Question

the drains on rivers have gradually lost it's water storage capacity in present day . write any two reasons for it ?

Answer 1

Answer:

Pollution and global warming

Answer 2

Answer:

The drains on rivers have gradually lost their water storage capacity in present-day due to:

1. Evaporation
2. Seepage

Explanation:

A reservoir, also known as a river basin, is an open-air storage area (often built by masonry or earthwork) where water is collected and stored in large quantities before being drained for use.

Many water delivery systems across the world use reservoirs as a key component. They are slowly losing water as a result of the following factors:

1. Evaporation

• Water evaporates from the open surfaces of lakes, ponds, canals, rivers, reservoirs, and other bodies of water due to the sun's heat energy. Evaporation is a significant source of water loss in semiarid and arid areas.
• Evaporation loss is usually calculated as a direct function of the exposed surface area.
• Temperature, wind speed, relative humidity, sunshine, and altitude all influence the rate of evaporation.

2. Seepage

• Water resources engineers are concerned with water loss from water bodies such as canals, reservoirs, and weir ponds due to seepage.
• It is so not just because water is lost, but also because water seeps through canal embankments, dam and weir bodies, and hydraulic structure foundations, attempting to undermine the medium through which it runs.
• Furthermore, seeping water exerts upward pressure, jeopardizing the hydraulic structure's stability.