Provide at least three freshwater and three ocean water resource challenges ?

Question

Provide at least three freshwater and three ocean water resource challenges ?

Answer 1

Here are my takes... even though I don't really know what exactly you are asking for.

Frenshwater

1. Soil runoff due to uncovering the surface soil.

2. Algae bloom related fish kill in drought years

3. Uncontrolled gray water discharge by residents, ranches, and farms along the bank

4. River diversion from a rural area river to a populatde area river

5. Damming for agricultural use

Seawater

1. Desalinization

2. Controlled and uncontrolled discharge due to coastal industrial facility that result damage to coastal ecosystem

3. Salt water intrusion around delta areas and coastal estuaries.