Friday, July 25, 2008

A short note on Columbia River

The Columbia River is a river located in British Columbia and the Pacific Northwest of the United States. It is the biggest river in volume flowing into the Pacific Ocean from the North America, and the second biggest in the United States. It is the biggest hydroelectric power producing river in the North America. It starts from its headwaters to the Pacific Ocean it flows 1,270 miles (2,044 km) and it drains 258,000 square miles (415,211 s-kM).
Columbia River is the largest river in the planet that has no delta. The river continues flow west with one small north-northwesterly-directed and stretch near Portland; Vancouver, the Washington; and the confluence with the Willamette River. On this sharp turn the river's flow slows by a long way and it drops the sediment that would generally form a delta.

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Monday, July 21, 2008

Women Independence

The research refers to women born in 1958 and aged 33 in 1991 - when last interviewed in the National Child Development Study. They entered employment in the mid-1970s, as Equivalent Opportunities became law. They will also be facing retirement under the new pension preparations introduced in the late twentieth century.

The amount contributed to the family income by 33-year-old women is similar to that of women in other age groups. The increase in women's normal cash contribution in recent decades has been mainly through an increase in two-earner couples. There is nevertheless pretty a way to go before all earn as much as their husbands.

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Thursday, July 10, 2008

Freeway and its Design features

A freeway (is also superhighway, expressway or motorway as further explained below) is a multi-lane public road or highway planned for high-speed travel by great numbers of vehicles, and having no traffic lights, stop signs, or other regulations requiring vehicles to stop for cross-traffic.
Freeways have high speed limits and multiple lanes for travel in every direction. The number of lanes may differ from four or six in rural areas to as high as sixteen or eighteen in definite global cities. Freeway entrances and exits are restricted in number, and are intended with special onramps and off ramps, so as to make sure that vehicles do not disrupt the most important flow of traffic as they enter or leave the freeway. In few countries, the exits are numbered. Exit numbering may perhaps be by mile or kilometer, or in a simple sequential fashion. Where freeways cross, engineers give interchanges with elaborate ramp systems that permit for smooth, uninterrupted transitions connecting all through routes (as funds permit).

Adult Halloween Costumes

Wednesday, July 02, 2008

Water Pollution

Organic wastes such as sewage impose high oxygen demands on the receiving water leading to oxygen reduction with potentially severe impacts on the whole eco-system. Industries release a variety of pollutants in their wastewater including heavy metals, organic toxins, oils, nutrients, and solids. Discharges can also have thermal effects, particularly those from power stations, and these too decrease the available oxygen. Silt-bearing overflow from many activities including construction sites, deforestation and agriculture can inhibit the penetration of sunlight through the water column, restricting photosynthesis and causing blanketing of the lake or river bed, in turn damaging ecological systems.

Adult Halloween Costumes