Tidal Characteristic Numbers of Water Level - Revision history

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2022-10-21T09:12:35Z

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← Older revision		Revision as of 09:12, 21 October 2022
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	[[category:Tidal Characteristic Numbers]]		[[category:Tidal Characteristic Numbers]]
	[[de:Tidekennwerte des Wasserstandes]]		[[de:Tidekennwerte des Wasserstandes]]
	[http://www.baw.de/downloads/wasserbau/mathematische_verfahren/pre_postpr/pdf/tdkw-de1.pdf Graphical representation] of characteristic numbers of water level (with German text only). This graphical representation is also available in [http://www.baw.de/downloads/wasserbau/mathematische_verfahren/pre_postpr/eps/tdkw-de2.eps Encapsulated PostScript format].		[http://www.baw.de/downloads/wasserbau/mathematische_verfahren/pre_postpr/pdf/tdkw-de1.pdf Graphical representation] of characteristic numbers of [[water level]] (with German text only). This graphical representation is also available in [http://www.baw.de/downloads/wasserbau/mathematische_verfahren/pre_postpr/eps/tdkw-de2.eps Encapsulated PostScript format].
	==Motivation==		==Motivation==
	The calculation and graphic display of the tidal characteristic numbers of water level contributes to a large amount for an improved understanding of the tide induced dynamic processes in coastal seas and estuaries.		The calculation and graphic display of the tidal characteristic numbers of [[water level]] contributes to a large amount for an improved understanding of the tide induced dynamic processes in coastal seas and estuaries.

	* Calculating high water, low water as well as flood tide rise, ebb tide fall and tidal range highlight the potential and kinetic energy which is related to the tidal wave. These quantities are spatially varying in dependence on the ratio between dissipative processes (e.g. bottom friction) and (re-) enforcing ones (namely resonance in shallow channels or concentration of energy due to a converging coastline and bathymetry).		* Calculating high water, low water as well as [[flood]] tide rise, ebb tide fall and tidal range highlight the potential and kinetic energy which is related to the tidal wave. These quantities are spatially varying in dependence on the ratio between dissipative processes (e.g. bottom friction) and (re-) enforcing ones (namely resonance in shallow channels or concentration of energy due to a converging coastline and bathymetry).
	* The mean tidal level does vary moderately compared to the the above mentioned quantities. Anyway, there exists a clear relationship to the fresh water inflow, the wind induced setup or nonlinear interactions of the tidal harmonic constituents.		* The mean tidal level does vary moderately compared to the the above mentioned quantities. Anyway, there exists a clear relationship to the fresh water inflow, the wind induced setup or nonlinear interactions of the tidal harmonic constituents.
	* Differences between mean flood water level and mean ebb water level give us some first information concerning asymmetry of the tidal wave, which is e.g. caused by the different shape of the tide during tidal rise and tidal fall.		* Differences between mean [[flood]] [[water level]] and mean ebb [[water level]] give us some first information concerning asymmetry of the tidal wave, which is e.g. caused by the different shape of the tide during tidal rise and tidal fall.
	* The spatial variations of the high water time or the low water time gives a good impression of the speed of propagation of the crest and trough of a tidal wave within a study area. If the lines of equal time of high and/or low water are separated by large distances this indicates an apparently fast propagating wave, normally related to strong reflexion of the tide at boundaries. This speed of propagation should not be confused with the celerity of the tidal wave, which can be significantly smaller.		* The spatial variations of the high water time or the low water time gives a good impression of the speed of propagation of the crest and trough of a tidal wave within a study area. If the lines of equal time of high and/or low water are separated by large distances this indicates an apparently fast propagating wave, normally related to strong reflexion of the tide at boundaries. This speed of propagation should not be confused with the celerity of the tidal wave, which can be significantly smaller.
	* Flood period, ebb period and tide period, as well as the various relationships between these numbers give some information about the asymmetry of the tidal wave, which are reflected in the different periods for the rise and fall of the water level elevation. Asymmetries which are already visible in the tidal wave have a good chance to become much more pronounced in current velocity asymmetries; the latter ones result in e.g. tide induced suspended sediment transport processes.		* [[Flood]] period, ebb period and tide period, as well as the various relationships between these numbers give some information about the asymmetry of the tidal wave, which are reflected in the different periods for the rise and fall of the [[water level]] elevation. Asymmetries which are already visible in the tidal wave have a good chance to become much more pronounced in current velocity asymmetries; the latter ones result in e.g. tide induced suspended [[sediment transport]] processes.
	* Exact knowledge of the inundation period can be relevant to ecologists or hikers crossing tidal flats (from the coastline to a dry sandbank). Also for improved navigation - professional or for leisure - this is a really relevant information.		* Exact knowledge of the inundation period can be relevant to ecologists or hikers crossing tidal flats (from the coastline to a dry sandbank). Also for improved [[navigation]] - professional or for leisure - this is a really relevant information.
	'''An automatic analysis of all tidal characteristic numbers of water level is carried through by the computer programs [[TDKWF]]''' and [[NCANALYSE]].		'''An automatic analysis of all tidal characteristic numbers of [[water level]] is carried through by the computer programs [[TDKWF]]''' and [[NCANALYSE]].

