primarily the topic is revolving around the following point
how the water crisis endanger national unity?

• a threat to the economy(as water security, food security, and energy security inextricably linked).
  
• breed social unrest and health hazards (unemployment, poor socio-economic indicators etc)
  
• the threat to the national integrity and security (internecine conflict among federating units and political exploitation of water share )

material resource

1. read PILDAT report to comprehend internecine conflict among federating units for water share(Kala Bgh dam is a classic example on that part for disharmony among provinces )
   
2. read columns in the newspaperthat how water shortage ignite a chain of the social unrest (eg. in Karachi every second day there was a demonstration against water shortage and so on )and economic crisis (as agriculture took 80% of water and it amounts 40% of employment and 70% of export so shortage of water mean socioeconomic conflict which in turn endanger national unity)