Which of the following is a brackish water resource?

Answer: Lagoons contain brackish water, which is a mixture of fresh water and seawater. Brackish water has salinity between freshwater and seawater (roughly 0.5–30 parts per thousand). How lagoons form: They typically occur along coastal regions where seawater mixes with river, lake or groundwater, creating intermediate salinity conditions. Canals are man-made channels that usually carry fresh water for irrigation and navigation.

Reservoirs store river or rainwater and are generally fresh, unless special salinization processes occur.

Rivers are primarily freshwater; brackish conditions appear mainly near estuaries, where sea and river water mix.