Case study:Restoration of the River Paha-Paasonjoki - Revision history

Kasvio at 10:44, 19 December 2013

2013-12-19T10:44:07Z

← Older revision		Revision as of 10:44, 19 December 2013
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	\|Project picture=Paha-Paasojoki after.JPG		\|Project picture=Paha-Paasojoki after.JPG
	\|Picture description=The river Paha-Paasonjoki after the restoration (photo J. Huhtala)		\|Picture description=The river Paha-Paasonjoki after the restoration (photo J. Huhtala)
	\|Project summary=The River Paha-Paasonjoki is 2 020 meters long and it flows though forest areas from the Lake Paha-Paasonjärvi to the river Paasonjoki~~. The catchment area is 97,92 km2~~. The river bed is mainly sand and contains rocks and gravel. A big part of the river is marked as nature conservation area. The water quality in the river is good or very good.		\|Project summary=The River Paha-Paasonjoki is 2 020 meters long and it flows though forest areas from the Lake Paha-Paasonjärvi to the river Paasonjoki. The river bed is mainly sand and contains rocks and gravel. A big part of the river is marked as nature conservation area. The water quality in the river is good or very good.

	The Centre for Economic Development, Transport and the Environment for Lapland restored three sections in the River. The restoration was made to improve the living conditions of the fish and other species. Rocks and gravel was placed to the river to make rapid areas more suitable for the trouts to reproduce. The aim of the retoration was to improve the living conditions of migratory fish and to make the river more nature-like and closer to its natural state. Trouts, grayling and macro invertebrates will benefit from the restoration and not only in the river but also in the nearby lakes. The rivers in the area are straightened for log floating since 1900 century. Also the natural state in the rivers are altered because of intense forestry and bog drainage.		The Centre for Economic Development, Transport and the Environment for Lapland restored three sections in the River. The restoration was made to improve the living conditions of the fish and other species. Rocks and gravel was placed to the river to make rapid areas more suitable for the trouts to reproduce. The aim of the retoration was to improve the living conditions of migratory fish and to make the river more nature-like and closer to its natural state. Trouts, grayling and macro invertebrates will benefit from the restoration and not only in the river but also in the nearby lakes. The rivers in the area are straightened for log floating since 1900 century. Also the natural state in the rivers are altered because of intense forestry and bog drainage.
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	The restoration plan aimed to slow down the current and produce suitable nesting habitats for the trouts and shelter places for the juveniles. Also versatility to the river bed was improved by digging few wider areas. Gravel was brought approximately 40 m3 and placed to the river in several places bed to ensure the nesting habitats for the migratory fish. Before the restoration many stones were taken away from from the river and places a side of the river. All the stones that were piled up next to the river were used in the restoration work. Also wooden material was used to give more habiitats for invertebrates and versatility to the river flow.		The restoration plan aimed to slow down the current and produce suitable nesting habitats for the trouts and shelter places for the juveniles. Also versatility to the river bed was improved by digging few wider areas. Gravel was brought approximately 40 m3 and placed to the river in several places bed to ensure the nesting habitats for the migratory fish. Before the restoration many stones were taken away from from the river and places a side of the river. All the stones that were piled up next to the river were used in the restoration work. Also wooden material was used to give more habiitats for invertebrates and versatility to the river flow.

	The lenght of the first restored area is 260 meters and the width is 3,5 in average and the total area of the restoration is 1 000 m2. There are a lot of moss and algae growth because of eutrofication and nutirens coming from the forestry ares above the area. The nesting gravel is partly covered up with sand and sediment. The second was 640 meters long, width 4 meters and the area in total was 2 560 ~~m2. The restored rapid area in the totally was 1900~~ m2. The thirds section was 460 meters, width 4 meters and the area was 2 000 m2.		The lenght of the first restored area is 260 meters and the width is 3,5 in average and the total area of the restoration is 1 000 m2. There are a lot of moss and algae growth because of eutrofication and nutirens coming from the forestry ares above the area. The nesting gravel is partly covered up with sand and sediment. The second was 640 meters long, width 4 meters and the area in total was 2 560 m2. The thirds section was 460 meters, width 4 meters and the area was 2 000 m2.
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Kasvio at 09:05, 19 December 2013

2013-12-19T09:05:10Z

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	{{Case study status		{{Case study status
	\|Approval status=~~Draft~~		\|Approval status=Approved
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Kasvio at 09:04, 19 December 2013

