The author intended to induce a simple and applicable discharge equation for the submerged V-notch weir. As the results of the experimental investigations, the following conclusions are summarized ;
1 It is possible to estimate the discharge volume with use of Eqs. 5 and 6. Applicability of the induced equations can cover the considerably wide range of H_d/H_u.
2 An approximate discharge volume can be regarded as equal to the discharge volume for free flow within H_d/H_u = 0.35.
Many interesting problems, such as the more theoretical anlysis of the critical value of H_d/H_u and the value of K are still suspended out of the examination in this paper.