	==Definition of the Tidal Characteristic Numbers of Water Level==		==Definition of the Tidal Characteristic Numbers of Water Level==
	===High Water Level (HW)===		===High Water Level (HW)===
	Highest water level between two subsequent low waters.<br />		Highest [[water level]] between two subsequent low [[waters]].<br />
	[[Example figures: High water]].<br />		[[Example figures: High water]].<br />
	Data analysis: [[TDKWF]] and [[NCANALYSE]].		Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Low Water Level (LW)===		===Low Water Level (LW)===
	Lowest water level between two subsequent high waters.<br />		Lowest [[water level]] between two subsequent high [[waters]].<br />
	[[Example figures: Low water]].<br />		[[Example figures: Low water]].<br />
	Data analysis: [[TDKWF]] and [[NCANALYSE]].		Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Tidal Range===		===Tidal Range===
	Mean water level difference between high water and two neighbouring low waters.<br />		Mean [[water level]] difference between high water and two neighbouring low [[waters]].<br />
	[[Example figures: Tidal range]].<br />		[[Example figures: Tidal range]].<br />
	Data analysis: [[TDKWF]] and [[NCANALYSE]].		Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Mean Tide Level===		===Mean Tide Level===
	Mean water level for a tidal cycle (between two subsequent low waters).<br />		Mean [[water level]] for a tidal cycle (between two subsequent low [[waters]]).<br />
	[[Example figures: Mean tide level]].<br />		[[Example figures: Mean tide level]].<br />
	Data analysis: [[TDKWF]] and [[NCANALYSE]].		Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Mean Flood Water Level===		===Mean Flood Water Level===
	Mean water level for the flood period (tide rise) of a tidal cycle. <br />		Mean [[water level]] for the [[flood]] period (tide rise) of a tidal cycle. <br />
	[[Example figures: Mean flood water level]].<br />		[[Example figures: Mean flood water level]].<br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].

	===Mean Ebb Water Level===		===Mean Ebb Water Level===
	Mean water level for the ebb period (tide fall) of a tidal cycle. <br />		Mean [[water level]] for the ebb period (tide fall) of a tidal cycle. <br />
	[[Example figures: Mean ebb water level]].<br />		[[Example figures: Mean ebb water level]].<br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].
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	===Flood Period : Ebb Period===		===Flood Period : Ebb Period===
	Ratio in flood period to ebb period.<br />		Ratio in [[flood]] period to ebb period.<br />
	[[Example figures: Flood period : ebb period]].<br />		[[Example figures: Flood period : ebb period]].<br />
	Data analysis: [[TDKWF]] and [[NCANALYSE]].		Data analysis: [[TDKWF]] and [[NCANALYSE]].
Line 65:		Line 65:

	===Flood Period : Tide Period ===		===Flood Period : Tide Period ===
	Ratio in flood period to tide period.<br />		Ratio in [[flood]] period to tide period.<br />
	[[Example figures: Flood period : tide period]].<br />		[[Example figures: Flood period : tide period]].<br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].
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	===Flood Tide Rise===		===Flood Tide Rise===
	Water level difference (rise) between the first LW and the HW of a tidal cycle.<br />		[[Water level]] difference (rise) between the first LW and the HW of a tidal cycle.<br />
	[[Example figures: Flood tide rise]].<br />		[[Example figures: Flood tide rise]].<br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].

