Lake Days 2021:
- Open bog reconstruction, 13.8.2021, Käpylamminneva, Saarijärvi
- Seminar day, 14.8.2021
- Fish Ladders, 15.8.2021, https://youtu.be/jbzLo7PtbX0
(Program in Finnish: https://www.jarvipaivat.fi/tapahtuma/jarvipaivat-2021/ )
Friday 13.8.2021
Thank you for the materials Esa Hakkarainen (the owner of the Käpylamminneva). Below, on the left, is the original open bog called Käpylamminneva (image 1). The part "neva" in the name informs type of the nature. Black grouses were common on the area. After drainage white birches appeared near ditches, but the landscape has kept its features. Vegetation is still pine bog, there are dwarf shrubs and bog moss. On the edges there are less peat and it´s heath land from those areas. The wettest places are open bog or treeless bog. Before execution detailed planning was made.
Image 1. Images and contents made by Kalle Laitinen. Image left, Käpylamminneva in 1964 and image on the right is from nowadays. (img: Kalle Laitinen)
Field surveying
Basic survey on the area was made by Äänekartta and based on their laser scanning. Altitudes used were 20 cm, 1 m and 5 m. The best results were from the altitude contour of 1 m. It gives the best accuracy. The image gives the information needed to observe the direction of movement of the water (Image 2).
Image 2. Laser scanning image. (img: Kalle Laitinens)
Some of the old ditches were already blocked up by time. The ditches were dug straight into the pond. Those were dugged up and channeled in new place, in to the bog (image 1 and image 3). Now the pond gets its water only from the spring it has and the water color has become brighter by time.
Image 3. Look at also the image 1, here below the red line is informing the new channel for the ditch. Waters from the forestry above is now lead in to the open bog. (img: Kalle Laitinen)
More ditches to block up
Basically the work for us volunteers wast to block up three ditches (image 4). The other group took slashers and cleared out the landscape to get more open space, open bog like.
Image 4. Blocking up ditches and opening the landscape. We had trenching hoes and shovels. The birches were cut down, put in the ditch and then we made peat banks on top of them. In time there will grow sphagnum moss layer on top of it. (img: Kati Ahonen)
Saturday 14.8.2021, wisdom from the elders
... I have been thinking about how should I take a stand on issues like peat production and the peatlands in forestry? There is a heavy focus in ditching when we are talking about surface draining (use of the land). There are ditches every where and they all end-up (in most of the cases) in the streams and rivers, lakes and ponds.
In this weekend I felt "the wisdom from the older". The association of "Pelastetaan reittivedet ry" (Let´s save the waterways association) has been fighting for years against peat production. People living by the rivers and lakes have been telling about the peat contamination in the waters for years, but they have not been heard (links in the end, some research and studies). But recently the Regional council of Central Finland authorized the association to represent and act on the behalf of cleaner waters: they heard.
In Saturday Olavi Niemi Spoked well. The representative from the Finnish Forest Centre asked if the association is going to "speak against them", because of the peatlands in forestry. Olavi's point of view was excellent. First he thanked for asking and was pleased to hear the concern so he could answer. And the wisdom lies in his answer: "Do not worry, that will never happen and the reason is that you admit the problems and you are studying and working on it - you are doing something, you are working with the problem... But the peat industry has never admitted issues in here Central Finland or they are diminishing the problem."
That was a very good point.
In the world 2021 - there is no room forbidding problems and issues and all the issues we have... Thinking it´s cheaper to misuse nature is a wicked one.
Pelastetaan Reittivedet ry is now making a research for returning the smolts and trouts to the Saarijärvi waterway. Jami Aho kept a really good lecture about the research he had made in the filed studies. There is lot to do, because we have cleaned up too well all the streams and rivers we have... Without understanding how the trouts are behaving and breeding and where they are breeding. Jami's work is not yet completed. We will know more somewhere in the future...
... About the studies I mentioned above, here they are...
Studies have been made by research workers by University of Jyväskylä and the CORE group. Studies are only in Finnish made by docent Sakari Möttönen, Miikka Salo and Esa Konttinen:
In Saturday Sakari Möttönen kept a good presentation about the history of the Pelastetaan Reittivedet ry.
The studies are handling the trust issues between the authorities and the citizens. These studies are interesting for me because I were in totally different area, but the stories were the same or the same style. It´s like a collective memory and experiences people have, about their waters.
For example: living for 50 years by the same lake, watching it from day to day, from week to week, month to month and year to year. And the authorities do not believe the people telling the water color of the lake have changed because of the humus on it (image 5).
Image 5. Fisherman and his nets. Humus colored water in the buckets. Fishermans are using the same places from year to year, they notice things like visibility depth changes and slime building-up on their nets. Bucket above visibility depth 87 cm, pH 5,5 - Reinikankoski, Pihlajaveden reitti. Bucket below visibility depth 72 cm, pH 5,6 - Petäjäveden Jämsänvesi (Source: Pelastetaan reittivedet facebook-sivu).
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