Answer:
Natural groundwater recharge occurs as precipitation falls on the land surface, infiltrates into soils, and moves through pores spaces down to the water table. Natural recharge also can occur as surface water leakage from rivers, streams, lakes, and wetlands or For example groundwater can be artificially recharged by redirecting water across the land surface through canals, infiltration basins, or ponds; adding irrigation furrows or sprinklers systems; or simply injecting water directly into the subsurface through injection wells.
A 2014 Reuters analysis found that, before 1971, water reached flood levels no more than five days every year (on average) in several U.S. east coast cities. Since 2001, however, that number has risen to 20 days or more (on average).
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The corona the outer layer of Sun is not visible during day time because bright sun. We can not see stars during day time. This is because during the normal daytime, the photosphere's bright light outshines the corona, like it does the chromosphere, but telescopes specially designed to take photographs of the inner corona, calledcoronagraphs, can block out the light of the photosphere and help astronomers study its properties a bit.