	===Ebb Tide Fall===		===Ebb Tide Fall===
	Water level difference (fall) between the HW and the second LW of a tidal cycle.<br />		[[Water level]] difference (fall) between the HW and the second LW of a tidal cycle.<br />
	[[Example figures: Ebb tide fall]].<br />		[[Example figures: Ebb tide fall]].<br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].

imported>Lang Guenther: /* Definition of the Tidal Characteristic Numbers of Water Level */ reference to analysis programs added

2013-04-15T08:33:25Z

Definition of the Tidal Characteristic Numbers of Water Level: reference to analysis programs added

← Older revision		Revision as of 08:33, 15 April 2013
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	===High Water Level (HW)===		===High Water Level (HW)===
	Highest water level between two subsequent low waters.<br />		Highest water level between two subsequent low waters.<br />
	[[Example figures: High water]]		[[Example figures: High water]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Low Water Level (LW)===		===Low Water Level (LW)===
	Lowest water level between two subsequent high waters.<br />		Lowest water level between two subsequent high waters.<br />
	[[Example figures: Low water]]		[[Example figures: Low water]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Tidal Range===		===Tidal Range===
	Mean water level difference between high water and two neighbouring low waters.<br />		Mean water level difference between high water and two neighbouring low waters.<br />
	[[Example figures: Tidal range]]		[[Example figures: Tidal range]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Mean Tide Level===		===Mean Tide Level===
	Mean water level for a tidal cycle (between two subsequent low waters).<br />		Mean water level for a tidal cycle (between two subsequent low waters).<br />
	[[Example figures: Mean tide level]]		[[Example figures: Mean tide level]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Mean Flood Water Level===		===Mean Flood Water Level===
	Mean water level for the flood period (tide rise) of a tidal cycle. <br />		Mean water level for the flood period (tide rise) of a tidal cycle. <br />
	[[Example figures: Mean flood water level]]		[[Example figures: Mean flood water level]].<br />
			Data analysis: [[NCANALYSE]].

	===Mean Ebb Water Level===		===Mean Ebb Water Level===
	Mean water level for the ebb period (tide fall) of a tidal cycle. <br />		Mean water level for the ebb period (tide fall) of a tidal cycle. <br />
	[[Example figures: Mean ebb water level]]		[[Example figures: Mean ebb water level]].<br />
			Data analysis: [[NCANALYSE]].

	===Flood Period===		===Flood Period===
	Period from low water to the next high water.<br />		Period from low water to the next high water.<br />
	[[Example figures: Flood period]]		[[Example figures: Flood period]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Ebb Period===		===Ebb Period===
	Period from high water to the low high water.<br />		Period from high water to the low high water.<br />
	[[Example figures: Ebb period]]		[[Example figures: Ebb period]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Flood Period : Ebb Period===		===Flood Period : Ebb Period===
	Ratio in flood period to ebb period.<br />		Ratio in flood period to ebb period.<br />
	[[Example figures: Flood period : ebb period]]		[[Example figures: Flood period : ebb period]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Tide Period===		===Tide Period===
	Time span between two successive LW of a tidal cycle.<br />		Time span between two successive LW of a tidal cycle.<br />
	[[Example figures: Tide period]]		[[Example figures: Tide period]].<br />
			Data analysis: [[NCANALYSE]].

	===Flood Period : Tide Period ===		===Flood Period : Tide Period ===
	Ratio in flood period to tide period.<br />		Ratio in flood period to tide period.<br />
	[[Example figures: Flood period : tide period]]		[[Example figures: Flood period : tide period]].<br />
			Data analysis: [[NCANALYSE]].

	===Ebb Period : Tide Period ===		===Ebb Period : Tide Period ===
	Ratio in ebb period to tide period.<br />		Ratio in ebb period to tide period.<br />
	[[Example figures: Ebb period : tide period]]		[[Example figures: Ebb period : tide period]].<br />
			Data analysis: [[NCANALYSE]].

