A 1:15 scale model will be used to study the circulation patterns in a rectangular detention pond. The pond has a bottom length of 40 m and a bottom width of 10 m. All sides of the pond have 3:1 (H:V) slopes. If the design depth is 5 m, what is the depth, surface area, and storage volume of the model? The storage volume expression is Vol = LWd + (L + W)zd2 + (4/3)z2d3, where L and W are the length and width of the bottom, d is the depth, and z is the side slope.