Dr. Purandare Pradeep
we are doing only a stock taking exercise in water budgeting and what we get is the question and where it goes is the answer. it takes care of surface water + ground water +other things also.
the second question is a site specific question and only here all the irrigation models fail. if you can embed the real condition then automatically everything will be taken care of. but the should be site specific and if properly integrated the model is likely to give the correct quantity. (Even the hydrological model of GIS and SWAT will not give the same value.)
the third part the participants can discuss in the forum and with the help of experts we can make this more lively and useful