Question

Gives the merits and demerits of tapping a flowing surface water and conventional method of its treatment to produce potable quality water.

Answer 1

${\huge {\mathfrak {Answer :-}}}$

➡️ Trapping Sediments and Retaining Particulates

Wetlands trap sediment and retain particulates from both onsite and offsite sources. Trapping sediments contrasts with the removal of nutrients because sedimentation and particulate removal emphasize physical processes rather than elements and compounds, many of which are in the dissolved state.

➡️ Merits -

There are two primary benefits of trapping sediment. First, the removal of particulates reduces the load of particle bound nutrients, heavy metals, pesticides, and other pollutants into groundwater, and nearby rivers and streams. Second, at natural sustainable levels, these inputs are necessary for the overall maintenance of the nutrient budget and associated characteristic plant and animal communities of wetlands.

That's it..