FuturePAF
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It actually does evaporate my dear. that's the very definition of disappearing into thin air.
The dispute of Sind is over 2 things. Some of the dams will not just store and forward, but also the stored water will be distribued into Punjab ( to expand nnn thousands of acres growing wheat). Sindh asked for a certain amount of river water + a certain amount to flow into the sea to prevent ingress of sea into Sindh areas. I will leave it to the reader to reseacrh what these amounts are. But Sindh has not been getting this water both sea flow and agriculture as per the Indus water treaty for decades.
All the people including Musharraf lied when they say that so many mega acre ft of water goes into the sea. outright lie. to find out how much water flows into the sea, you have to find annual Kotri barrage outflow ( as that the last water storage on the river.).
Once you have the numbers and can say this is why water wastage is there, you can say you can use water from dams.
Aside from building Dams, about 40% of water in the canals ( yes 40%) IS WASTED THRU LEAKAGES. How about fix those leakages.
We need to fix the leaking canals. Cementing them may help, and should be studied.
A presentation of proposed dams that should solve the dispute between the provinces can be found here:
Look at the dams on page 61, and keep going. You will see what is possible and where. The Soan Dam (38 MAF storage and 18 GW potential Hydroelectric power potential) in Punjab on the Soan river and Bhit reservoir (15.5 MAF storage, not sure about cost) for Karachi, would save enough water before it is lost to the sea. It would also prevent flooding and generate electricity. Soan Dam would cost US $14.1 Billion in 2008 Dollars, so adjust for inflation.
Soan Dam is best suited to store on a tributary off of the main Indus river, and store water coming out of Mangla and Tarbela. It also prevent any Kalabagh drama. It is also inside Pakistan proper and can seek foreign investment. With 18 GW potential, its $16.83 Billion cost adjusted for inflation would make it one of the most efficient dams, and also create a nice large lake just south of Rawalpindi for Tourism.
https://data.bls.gov/cgi-bin/cpicalc.pl?cost1=14.1&year1=200801&year2=201807
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