2013-12-19T09:04:54Z

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	\|Works completed=2012/12/29		\|Works completed=2012/12/29
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	{{Motivations}}		{{Motivations
			\|Hydromorphological quality elements=Flow velocities, Channel pattern/planform,
			\|Biological quality elements=Fish, Invertebrates,
			}}
	{{Measures}}		{{Measures}}
	{{Hydromorphological quality elements header}}		{{Hydromorphological quality elements header}}

Kasvio at 09:04, 19 December 2013

2013-12-19T09:04:05Z

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	\|Average channel gradient category=0.01 - 0.1		\|Average channel gradient category=0.01 - 0.1
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	{{Project background}}		{{Project background
			\|Reach length directly affected=1 280
			\|Project started=2011/03/04
			\|Works completed=2012/12/29
			}}
	{{Motivations}}		{{Motivations}}
	{{Measures}}		{{Measures}}

Kasvio at 09:02, 19 December 2013

2013-12-19T09:02:53Z

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			\|Heavily modified water body=No
			\|Protected species present=Yes
			\|Invasive species present=Yes
			\|Species=Brown trout (Salmo trutta), brook trout, grayling (Thymallus thymallus),
			\|Average bankfull channel width category=2 - 5 m
			\|Average channel gradient category=0.01 - 0.1
			}}
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	{{Motivations}}		{{Motivations}}

Kasvio at 09:01, 19 December 2013

2013-12-19T09:01:57Z

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			\|File name=Paha-Paasojoki before.JPG
			\|Caption=The River Paha-Paasonjoki before the restoration (photo Huhtala)
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Kasvio at 09:01, 19 December 2013

2013-12-19T09:01:12Z

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	The restoration plan aimed to slow down the current and produce suitable nesting habitats for the trouts and shelter places for the juveniles. Also versatility to the river bed was improved by digging few wider areas. Gravel was brought approximately 40 m3 and placed to the river in several places bed to ensure the nesting habitats for the migratory fish. Before the restoration many stones were taken away from from the river and places a side of the river. All the stones that were piled up next to the river were used in the restoration work. Also wooden material was used to give more habiitats for invertebrates and versatility to the river flow.		The restoration plan aimed to slow down the current and produce suitable nesting habitats for the trouts and shelter places for the juveniles. Also versatility to the river bed was improved by digging few wider areas. Gravel was brought approximately 40 m3 and placed to the river in several places bed to ensure the nesting habitats for the migratory fish. Before the restoration many stones were taken away from from the river and places a side of the river. All the stones that were piled up next to the river were used in the restoration work. Also wooden material was used to give more habiitats for invertebrates and versatility to the river flow.

	Also in the section three, the culvert was altered so that the erosion that was in the channel would be protected from further erosion. Also in the section four the river was made more curvy to reduce the erosion in the channel and to protect the sand from accumulating to the river bed.		The lenght of the first restored area is 260 meters and the width is 3,5 in average and the total area of the restoration is 1 000 m2. There are a lot of moss and algae growth because of eutrofication and nutirens coming from the forestry ares above the area. The nesting gravel is partly covered up with sand and sediment. The second was 640 meters long, width 4 meters and the area in total was 2 560 m2. The restored rapid area in the totally was 1900 m2. The thirds section was 460 meters, width 4 meters and the area was 2 000 m2.

	The lenght of the first restored area is 260 meters and the width is 3,5 in average and the total area of the restoration is 1 000 m2. There are a lot of moss and algae growth because of eutrofication and nutirens coming from the forestry ares above the area. The nesting gravel is partly covered up with sand and sediment. The second was 640 meters long, width 4 meters and the area in total was 2 560 m2. The restored rapid area in the totally was 1900 m2. The thirds section was 460 meters, width 4 meters and the area was 2 000 m2.
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Kasvio at 09:00, 19 December 2013

2013-12-19T09:00:38Z

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Kasvio: Created page with "{{Case study status |Approval status=Draft }} {{Location |Location=66.09879010912505, 27.42136001586914 }} {{Project overview |Project title=Restoration of the River Paha-Paas..."

2013-12-19T08:52:16Z

Created page with "{{Case study status |Approval status=Draft }} {{Location |Location=66.09879010912505, 27.42136001586914 }} {{Project overview |Project title=Restoration of the River Paha-Paas..."

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{{Case study status
|Approval status=Draft
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{{Location
|Location=66.09879010912505, 27.42136001586914
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{{Project overview
|Project title=Restoration of the River Paha-Paasonjoki
|Status=Complete
|Themes=Fisheries, Habitat and biodiversity, Hydromorphology
|Country=Finland
|Main contact forename=Jarmo
|Main contact surname=Huhtala
|Main contact id=Kasvio
|Contact organisation=Centre for Economic Development, Transport and the Environment for Lapland
|Multi-site=No
}}
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