	===High Water Time (T_HW)===		===High Water Time (T_HW)===
	Official time of high water occurrence.<br />		Official time of high water occurrence.<br />
	[[Example figures: High water time]]		Data analysis: [[TDKWF]] and [[NCANALYSE]].
			[[Example figures: High water time]].<br />

	===Low Water Time (T_LW)===		===Low Water Time (T_LW)===
	Official time of low water occurrence.<br />		Official time of low water occurrence.<br />
	[[Example figures: Low water time]]		[[Example figures: Low water time]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	===Flood Tide Rise===		===Flood Tide Rise===
	Water level difference (rise) between the first LW and the HW of a tidal cycle.<br />		Water level difference (rise) between the first LW and the HW of a tidal cycle.<br />
	[[Example figures: Flood tide rise]]		[[Example figures: Flood tide rise]].<br />
			Data analysis: [[NCANALYSE]].

	===Ebb Tide Fall===		===Ebb Tide Fall===
	Water level difference (fall) between the HW and the second LW of a tidal cycle.<br />		Water level difference (fall) between the HW and the second LW of a tidal cycle.<br />
	[[Example figures: Ebb tide fall]]		[[Example figures: Ebb tide fall]].<br />
			Data analysis: [[NCANALYSE]].

	===Inundation Period===		===Inundation Period===
	Period of time within a tidal cycle, during which an area is covered by water.<br />		Period of time within a tidal cycle, during which an area is covered by water.<br />
	[[Example figures: Inundation period]]		[[Example figures: Inundation period]].<br />
			Data analysis: [[TDKWF]] and [[NCANALYSE]].

	----		----

imported>Lang Guenther: /* Motivation */ NCANALYSE added

2013-04-11T14:52:35Z

Motivation: NCANALYSE added

← Older revision		Revision as of 14:52, 11 April 2013
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	* Flood period, ebb period and tide period, as well as the various relationships between these numbers give some information about the asymmetry of the tidal wave, which are reflected in the different periods for the rise and fall of the water level elevation. Asymmetries which are already visible in the tidal wave have a good chance to become much more pronounced in current velocity asymmetries; the latter ones result in e.g. tide induced suspended sediment transport processes.		* Flood period, ebb period and tide period, as well as the various relationships between these numbers give some information about the asymmetry of the tidal wave, which are reflected in the different periods for the rise and fall of the water level elevation. Asymmetries which are already visible in the tidal wave have a good chance to become much more pronounced in current velocity asymmetries; the latter ones result in e.g. tide induced suspended sediment transport processes.
	* Exact knowledge of the inundation period can be relevant to ecologists or hikers crossing tidal flats (from the coastline to a dry sandbank). Also for improved navigation - professional or for leisure - this is a really relevant information.		* Exact knowledge of the inundation period can be relevant to ecologists or hikers crossing tidal flats (from the coastline to a dry sandbank). Also for improved navigation - professional or for leisure - this is a really relevant information.
	'''An automatic analysis of all tidal characteristic numbers of water level is carried through by the computer ~~program~~ [[TDKWF]]'''.		'''An automatic analysis of all tidal characteristic numbers of water level is carried through by the computer programs [[TDKWF]]''' and [[NCANALYSE]].

	==Definition of the Tidal Characteristic Numbers of Water Level==		==Definition of the Tidal Characteristic Numbers of Water Level==

imported>Spohr Susanne: Links zu alten Seiten mit Beispielgrafiken entfernt

2013-02-18T10:35:24Z

Links zu alten Seiten mit Beispielgrafiken entfernt

← Older revision		Revision as of 10:35, 18 February 2013
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	===High Water Level (HW)===		===High Water Level (HW)===
	Highest water level between two subsequent low waters.<br />		Highest water level between two subsequent low waters.<br />
	~~[[Example: High water in the Jadebusen]]<br />~~
	[[Example figures: High water]]		[[Example figures: High water]]

	===Low Water Level (LW)===		===Low Water Level (LW)===
	Lowest water level between two subsequent high waters.<br />		Lowest water level between two subsequent high waters.<br />
	~~[[Example: Low water in the Jadebusen]]<br />~~
	[[Example figures: Low water]]		[[Example figures: Low water]]

	===Tidal Range===		===Tidal Range===
	Mean water level difference between high water and two neighbouring low waters.<br />		Mean water level difference between high water and two neighbouring low waters.<br />
	~~[[Example: Tidal range in the Jadebusen]]<br />~~
	[[Example figures: Tidal range]]		[[Example figures: Tidal range]]

