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.