Estudio experimental y numérico de la estabilidad de la pendiente aguas arriba en un embalse de presas de tierra en condiciones de extracción rápida

The rapid ‎drawdown of the dam reservoir is one of the most common situations occurring in the lifetime of a dam. For this reason, one of the main factors in the design of the upstream slope is the rapid drainage of the reservoir. In this case, the upstream slope is in a critical condition and the slope may be unstable. When the water surface in the reservoir is drawdown suddenly, the water level in the dam body does not decrease at the same time as the reservoir water level. The analysis of seepage from the earth dam body and calculation of the water loss play an important role in calculating the amount of pore water pressure, and, consequently, the stability analysis of the dam body. In addition, any seepage analysis is dependent on the hydraulic properties of the dam materials. In order to investigate the effect of hydraulic conductivity on the rapid drawdown of water level and the seepage, an experimental model was constructed of an earth dam. By accurate measurement of hydraulic parameters of the materials in saturated and unsaturated media, the flow through this model was modeled using a disk penetrometer by seep/w software. The results were then compared with the observed data.The rapid ‎drawdown of the dam reservoir is one of the most common situations occurring in the lifetime of a dam. For this reason, one of the main factors in the design of the upstream slope is the rapid drainage of the reservoir. In this case, the upstream slope is in a critical condition and the slope may be unstable. When the water surface in the reservoir is drawdown suddenly, the water level in the dam body does not decrease at the same time as the reservoir water level. The analysis of seepage from the earth dam body and calculation of the water loss play an important role in calculating the amount of pore water pressure, and, consequently, the stability analysis of the dam body. In addition, any seepage analysis is dependent on the hydraulic properties of the dam materials. In order to investigate the effect of hydraulic conductivity on the rapid drawdown of water level and the seepage, an experimental model was constructed of an earth dam. By accurate measurement of hydraulic parameters of the materials in saturated and unsaturated media, the flow through this model was modeled using a disk penetrometer by seep/w software. The results were then compared with the observed data

Leeds: a geological background for planning and development : 1:10000 sheets SE23NW, NE, SE and SE33NW, NE, SW, SE: parts of 1:50000 geological sheets 69 (Bradford), 70 (Leeds), 77 (Huddersfield) and 78 (Wakefield)

This study, carried out between 1989 and 1991, was commissioned by the Department of the Environment and funded jointly by the Department and the British Geological Survey. Its principal aim was to produce a synthesis of geological information relevant to the land-use planning for development and redevelopment for a large part of the Leeds district. This report is aimed at those involved in planning and development. Much of the information is provided on a series of thematic maps, each of which concentrates on a specific aspect of the geology relevant to landuse. These are suitable for use in forward planning for development and conservation, and as a background to desk studies, prepared in advance of specific development proposals. However, they must not be used in place of results of adequate site investigations when development is being considered. In addition to the information contained in the report, sources of other more detailed data are indicated

Hidden Valley Coal Company v. Utah Board of Oil, Gas, and Mining, Utah Division of Oil, Gas, and Mining : Brief of Appellant

On Appeal From the Third Judicial District Court County of Salt Lake, State of Utah The Honorable Glenn Iwasaki Third District Court Judg

Hidden Valley Coal Company v. Utah Board of Oil, Gas, and Mining, Utah Division of Oil, Gas, and Mining : Brief of Appellant

On Appeal From the Third Judicial District Court County of Salt Lake, State of Utah The Honorable Glenn Iwasaki Third District Court Judg