mean diurnal low-water inequality

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

Related terms:

• mean diurnal high-water inequality
• tropic low-water inequality
• low-water inequality
• diurnal inequality
• tropic high-water inequality
• mean lower low water
• mean low water
• high-water inequality
• mean low-water springs
• Indian spring low water