There are 25 krueng (river) streams which lead to Danau Laut Tawar with a total water discharge of approximately 10,043 liters per second.
Average lake depth:
Average lake watertemperature is measured by depth:
The highest brightness is 2.92 meters (in the middle of the lake), while the lowest is 1.29 meters (Kp. Kuala II). The higher the brightness, the clearer the water is.
**Flora **
Found 46 types of plankton which are divided into 11 classes in Lake Laut Tawar, with details of Chlorophyceae class of 35%, Bacillariophyceae 24 %, Myxophyceae 9% , and other classes by 32%. Hydrilla sp., Water hyacinth, and kiambang can also be found living on the edge of the lake.
Fauna
There were 3 types of mollusks, 1 type of annelida, 37 species of fish, and 49 types of insects that live in the Danau Laut Tawar area. For animals that live around the lake, 20 mammal species are divided into 13 families, some of which include protected animals, including binturung, pukas, pangolin, porcupine mouse deer, sweepers, gibbons, siamang, tanado, tigers, jungle cats, duck, deer, and deer.