a

b

c

d

e

f

g

h

i

j

k

l

m

n

o

p

q

r

s

t

u

v

w

x

y

z

mean lower low water

Definition

Frequently abbreviated to lower low water. The average height of all lower low waters recorded at a given place over a 19-year period or a computed equivalent period of time. For shorter periods of observations, corrections are applied to eliminate known variations and reduce the result to the equivalent of a mean 19-year value.

English Greek Portuguese Swedish