Explain application of remote sensing in civil engineering.

Explain application of remote sensing in civil engineering.
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2 Answers

Answer :

Following are the applications of remote sensing in civil engineering.

1. Revision of (existing) topo sheets: The rapid revision and updating of existing topo (graphical) sheets can be carried out speedily with the help of aerial photography (which is also a branch of remote sensing) and satellite imagery.

2. Alignment of (new) highways and rail-lines: the location of most economical alternative sites for such works can very well be carried out speedily by making use of aerial photographs and satellite imagery.

3. Location of (gravity) dam sites: for a gravity dam, it is necessary to have very good foundations in the form of hard solid strata of rocks. Geological investigation of the existing rock in and around the propose dam site can be carried out by aerial photographs and or satellite imagery. Geological features such as folds, faults, dykes, fracture etc. can be determined by the remote sensing technique.

4. Tunneling: Tunnel should not be aligned along the fractured zone or faults in the rocks. Remote sensing helps in furnishing all such information and thus ensures safety of tunnel during its construction stage.

5. Silting of storage reservoirs, harbors etc.: Silting of storage reservoirs reduces its capacity, whereas silting of harbors leads to reduction in the navigational depth and thus renders it useless. Remote sensing technique that makes use of satellite imagery (in the infrared region) gives idea about the silting of reservoir qualitatively and to some extent quantitatively. 
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Answer :

Applications of remote sensing –

Remote sensing is widely applicable in the following areas.

1. Resource exploration – The underground resources like fossil fuels, mineral and oil deposits can be explored using remote sensing. The geological features like faults, fractures, dykes etc can be determined using this.

2. Environmental prediction – The prediction of probable precipitation and related environmental changes can be made base of remote sensing techniques.

3. Land use and land cover analysis – By using remote sensing principles, one can analyse land use and land cover of any locality.

4. Flood or feminine relief - Remote sensing is very effective in case of flood and drought prone areas.

5. Navigation routes – The navigational routes of road, railway and airways can be controlled using remote sensing.

6. Determination of Topography – The various ground features like hill, valley, trees, houses etc. can be determined in highly steep slopes.
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