ELi5 Why can’t we build massive transnational water pipelines (like with oil) to transport water from large fresh water sources to drier areas?

Question

Obviously this wouldn’t relieve the issues caused by low snowpack and decreasing precipitation, but it could supplement the water used for everyday living or agriculture during times of drought right?

In: 6

Answer 1

We do on a smaller scale. There are multiple several hundred mile long pipelines/aqueducts all over the country that transport water.