hello all!

I need your  help to solve a question !

the attchement is a part ,whose material is concrete and it  is full of  water .

load: gravity (9.81 m/s2, -Y direction );uneven water presure which varies with depth;

restriction:the red ,green ,yellow face are fixed;

(note:concrete and water density are  2300kg/m3,1000kg/m3 respectively;

question:what is the Result Moment of the center  of the green face (N.M)?

concrete E=21000MPa,Nu=0.2)