The Tonle Sap Great Lake is connected to the Mekong River by the 100-kilometer long Tonle Sap River, which reverses its flow seasonally

	20% of the Mekong River's floodwaters are absorbed by the Tonle Sap
	62% of the Tonle Sap's water originates from the Mekong River
	38% of the Tonle Sap's water originates from the Tonle Sap watershed
	The Tonle Sap River flowing into the lake causes the lake’s surface to expand from 2,500 km² to 16,000 km²
	Fish caught from the Tonle Sap Lake provide 40-70% of the protein intake of Cambodia's population