I heard that there were alligators in the sewers.

Valves control fluid flow and regulate pressure.

And our brains our celebrated brains reflect a drainage of a tidal marsh.

For all the activities like shaving, showering, grooming etc.

The brain drain where all of the most educated and qualified leave and never come back.

The city now relies on flood barriers and augmenting drainage from canals by pumping and building drain tunnels, but parts of Bangkok and its suburbs are still regularly affected by flooding.

Often what jams us up is sewage.

The villages used irrigation canals and drainage systems, making agriculture very efficient.

When untreated, sewage can have serious impacts on the quality of an environment and on the health of people.

In 1662, Sir Christopher Wren invented the mechanical, self emptying, tipping bucket rain gauge.

The sewage is still thrown in the bay with virtually no treatment.

The drainage systems are not able to handle the water pressure.

Another common complaint relates to the sewage smell inside their houses.

Well, the reason we're doing this offshore is because if you look at our coastal cities, there isn't a choice, because we're going to use waste water, as I suggested, and if you look at where most of the waste water treatment plants are, they're embedded in the cities.

It's a dendritic drainage pattern that can be formed only by the flow of liquids.

Heavy downpours resulting in urban runoff overwhelming drainage systems, and runoff discharge from upstream areas, are major triggering factors.

And if we jam nutrients, sewage, fertilizer in the base of that food pyramid, it can back up all through it.

Over 2.5 billion people in the world today do not have proper access to water and sanitation.

The wastewater produced by the city still is not treated and is discharged raw in Santo Antônio River.

But there are still major problems in local infrastructure, such as paving roads, sewage and water supply.

The upper part of the drainage basin of the Moa River is located in the south of this region.

Failure of the nasolacrimal drainage system can cause dry eye or leakage of tears onto the face.

Some of the short narrow channels along the walls of Ma'adim are probably sapping channels.

So different cities around the world treat their waste water differently. Some cities process it.

Michael Pritchard Okay. We've got some runoff from a sewage plant farm.

If it weren t for the problem with the sewers, we would already have built the house.

According to the organisation, half the population in Rio de Janeiro is still without mains water and sewerage . This accounts for nearly 3 million citizens who are to drink dirty water or throw sewage directly into the rivers, lakes and beaches of this wonderful city .

Malaria, the most widespread disease, was successfully fought through advances in health care, the use of DDT, and through the draining of swamplands.

One exposes the problem of sewage spill on São Conrado Beach.

If you include all the drain, it takes more than a hundred pints of water to make a pint of beer.

This uncontrolled growth has caused significant difficulties in terms of traffic, sanitation (including access to safe water), and pollution.

New Orleans As the eye of Hurricane Katrina swept to the northeast, it subjected the city to hurricane conditions for hours.

Regal executed his finisher, the Regal Cutter, on Stratus and Stephanie then dumped sewage over Stratus' body.

The waste water that leaks out is water that already now goes into that coastal environment, and the algae that leak out are biodegradable, and because they're living in waste water, they're fresh water algae, which means they can't live in salt water, so they die.

Lakes may form in basins where there is sufficient precipitation or meltwater from glaciers above.

Many of these canals have since been filled in or paved over, but others still criss cross the city, serving as major drainage channels and transport routes.

At the same time a treatment plant that would treat the waste water before reaching the beach was created, but the Rio Águas , which is responsible for the station, does not do its work and dumps all the sewage in natura through this culvert.

The pyramid, if we jam things in the bottom, can get backed up like a sewer line that's clogged.

In southern China in particular, toxins have been discharged with sewage by mining operations and made their way into rice paddies.

As of November 2010, less than 50 of the city's sewage receives proper treatment.

And when we were walking through the narrow alleys, it was literally impossible not to step in the raw sewage and the garbage alongside the little homes.

It's a city with about all streets of urban zone paved and services of water and sewage to all people.

Urban planning guides and ensures the orderly development of settlements and satellite communities which commute into and out of urban areas or share resources with it.

The main construction plans to start draining water from other rivers and reservoirs in the country are only due to be ready in 2016, according to Sabesp s own schedule.

Dhaka's unclean water bodies including an inadequate sewage system are blamed for the growth of mosquitos and the diseases they spread.