Organic Waste Recycling

314 Organic waste recycling: technology and management

Figure 7.3 Emergent aquatic weeds, cattail

Figure 7.4 A diagrammatic representation of a lake showing zonation of aquatic weeds,
the photic zone, and thermal stratification (adapted from Mitchell 1974; ©UNESCO
1974; reproduced by permission of UNESCO)

Zonation

Emergent

weeds

Zonation of

aquatic

macrophytes

Floating

leaves and

free floating

weeds

Submerged

weeds

Temperature

depth curves

Limit of photic zone

Epilimnion

Mesolimnion

Hypolimnion

Thermocline

Winte

r

Summe

r