	===Mean Tide Level===		===Mean Tide Level===
	Mean water level for a tidal cycle (between two subsequent low waters).<br />		Mean water level for a tidal cycle (between two subsequent low waters).<br />
	~~[[Example: Mean tide level in the Jadebusen]]<br />~~
	[[Example figures: Mean tide level]]		[[Example figures: Mean tide level]]

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	===Flood Period===		===Flood Period===
	Period from low water to the next high water.<br />		Period from low water to the next high water.<br />
	~~[[Example: Flood period in the Jadebusen]]<br />~~
	[[Example figures: Flood period]]		[[Example figures: Flood period]]

	===Ebb Period===		===Ebb Period===
	Period from high water to the low high water.<br />		Period from high water to the low high water.<br />
	~~[[Example: Ebb period in the Jadebusen]]<br />~~
	[[Example figures: Ebb period]]		[[Example figures: Ebb period]]

	===Flood Period : Ebb Period===		===Flood Period : Ebb Period===
	Ratio in flood period to ebb period.<br />		Ratio in flood period to ebb period.<br />
	~~[[Example: Ratio of flood period to ebb period in the Jadebusen]]<br />~~
	[[Example figures: Flood period : ebb period]]		[[Example figures: Flood period : ebb period]]

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	===High Water Time (T_HW)===		===High Water Time (T_HW)===
	Official time of high water occurrence.<br />		Official time of high water occurrence.<br />
	~~[[Example: High water time in the Jadebusen]]<br />~~
	[[Example figures: High water time]]		[[Example figures: High water time]]

	===Low Water Time (T_LW)===		===Low Water Time (T_LW)===
	Official time of low water occurrence.<br />		Official time of low water occurrence.<br />
	~~[[Example: Low water time in the Jadebusen]]<br />~~
	[[Example figures: Low water time]]		[[Example figures: Low water time]]

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	===Inundation Period===		===Inundation Period===
	Period of time within a tidal cycle, during which an area is covered by water.<br />		Period of time within a tidal cycle, during which an area is covered by water.<br />
	~~[[Example: Inundation period in the Jadebusen]]<br />~~
	[[Example figures: Inundation period]]		[[Example figures: Inundation period]]

imported>Lang Guenther: /* Ebb Tide Fall */ text for definition of quantity added

2013-02-15T09:49:34Z

Ebb Tide Fall: text for definition of quantity added

← Older revision		Revision as of 09:49, 15 February 2013
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	===Ebb Tide Fall===		===Ebb Tide Fall===
	.<br />		Water level difference (fall) between the HW and the second LW of a tidal cycle.<br />
	[[Example figures: Ebb tide fall]]		[[Example figures: Ebb tide fall]]

imported>Lang Guenther: /* Flood Tide Rise */ text for definition of quantity added

2013-02-15T09:48:17Z

Flood Tide Rise: text for definition of quantity added

← Older revision		Revision as of 09:48, 15 February 2013
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	===Flood Tide Rise===		===Flood Tide Rise===
	.<br />		Water level difference (rise) between the first LW and the HW of a tidal cycle.<br />
	[[Example figures: Flood tide rise]]		[[Example figures: Flood tide rise]]

imported>Lang Guenther: /* Tide Period */ text for definition of quantity added

2013-02-15T09:41:37Z

Tide Period: text for definition of quantity added

← Older revision		Revision as of 09:41, 15 February 2013
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	===Tide Period===		===Tide Period===
	.<br />		Time span between two successive LW of a tidal cycle.<br />
	[[Example figures: Tide period]]		[[Example figures: Tide period]]

imported>Lang Guenther: /* Mean Ebb Water Level */ text for definition of quantity added

2013-02-15T09:37:56Z

Mean Ebb Water Level: text for definition of quantity added

← Older revision		Revision as of 09:37, 15 February 2013
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	===Mean Ebb Water Level===		===Mean Ebb Water Level===
	Mean water level for ~~...~~ .<br />		Mean water level for the ebb period (tide fall) of a tidal cycle. <br />
	[[Example figures: Mean ebb water level]]		[[Example figures: Mean ebb water level]]

imported>Lang Guenther: /* Mean Flood Water Level */ text for definition of quantity added

