| Category | 
                    Item Name | 
                    Item Title | 
                                        Item | 
                    More Info. | 
                                    
                                            
                                 | D. Physiographic Features | 
                                                     D0 Sketch map | 
                                Lake and surroundings | 
                    
nam23-15.gif
                            
                
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                                     D1 Geographical | 
                                Bathymetric map | 
                    
nam23-01.gif
                            
                
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                                 | E. Water Quality | 
                                                     E1 Transparency | 
                                Mean Secchi disc readings and ranges (1976-1977) | 
                    
nam23-04.gif
                            
                
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                                     E4 DO | 
                                Temperature and DO profiles (1976-1977) | 
                    
nam23-02.gif
                            
                
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                        Vertical variation of conductivity, oxygen concentration and temperature (1977, 1979, 1984, 1986) | 
                    
nam23-03.gif
                            
                
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                                     E6 Chlorophyll | 
                                Chlorophyll-a concentration and biovolume of Nodularia spumigena (1986) | 
                    
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                        Chlorophyll-a concentration and phytoplankton biovolume (1976-1977) | 
                    
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                        Mean limnetic euphotic zone chlorophyll-a concentrations (1976-1977) | 
                    
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                                     E7 Nitrogen | 
                                Distribution of ammonia and nitrate as N (1979) | 
                    
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                        Monthly variations in nitrate by depth (1976-1977) | 
                    
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                        Past trend of chlorophyll-a concentration (1974-1986) | 
                    
nam23-12.gif
                            
                
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                                     E8 Phosphorus | 
                                Differences between surface and bottom water in total inorganic nitrogen and total phosphorus (1977, 1979m 1984m 1986) | 
                    
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                        Distribution of total phosphate and soluble reactive phosphate as P (1979) | 
                    
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                        Monthly variations in orthophosphate by depth (1976-1977) | 
                    
nam23-11.gif
                            
                
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                                     E10 Past Trends | 
                                Past trends of calcium concentrations, aragonite saturation indices, lake surface elevations and calcium loads (1888-1985) | 
                    
nam23-14.gif
                            
                
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