We have conducted airborne measurements over the Greenland ice sheet from the NASA P-3B aircraft using a 150MHz coherent radar depth sounder to obtain extensive ice sheet thickness measurements. Simultaneous measurements of ice sheet elevation were also made using a laser altimeter. In outlet glacier areas along the ice sheet margin, the ice surface is characterized by a very rough, crevassed s...

This article uses the finite element software ABAQUS to establish a three-dimensional model based on overflow dam section 12 # ~15 and surface outlet of Chushandian gravity dam. The stress displacement distribution under normal water storage level are analyzed; On this basis, modal analysis is conducted study impact dam's own conditions operation research shows that: (1) Under condition height ...

It is located 650m above sea level along the boundary between the North Caribbean and Pacific slopes, near the Southern end of the volcanic Guanacaste mountain range. In the early 1980s the lake's main outlet was dammed and the outflow was diverted into Arenal Reservoir. Lake Cote was first studied in 1990-1991, and later in 2001, before it was again modified by raising its dam by one meter to ...

in this study, mixed convection heat transfer and local and global entropy generation in aventilated square cavity have been investigated numerically. the natural convection effect isachieved by a constant heat flux imposed at the bottom wall and cooled by injecting a coldfollow. in order to investigate the effect of port location, four different placementconfigurations of the inlet and outlet ...

The article is devoted to the issues of assessing reliability and safety hydraulic system located on Karadarya River in Andijan region Republic Uzbekistan. results actual measurements their comparisons with requirements for hydropower facilities according technical design current standards building codes rules (BCR) are presented such key indicators as: maximum minimum costs, marks water horizo...

Among the structural and non-structural methods of flood control, rockfill dams are a kind of detention structures that increase travel time and reduce the maximum instantaneous flood discharge. Due to the rapid and automatic effect of these dams, flood reduction happens more quickly. In this research, the best arrangement of rockfill dams at Taleghan basin was determined based on the cost of r...