2013-02-15T09:37:05Z

Mean Flood Water Level: text for definition of quantity added

← Older revision		Revision as of 09:37, 15 February 2013
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	===Mean Flood Water Level===		===Mean Flood Water Level===
	Mean water level for ~~...~~ .<br />		Mean water level for the flood period (tide rise) of a tidal cycle. <br />
	[[Example figures: Mean flood water level]]		[[Example figures: Mean flood water level]]

imported>Lang Guenther: /* Motivation */ text modified and extended to reflect newly introduced tidal characteristc numbers

2013-02-15T09:30:07Z

Motivation: text modified and extended to reflect newly introduced tidal characteristc numbers

← Older revision		Revision as of 09:30, 15 February 2013
Line 5:		Line 5:
	The calculation and graphic display of the tidal characteristic numbers of water level contributes to a large amount for an improved understanding of the tide induced dynamic processes in coastal seas and estuaries.		The calculation and graphic display of the tidal characteristic numbers of water level contributes to a large amount for an improved understanding of the tide induced dynamic processes in coastal seas and estuaries.

	* Calculating high water, low water as well as ~~the~~ tidal range ~~highlights~~ the potential and kinetic energy which is related to the tidal wave. These ~~three~~ quantities are spatially varying in dependence on the ratio between dissipative processes (e.g. bottom friction) and (re-) enforcing ones (namely resonance in shallow channels or concentration of energy due to a converging coastline and bathymetry).		* Calculating high water, low water as well as flood tide rise, ebb tide fall and tidal range highlight the potential and kinetic energy which is related to the tidal wave. These quantities are spatially varying in dependence on the ratio between dissipative processes (e.g. bottom friction) and (re-) enforcing ones (namely resonance in shallow channels or concentration of energy due to a converging coastline and bathymetry).
	* The mean tidal level does vary moderately compared to the the above mentioned quantities. Anyway, there exists a clear relationship to the fresh water inflow, the wind induced setup or nonlinear interactions of the tidal harmonic constituents.		* The mean tidal level does vary moderately compared to the the above mentioned quantities. Anyway, there exists a clear relationship to the fresh water inflow, the wind induced setup or nonlinear interactions of the tidal harmonic constituents.
			* Differences between mean flood water level and mean ebb water level give us some first information concerning asymmetry of the tidal wave, which is e.g. caused by the different shape of the tide during tidal rise and tidal fall.
	* The spatial variations of the high water time or the low water time gives a good impression of the speed of propagation of the crest and trough of a tidal wave within a study area. If the lines of equal time of high and/or low water are separated by large distances this indicates an apparently fast propagating wave, normally related to strong reflexion of the tide at boundaries. This speed of propagation should not be confused with the celerity of the tidal wave, which can be significantly smaller.		* The spatial variations of the high water time or the low water time gives a good impression of the speed of propagation of the crest and trough of a tidal wave within a study area. If the lines of equal time of high and/or low water are separated by large distances this indicates an apparently fast propagating wave, normally related to strong reflexion of the tide at boundaries. This speed of propagation should not be confused with the celerity of the tidal wave, which can be significantly smaller.
	* Flood period and ~~ebb~~ period, as well as the ~~relationship~~ between these ~~two~~ numbers give some information about the asymmetry or the tidal wave, which are reflected in the different periods for the rise and fall of the water level elevation. Asymmetries which are already visible in the tidal wave have a good chance to become much more pronounced in current velocity asymmetries; the latter ones result in e.g. tide induced suspended sediment transport processes.		* Flood period, ebb period and tide period, as well as the various relationships between these numbers give some information about the asymmetry of the tidal wave, which are reflected in the different periods for the rise and fall of the water level elevation. Asymmetries which are already visible in the tidal wave have a good chance to become much more pronounced in current velocity asymmetries; the latter ones result in e.g. tide induced suspended sediment transport processes.
	* Exact knowledge of the inundation period can be relevant to ecologists or hikers crossing tidal flats (from the coastline to a dry sandbank). Also for improved navigation - professional or for leisure - this is a really relevant information.		* Exact knowledge of the inundation period can be relevant to ecologists or hikers crossing tidal flats (from the coastline to a dry sandbank). Also for improved navigation - professional or for leisure - this is a really relevant information.
	'''An automatic analysis of all tidal characteristic numbers of water level is carried through by the computer program [[TDKWF]]'''.		'''An automatic analysis of all tidal characteristic numbers of water level is carried through by the computer program [[TDKWF]]'''.