For a non-point source of light, the shadow is divided into the umbra and penumbra.

By its very nature, groundwater aquifers are susceptible to contamination from sources that may not directly affect surface water bodies, and the distinction of point vs. non-point source may be irrelevant.

A spill or ongoing releases of chemical or radionuclide contaminants into soil ( located away from a surface water body ) may not create point source or non-point source pollution, but can contaminate the aquifer below, defined as a toxin plume.

Reserve staff work with local communities and regional groups to address natural resource management issues, such as non-point source pollution, habitat restoration and invasive species.

Topics may include issues such as investigating the impacts of non-point source pollution, understanding the role of social science in coastal resource management, and controlling invasive species.

Indicative for this shift are such elements as the codification of the precautionary approach and the establishment of requirements such as the " waste prevention audit ," the identification and control of the sources of contamination for certain materials, and the collaboration with relevant local and national agencies that are involved in point and non-point source pollution control.

These estuaries are susceptible to non-point source pollution that is harmful to the pups.

Professional carwashing is a " non-point source " of discharge that has the ability to capture these contaminants, normally in interceptor drains, so the contaminants can be removed before the water enters sanitary systems.

This led to a $ 3 billion sewer upgrade in the metropolitan area which has significantly improved water quality in the region, although much effort still needs to be expended to reduce non-point source pollution from the urban watersheds.

An overabundance of nutrient input from fertilizer run-off, sewage effluent, or non-point pollution will cause eutrophication.

Other issues that occur on a global level include an uneven contribution to climate change, point and non-point pollution, and air and water quality issues due to destructive wetland practices.

Point and non-point pollution is thus a major concern, as is the deforestation of its watershed on the southern slopes of the Northern Range.

* Dowrd, BM ; Press, D and Los Huertos, M ( 2008 ) Agricultural non-point sources: water pollution policy: The case of California ’ s central coast.

The river is heavily polluted, both by non-point agricultural and residential run-off from Marabella and the town of Gasparillo, and from industrial waste ( primarily oily run-off ) from the oil refinery at Pointe-a-Pierre owned by Petrotrin ( the State-owned oil company ).

Historically water levels have been declining in Pyramid Lake ; in addition, water quality has been impacted by upstream discharges including point and non-point sources.

Threats to water quality come from point and non-point discharges.

The building of shore management structures ( dikes, groins, seawalls ), the spraying of DDT ( and other pesticides ) to control the mosquito problem, the carving of ditches to drain wetlands, the filling of shore lowlands, the channelization of creeks, highway and sewer construction, neighborhood development, and a myriad point and non-point sources of household, automobile, industrial chemicals, and ocean dumping all contributed to growing toxicity of the bay.

soil pollution from toxic chemicals such as DDT ; energy blockade, the result of conflict with Azerbaijan, has led to deforestation when citizens scavenged for firewood ; pollution of Hrazdan ( Razdan ) and Araks Rivers ; the draining of Sevana Lich ( Lake Sevan ), a result of its use as a source for hydropower, threatens drinking water supplies ; restart of Metsamor nuclear power plant without adequate ( IAEA-recommended ) safety and backup systems

By encouraging countries to keep wastes within their boundaries and as close as possible to its source of generation, the internal pressures should provide incentives for waste reduction and pollution prevention.

Soil particles picked up during wind erosion are a major source of air pollution, in the form of airborne particulates —" dust ".

Since the Emperor was seen as a divine figure and linked to the deities, pollution of such extreme degree committed by the highest source was seen as extremely ruinous.

An example of a light pollution source, using a broad spectrum metal halide lamp, pointing upward in Uniqema Gouda, the Netherlands.

As a result tourism has become Malaysia ’ s third largest source of income from foreign exchange, although it is threatened by the negative effects of the growing industrial economy, with large amounts of air and water pollution along with deforestation affecting tourism.

Surface runoff, also called nonpoint source pollution, from a farm field in Iowa, United States during a rain storm.

Most pollution is from ships ; land generated pollution counts as the second most common source of pollution, ranging from mercury, to acidic or basic toxins.

Pollution is often classed as point source or nonpoint source pollution.

Shinto tends to hold negative views on death and corpses as a source of pollution called " kegare ".

