Swas brother, you got me totally wrong. I was not questioning the validity/use of Pattiseema. Rather, I mentioned it as a reference to refute the premise that we need to build 300 TMC capacity reservoir in west godavari as per option 1 mentioned in Eenadu. Your explanation is actually supporting my point. I also took Mallana Sagar as reference to estimate the land required to build reservoir of that capacity. I was not criticizing either of them. I was questioning the concept of direct linkage of Godavari - Penna i.e bypassing Krishna through aqueduct.
Yes, I agree with you on what you said about pattiseema/prakasam barrage.