Great Bay Hydrology

Data on currents is provided by the University of New Hampshire Estuarine Flooding and Dewatering Simulation Model. Please visit UNH's hydrology website for a complete description of the model.

Tide Equation
The full equation used for calculating tides in the Great Bay Model is:

0.6096 * (-0.3+
0.140 * COS((15.041*TIME-075.1)*2*PI/360) +
0.065 * COS((30.082*TIME-304.3)*2*PI/360) +
0.041 * COS((29.528*TIME-298.9)*2*PI/360) +
1.468 * COS((28.984*TIME-270.7)*2*PI/360) +
0.100 * COS((57.968*TIME-016.6)*2*PI/360) +
0.164 * COS((86.952*TIME-003.7)*2*PI/360) +
0.320 * COS((28.439*TIME-227.7)*2*PI/360) +
0.043 * COS((27.895*TIME-199.7)*2*PI/360) +
0.047 * COS((13.943*TIME-051.2)*2*PI/360) +
0.047 * COS((14.958*TIME-070.7)*2*PI/360) +
0.239 * COS((30.000*TIME-310.6)*2*PI/360) +
0.014 * COS((29.958*TIME-283.1)*2*PI/360) +
0.062 * COS((28.512*TIME-234.5)*2*PI/360))