Down the centre of the valley flows the Luangwa River, fed by dozens of sand rivers that come down during the rainy season. The Luangwa carves a tortuous course along the floor and when in flood rapidly erodes the outer bends, depositing silt within the loops. Eventually the river cuts a new course, leaving the old course to silt up, forming ‘ox bow’ lagoons...
...These lagoons are very important to the ecology of the riverine zone and account for the high carrying capacity of the area.