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The covering area of aquatic vegetation and its biomass in Taihu Lake, no containing Phragmites communi; Type one and Type two, respectively, are the floating vegetation-dominated hydrophyte, and the submerged vegetation-dominated hydrophyte.
| Date | Type one (km2) | Type two (km2) | Total area (km2) | Total biomass (thousand ton) |
|---|---|---|---|---|
| 15 June 2007 | 72.4 | 291.7 | 364.1 | 406 |
| 26 July 2004 | 89.1 | 393.1 | 482.2 | 528 |
| 13 July 2002 | 71.7 | 380.0 | 451.7 | 482 |
| 26 July 2001 | 75.8 | 378.8 | 454.6 | 489 |
