Phutkera gayo yo umer ni
like ,comment and subscribe my youtube channel.........
Land Subsidence!
What is Land Subsidence? - It is the gradually lowering of land which is the gradual shifting down of the land due to natural causes, minerals and oils, and other factors like over groundwater extraction and aquifer. This phenomena is commonly seen in different natural disaster also like after earthquake also due to some fault line or void below earth creates downward movements, also due to natural compaction like oils, minerals etc. , also due to over ground water extraction which reduces the level of water level: aquifer which when reduced forms a void and this results in lowering of land. Different phenomena like poor drainage, deposition of alluvial fan like sand, silt , clay etc also create land subsidence. The best examples of land subsidences are found in different areas around the world : 1. Jakarta land subsidence which is due to poor drainage system . 2. Land subsidence in Mexico city as shown in buildings deformation . 3. It is best seen in the research paper give...
Comments
Post a Comment