GATE Civil Engineering (CE) 2016 Shift 2 Solved Paper

Profile of a weir on permeable foundation is shown in figure I and an elementary profile of upstream pile only case' according to Khosla's theory is shown in figure II. The uplift pressure heads at key points Q, R and S are 3.14 m, 2.75 m and 0 m, respectively (refer figure II).


What is the uplift pressure head at point P downstream of the weir (junction of floor and pile as shown in the figure I)?