Table 4 Frequency of de-weeding in flowing and standing waters in Germany
From: Biogas production from submerged macrophytes—a case study of regional biomass potentials in Germany
Type of water body | Total number of water bodies de-weeded | Number of water bodies de-weeded yearly | Number of water bodies not de-weeded yearly | Number of water bodies, frequency of de-weeding unknown |
|---|---|---|---|---|
Flowing water bodies | 172 | 144 | 19 | 9 |
Standing water bodies | 93 | 30 | 22 | 41 |