The invention discloses a riverway intersection
water flow stagnant area wedge cone. According to a building method of the cone, under the main and
branch water flow incoming representative flow condition, SMS numerical value
simulation software is utilized for calculating a two-dimensional flow velocity field of a main and
branch water flow intersection area under the natural
terrain condition, flow velocity contour maps at the different
water level elevation positions are extracted, contour lines equal to the
sediment incipient motion critical flow velocity Uc in the different
water level elevation flow velocity contour lines are determined through the
sediment incipient motion critical flow velocity Uc, and the contour lines are overlapped to form a wedge cone structure; a connection line of flow velocity
contour line intersection points with the main and
branch water flow velocity equal to the Uc in the lowest
water level process and shoreline intersection points is defined as a y axis, section
subdivision is carried out on the stagnant area along the y axis, water levels of the contour lines on the section are extracted to be fitted, the section water levels meet a parabolic equation that z is equal to a ax<2>+bx+c,
section modulus a, b and c build a relation with the y axis, and the structural
terrain elevation of the wedge cone is obtained. The wedge cone can effectively reduce the jacking effect of the intersection area, the water flow in the intersection area is uniform, and the wedge cone is suitable for the flow rectification
engineering of the intersected riverway water flow stagnant area