MI2 Ditch clearing

Ditch clearing refers to redigging ditches in previously drained mires. As a part of ditch clearing operations new ditches may be dug in adjacent areas and larger collecting channels can be opened even in pristine parts of the mire.

First-time draining refers to the draining of pristine mires.

 A) Annual ditch clearing and first-time draining

Year
First-time draining
Ditch clearing
1990
41 100
71 800
1991
36 300
63 600
1992
34 500
73 600
1993
25 800
79 700
1994
16 900
82 000
1995
15 300
78 700
1996
6 300
68 500
1997
7 800
81 300
1998
3 600
69 100
1999
3 400
81 400
2000
600
74 300
2001
0
82 700
2002
0
80 100
2003
0
67 500
2004
0
77 800
2005
0
68 800
2006
0
71 700
2007
0
67 100
2008
0
61 200
2009
0
68 800
2010
0
59 200
2011
0
58 400
2012
0
51 500
2013
0
55 000

 B) Cumulative ditch clearing and first-time draining area (hectares)

Year
First-time draining
Ditch clearing
   Year
First-time draining
Ditch clearing
1962
144 400
14 100
   1988
4 470 200
764 700
1963
302 900
27 500
   1989
4 522 700
821 100
1964
485 700
46 100
   1990
4 563 800
892 900
1965
695 600
65 100
   1991
4 600 100
956 500
1966
928 600
82 600
   1992
4 634 600
1 030 100
1967
1 203 100
113 500
   1993
4 660 400
1 109 800
1968
1 476 200
135 800
   1994
4 677 300
1 191 800
1969
1 770 300
164 100
   1995
4 692 600
1 270 500
1970
2 060 700
178 600
   1996
4 698 900
1 339 000
1971
2 305 700
206 200
   1997
4 706 700
1 420 300
1972
2 529 200
227 800
   1998
4 710 300
1 489 400
1973
2 745 300
247 300
   1999
4 713 700
1 570 800
1974
2 938 800
262 700
   2000
4 714 300
1 645 100
1975
3 137 700
283 500
   2001
4 714 300
1 727 800
1976
3 319 800
309 500
   2002
4 714 300
1 807 900
1977
3 481 900
349 100
   2003
4 714 300
1 875 400
1978
3 626 700
384 200
   2004
4 714 300
1 953 200
1979
3 743 800
419 900
   2005
4 714 300
2 022 000
1980
3 857 200
454 400
   2006
4 714 300
2 093 700
1981
3 957 000
485 000
   2007
4 714 300
2 160 800
1982
4 041 000
516 700
   2008
4 714 300
2 222 000
1983
4 125 600
547 400
   2009
4 714 300
2 290 800
1984
4 203 100
587 900
   2010
4 714 300
2 350 000
1985
4 273 100
635 200
   2011
4 714 300
2 408 400
1986
4 340 300
678 100
   2012
4 714 300
2 459 900
1987
4 400 800
724 900
   2013
4 714 300
2 514 900

 Downdoad data on a spreadsheet from here

 Links:

 MetINFO, Metsätilastollinen tietopalvelu (Metsäntutkimuslaitos)

References:

 Hökkä, H., Kaunisto, S., Korhonen, K. T., Päivänen, J., Reinikainen, A. ja Tomppo, E. 2002. Suomen suometsät 1951–1994.
 Metsätieteen aikakauskirja 2A/2002: 201–357.

 Peltola, A. (ed.) 2014. Finnish Statictical Yearbook of Forestry. SVT Maa- metsä ja kalatalous 2014. Finnish Forest Research Institute.