He had mistakenly assumed that measurements of air particles he had taken near the source of pollution applied worldwide.

Another source of pollution are PM10 and PM2. 5 inhaled particulate matter and NO2 gases resulting from rapid growth in the construction of new buildings and expanding road infrastructure.

As a power source, even the best IFE reactors would be hard-pressed to deliver the same economics as coal, although they would have advantages in terms of less pollution and global warming.

In atmospheric sounding and noise pollution, ambient noise level ( sometimes called background noise level, reference sound level, or room noise level ) is the background sound pressure level at a given location, normally specified as a reference level to study a new intrusive sound source.

There were a number of collieries contributing to the pollution although the major source was the Whitworth Colliery.

Phosphorus is often regarded as the main culprit in cases of eutrophication in lakes subjected to " point source " pollution from sewage pipes.

Launched in 1993 with a loan of US $ 4. 5 million, it is designed to improve the infrastructure of Seychelles with regard to roads and airports or airstrips so as to encourage tourism as a source of income, while simultaneously supporting environmental programs in resource management, conservation, and the elimination of pollution.

Motor vehicle engine exhaust, particularly from motor scooters, is a source of air pollution in Taipei.

Due to the high energy usage, they are a major source of the pollution that causes urban air quality problems and pollutants that contribute to climate change.

Point source pollution is discharged directly from a specific site such as a municipal sewage treatment plant or an industrial outfall pipe.

Non-point source pollution poses the greatest threat to water quality in Maine communities, and Columbia is no exception.

The project is self-sufficient .. As of 1 July 2011, the Columbia University ceases to host this project and releases it to open source.

Kermit is an open protocol — anybody can base their own program on it, but some Kermit software and source code is copyright by Columbia University.

Le Page's description of Moncacht-Apé's route across the continent, which neglects to mention the need to cross the Rocky Mountains, may be the source of Lewis and Clark's mistaken belief that they could easily carry boats from the Missouri's headwaters to the westward-flowing Columbia.

There are no point source discharges within the Town of Columbia.

The falls not only provided early peoples a reliable source of food, but it later provided a convenient location for an easily constructed railroad bridge crossing the Columbia.

The solar arrays of the Hubble Space Telescope returned during missions STS-61 Endeavour and STS-109 Columbia are an important source of information on the debris environment.

Placer mining continues in many areas of the world as a source of diamonds, industrial minerals and metals, gems ( in Myanmar and Sri Lanka ), platinum, and of gold ( in the Yukon, Alaska and British Columbia ).

Ray Williston, the minister of land and forests for the provincial government at the time, proposed turning sections of the Peace and Columbia River basins known as the “ rocky mountain trench ” into a source of power generation.

The Columbia Journalism Review criticized Time for publishing a correction that implied that the quotation might be real, despite admitting that no source could be found for it.

The dams flooded large areas within British Columbia, but would prove to a very stable and renewable source of power for the province.

* Columbia AppleTalk Protocol ( CAP ) was an open source implementation of AFP and AppleTalk from Columbia University that has been discontinued and has fallen out of use.

Other labels found in Washington list a source of the water as Hope Springs, Hope, British Columbia.

Its largest tributary, the Snake, travels from its source in Yellowstone National Park in Wyoming before joining the Columbia.

His primary mission was to find the source of the Columbia River ( Columbia Lake ), which he did.

At this time, Brown confirmed that he had been the source of four mainstream media stories that had received attention from the Columbia Journalism Review because they bore striking resemblance to the opposition research being disseminated by Citizens United.

A short time later, the Columbia River in Oregon became a source.

According to Professor Mahmood Mamdani from Columbia University, opposition to the policy of annihilation was largely the consequence of the fact that colonial officials looked at the Herero people as potential source of labor, thus economically important.

In 2008, SuperTux was used as a game for children by school district # 73 in British Columbia, which had decided to transition to open source software.

** Kootenay National Park, British Columbia national park, source of the Kootenay River

Mount St. Helens has been a significant external natural source: although located entirely in the United States, its eruption created air pollution in parts of British Columbia.

A year later, however, the Columbia Automobile Company was in shambles thanks to internal corruption and low demand for electric vehicles, and the Electric Vehicle Company turned to the Selden patent as an alternative source of revenue.