Because if you only focus on solving the problem of water management systems (water management) only, without looking at what the risks might not have caused climate change alone, but may be at risk from the people.
Because if you only focus on the solution of a system of water management (water management) alone without looking that the risk may be due to climate change alone. The potential risks of people.
Because if the only solution of water management system (water management) only โดยที่ไม่ได้ perceived risk may not be caused by climate change alone. But the potential risk from person to person.