MI1 Mire drainage status
National Forest inventory (NFI) is a monitoring scheme which produces information on forests and forest resources. Data are based on field measurements as well as remote sensing and other sources. Sampled plots are located in clusters and form a regular network over the whole country.
On recently drained mires draining has not yet affected the ground vegetation or the growth of trees. Mires with clogged-up drains. to which the original hydrology is slowly returning. are also classified as recently drained mires.
On transforming mires drainage has increased the growth of trees. but ground vegetation still consists mainly of mire vegetation.
On transformed mires ground vegetation consists of upland vegetation and the growth of trees is no longer limited by the excess of water.
A) Southern Finland
Undrained |
Recently drained |
Transforming & transformed |
Total mire area (1000 ha) |
|
| NFI3 (1951–1953) | 82.3% |
4.4% |
13.3% |
3 846 |
| NFI5 (1964–1968) | 52.6% |
23.0% |
24.4% |
3 958 |
| NFI6 (1971–1974) | 36.1% |
25.1% |
38.8% |
3 630 |
| NFI7 (1977–1982) | 29.3% |
15.5% |
55.2% |
3 448 |
| NFI8 (1986–1992) | 25.1% |
12.4% |
62.5% |
3 437 |
| NFI9 (1996–2000) | 21.9% |
4.4% |
73.7% |
3 219 |
| NFI10 (2004–2008) | 23.2% |
2.4% |
74.4% |
3 093 |
| NFI11 (2009–2013) | 23.1% |
2.1% |
74,9% |
2 939 |
B) Pohjois-Suomi
Undrained |
Recently drained |
Transforming & transformed |
Total mire area (1000 ha) |
|
| NFI3 (1951–1953) | 96.1% |
1.6% |
2.3% |
5 896 |
| NFI5 (1969–1970) | 78.8% |
16.0% |
5.2% |
5 821 |
| NFI6 (1975–1976) | 69.3% |
16.0% |
14.7% |
5 707 |
| NFI7 (1982–1984) | 63.5% |
12.3% |
24.1% |
5 571 |
| NFI8 (1992–1994) | 61.5% |
8.1% |
30.4% |
5 475 |
| NFI9 (2001–2004) | 58.7% |
2.2% |
39.2% |
5 843 |
| NFI10 (2005–2008) | 58.9% |
2.9% |
38.1% |
5 806 |
| NFI11 (2009–2013) | 59.1% |
2.2% |
39,2% |
5 821 |
Download data on a sreadsheet from here
Links:
Forest infromation services by Natural Resources Institute Finland
References:
Peltola, A. (ed.) 2013. Statistical Yearbook of Forestry 2013. SVT Agriculture. forestry and fishery. Finnish Forest Research Institute. Helsinki.
Hökkä, H., Kaunisto, S., Korhonen, K. T., Päivänen, J., Reinikainen, A. and Tomppo, E. 2002. Suomen suometsät 1951–1994 [Finnish mire forests 1951–1994]. Metsätieteen aikakauskirja 2B/2002: 201–357.