CURRENT AFFAIRS

Detailed explanation-1: -Researchers at The Ohio State University have created high-resolution maps of points around the globe where groundwater meets the oceans-the first such analysis of its kind, giving important data points to communities and conservationists to help protect both drinking water and the seas.

Detailed explanation-2: -As a result, seawater is drawn into aquifers during winter until fresh water arrives. As fresh water reaches the aquifers in spring and summer, the water table slowly rises and reaches a threshold where momentum tips and forces water-now fresh and salty-to flow back toward the sea.

Detailed explanation-3: -Submarine groundwater discharge (SGD) is a hydrological process which commonly occurs in coastal areas. It is described as submarine inflow of fresh-, and brackish groundwater from land into the sea.

Detailed explanation-4: -Coastal groundwater discharge can control the salinity, nutrient budget and productivity of coastal lagoons31, salt marshes32, and mangroves33, and the associated solute flux can cause eutrophication34, algal blooms35, and the degradation of coral reefs36, but it can also increase fish fitness37.