32 | Berichte des BSH Nr. 57 
3.3 
Deduction 
of the tidal 
parameters 
The calculation rules of the individual tidal parameters from the coefficients ag, 
a; and bi are summarised in Table 1 and shown graphically in Figure 3 and 
Liqure 4. 
The spring tide period and spring tide lag can also be calculated from the analy- 
sis results. The spring tide period is the time when the semi-monthly inequality 
in high water height assumes its greatest positive value. The spring tide lag 
is the time difference between the occurrence ofthe full or new moon and the 
spring tide. Similarly, neap tide period is the time when the semi-monthly 
inequality assumes its greatest negative value, and the neap tide lag is the time 
difference between the occurrence of the first or last quarter of the moon and 
the neap time. 
Table 1: Tidal parameters 
Name 
KU 
Mean High Water Lunitidal Interval aHwı.0 
Mittleres Hochwasserintervalt 
Mean Low Water Lunitidal Interval MNWI aNwi.O 
Mittleres Niedrigwasserintervall 
Mean Tidal Period MTD 12h 25, 24min 
Mittlere Tidendauer 
Mean Duration of Rise MSD MTD —- MFD | 
Mittlere Steigdauer 
Mean Duration of Fall ' MFD ! MNWI- MHWI ' 
Mittlere Falldauer 
Mean Spring Tidal Period MSpTD 12h 21min 
Mittlere Springtidendauer 
Mean Spring Duration of Rise MSpSD | MSpTD —- MSpFD | 
Mittlere Springsteigdauer 
Mean Spring Duration of Fall MSpFD Ya Ta) — Ya Ta) 
Mittlere Springfalldauer 
Mean Neap Tidal Period MNpTD 12h 31min 
Mittlere Nipptidendauer 
Mean Neap Duration of Rise MNpSD | MNpTD — MNpFD | 
Mittlere Nippsteigdauer 
Mean Neap Duration of Fall MNpFD ' yawıl(TR) — YawılT2) ' 
Vittlere Ninpfalldauer 
Mean Spring High Water Interval MSpHWI ' Yuwm( TI) 
Mittleres Springhochwasserintervall 
Mean Spring Low Water Interval " MSPDNWI ' Yam(T 
Mittleres Springniedrigwasserintervall 
Mean Neap High Water Interval MNDHWI * Yawı( To) 
MittHaras Mipgpohachwasserinteryalt 
MNDNWI Yuwi( To) 
MHWI 
Mean Neap Low Water Interval 
AMitHaras Minanniarlrnimuassarintftarvalt 
Öl 
8a 
b 
ıC