relationships between sires. Two sire lines, denoted lines 1 and 2, were crossed to one dam line to produce crossbred progeny. Records for egg weight, egg specific gravity, an...

With the change of seismic parameter zoning map China (GB 18306-2015), grade reservoir dams in some areas had changed. At same time, standard for design hydraulic structures 51247-2018) also put forward new requirements calculation dams. In order to ensure safe operation dams, it is necessary review safety based on finite element numerical simulation technology. Taking retaining dam section a g...