A VERIFICATION OF 2 SHEAR VELOCITY EQUATIONS FOR THE WIND-WAVE INTERACTION IN A LAKE ENVIRONMENT

Under growing wind-wave conditions the shear velocity, u, over the wa ter surface equals g(2)H(2)s/(BaCp3)-C-2, where g is the gravitational acceleration, H-s, is the significant wave height, B-a is a constant, and C-p is the wave celerity. From an independent field experiment in a lake environment which provided all three parameters (u, H-s, and C-p). the value of B-a is found to be 0.89, which is slightly lower th an but consistent (within 20%) with the literature value between 0.90 and 1.06 obtained from an oceanic environment. Since this u equation does not include the wind speed. U-10, another u formulation with U-1 0 in addition to the wave information is also evaluated. It is shown t hat the latter equation which includes U-10 is superior to the former without U-10..