[{SlideShowNav}] !!!Boats on Tonle Sap [{Image src='350cb.jpg' width='800' height='656' alt='Boats on Tonle Sap' class='image_left'}] [{SET customtitle='Boats on Tonle Sap'}] Boats on Tonle Sap, Cambodias huge freshwater lake. During the dry season from November to May, the lake is fairly shallow - only about one meter deep - allowing boats to be poled. During the monsoon season, waters from the flooding Mekong River back up raising the lake depth to about nine meters. This annual pulsing over a large floodplain brings in high sediment and nutrient fluxes allowing for rich aquatic diversity. Tonle Sap is one of the most productive inland fisheries in the world.