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Remote Sensing Applications

The application of remote sensing satellite data in environmental protection.

High-resolution remote sensing information technology applications in the field of environmental protection, the development by leaps and bounds, and played an important role in promoting the development of environmental science. Gradually from the macro into the close, to study the process of desertification, land salinization and soil erosion and ecological deterioration of the environment (pollution such as acid rain on vegetation), industrial wastewater and sewage water pollution, oil on marine research areas pollution provides a large amount of data and information, and provide a basis for scientific decision-making for environmental management and governance.

The application of satellite data in urban environmental pollution

The city is a densely populated area, the distribution in each city with all kinds of factory chimneys and high energy consumption and environmental pollution, rapid economic development, should adopt the traditional mode of management control and oversight can only trade-off, many cities are used satellite remote sensing multispectral photography means to carry out effective monitoring and management, according to the same feature different spectral characteristics, computer processing of high-resolution satellite data downlink major pollutants monitoring environmental pollution and can accurately locate the source of pollution.

By remote sensing satellite imagery intuitive monitoring industrial wastewater emissions from urban sewage enterprises, can be made of the extent of the environmental impact assessment in a timely manner, as shown in the wastewater discharge pipe (at B and C at the above) reservoir underground passage emissions, from the picture you can clearly monitoring the precise location of the pipeline, due to serious pollution, the river surface accumulated a thick layer of oil and planktonic objects a tremendous negative impact on the environment can be seen at A .

Means of the application of remote sensing to quickly monitor the type of water body pollution sources, location distribution and the distribution of water pollution. Discharge area and the water temperature is generally higher than the natural water temperature, thermal infrared remote sensing technology can be easily detected. Temperature resolution up to 0.2 ° C. Various factories discharged into the sewage different substances contained in components, resulting in different color of sewage polluted water bodies can be identified by measuring the density of remote sensing images. Make sure these polluted water bodies often use color density method, QU contaminated water sample by conventional methods to establish the type and concentration of water pollution as well as remote sensing image density.

Stormwater runoff

The U.S. Environmental Protection Agency provides non-water pollution in an urban population of more than 80,000. To simulate and estimated potential urban runoff pollutants tasks, remote sensing altitude resolution, multi-spectral satellite images is very suitable for measuring table non-penetration area, such as the roof, streets and parking lots. permeable area, such as planting trees and grass coverage. use of the surface area and runoff coefficient can be estimated contaminated area by near-infrared color data and obtain the dividing line can provide a runoff area information parameters, for the prevention of storm The losses caused ready.

Discovery hazardous chemical spillage

Can take advantage of high-resolution satellite images of the the feature surface contamination and ambient pollution timely monitoring and detection, such as through the changes of the surrounding area for the storage of hazardous chemicals, early detection of missing an event occurs.

Assessment of oil spill

Available satellite images containing suspended substances, such as hydrocarbons, sediment, foam or dye, identified and measured in advance to curb and make effective assessment.

Air Pollution

The satellite images can be detected by the accidental release of toxic chemicals, for example, if the tank fire can be visible satellite image can be measured and air dispersion of pollutants and strict precautions against the impact of the source region, by detecting and control in decision support.

The Australia fires of remote sensing satellites in 2009, Sendai, Japan earthquake

Flood boundary plan

Can be measured to the boundary on the accuracy of the flood control in the range of a few meters, the boundary can be determined by individual buildings to assess the flood-prone area.

Air Pollution

Accurate positioning through the use of satellite images to determine the monitoring of coral reefs, seagrass beds, mangroves, salt marshes, chlorophyll, precipitation contributed greatly to the development activities in coastal areas, you can assess the environment is suitable for the development of ports, tourist facilities, aquaculture, fisheries.

2.4 m multispectral images can be used to detect wetlands, sandy beaches, submerged vegetation, etc., and assess the extent of the damage caused by the storm, coupled with the 0.6 m panchromatic image, blue and green channels permeable characteristics. Detect such as riverbeds, channels, beach, wave-type structure.

The application of remote sensing satellite data in marine water pollution

Water different substances in each band of the image of the ocean color display different degrees. By visual, photoelectric method interprets interpretation, or processing a variety of different modes of application of computer, the sea suspended sediment, plankton, dissolved organic matter, oil slicks and other pollutants such as ocean color can get the information.

The use of remote sensing satellites visible light remote sensor on the coast with a color scan obtained above all the necessary information.