A Manual of Lake Morphometry
(Sprache: Englisch)
In this context morphology means the study of lake fonns and fonn elements, their genesis (from geographical and geological viewpoints) and their role in a broad physical lirnnological perspective. Lake morphometry deals with the quantification and...
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Klappentext zu „A Manual of Lake Morphometry “
In this context morphology means the study of lake fonns and fonn elements, their genesis (from geographical and geological viewpoints) and their role in a broad physical lirnnological perspective. Lake morphometry deals with the quantification and measurement of these forms and fonn elements. MOrphometric data are of fundamental importance in most limnological and hydrological projects. This is obvious to most scientists in the field, but it is just as evident that lake morphology and lake morphometry are compara tively neglected topics of scientific endeavour. One can take the classical work of Welch - "Limnological methods" - as an example. This book was pub lished in 1948 and it is still used as the main reference (see e. g. Wetzel, 1975), in spite of the fact that the source of most morphometric data, the bathymetric map, today is practically always constructed from hydrographic surveys conducted with echosounding equipment, a technique that became widely used and accepted only after 1948. Echosounding is not even mentioned in Welch~s book. One can also point out that all scale-dependent morphometric parameters, like the shoreline length, the shore development and the lake bottom roughness, up till quite recently, have had limited quantitative re levance, since these parameters could not be defined unambiguously.
Inhaltsverzeichnis zu „A Manual of Lake Morphometry “
1. Introduction.- 2. Echosoundings.- 2.1. Introduction.- 2.2. Instrumentation.- 2.3. Preparations.- Working map.- Sounding tracks.- Pilot survey.- Calibration.- 2.4. Field-work.- 3. Bathymetric Map Construction.- 4. Morphometry.- 4.1. Optimization of lake hydrography surveys -the information value of bathymetric maps.- 4.2. The intensity of the survey.- 4.3. Practical use of the optimization model-manuals.- 4.3.1. Manual -unknown lake.- 4.3.2. Manual -already echosounded lake.- 4.4. Morphometrical parameters.- Maximum length.- Maximum effective length.- Effective length.- Effective fetch.- Maximum width.- Maximum effective width.- Mean width.- Maximum depth.- Mean depth.- Median depth.- Quartile depths.- Relative depth.- Direction of major axis.- Shoreline length.- Contour-line length.- Total lake area.- Lake area.- Volume.- Slope.- Mean slope.- Median slope ..- Shore development.- Lake bottom roughness.- Form roughness.- Volume development.- Islands, islets and rocks.- Insulosity.- Profiles.- The slope curve.- The hypsographic curve.- The percentage hypsographic curve.- The relative hypsographic curve.- The volume curve.- The percentage volume curve.- The relative volume curve.- The lake form.- The lake type.- 5. Acknowledgements.- 6. Appendix.- 7. References.
Bibliographische Angaben
- Autor: L. Hakanson
- 1981, 80 Seiten, Maße: 24,4 cm, Kartoniert (TB), Englisch
- Verlag: Springer
- ISBN-10: 3540104801
- ISBN-13: 9783540104803
Sprache:
Englisch
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