mean diurnal high-water inequality

Half the average difference between the heights of the two high waters of each tidal day over a 19-year period; it is obtained by subtracting the mean of all high waters from the mean of the higher high waters.

Related terms:

• mean diurnal low-water inequality
• tropic high-water inequality
• high-water inequality
• diurnal inequality
• tropic low-water inequality
• mean higher high water
• mean high water
• low-water inequality
• age of diurnal inequality
• mean high-water neaps