It seems rather interesting that everyone is worried about water resources when on our planet we have two thirds of our landmass covered with water.
We are overflowing with water, but the problem is humans and plants need fresh water, not salt water. And only a small percentage of the water outside the ocean is fresh, in clouds, ice, or ground water.
We know our freshwater is in lakes, rivers, reservoirs, and under the ground.
Unfortunately, due to the increase in population we are using up the groundwater faster than it is getting replenished.
We are finding it difficult to maintain adequate amounts of water in our reservoirs for our drinking water and civilization, while still allowing water to flow out of various dams which have hydroelectric power.
Our water resources are tied to energy and agriculture, and life as we know it.
Freshwater supplies are a problem everywhere on the planet, it’s a vital resource, and thankfully it replenishes over time due to the weather patterns and weather flow.
We all know about how evaporation works from the ocean, and how the clouds flow over the landmass and then allow rain, which hopefully will fill up our lakes, rivers, and reservoirs.
Unfortunately sometimes that rain comes to far and few between, or it comes all at once in a giant deluge causing massive flooding. Massive flooding also causes the wrong type of run-off to get into freshwater supplies, making it unusable.
In many nations such as the Middle East they have giant desalination plants. And this is something we are going to need to do the United States as well, as much of our population lives fairly close to the ocean, and uses almost all of the runoff water for our cities.