Case study:Herinrichting beekdal Tongelreep - Revision history

Bas Wullems at 13:03, 1 April 2021

2021-04-01T13:03:55Z

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	\|Contact organisation url=www.stowa.nl/contact		\|Contact organisation url=www.stowa.nl/contact
	\|Multi-site=No		\|Multi-site=No
	\|Project summary=De Tongelreep ~~komt vanuit België bij de~~ Achelse Kluis ~~Nederland binnen, waar de beek vervolgens bij~~ Eindhoven ~~de Dommel instroomt~~. De Tongelreep ~~maakt deel uit van stroomgebied De~~ Dommel. ~~Vanaf de jaren '90 van de vorige eeuw zijn er beekherstel maatregelen genomen om de beek meer te laten meanderen nadat deze~~ in ~~de vorige eeuw was rechtgetrokken voor een snellere water afvoer~~. ~~Hierdoor dreigen stukken bos~~, ~~natte heide en vennen te verdrogen~~.		\|Project summary=The Tongelreep enters the Netherlands at the Achelse Kluis and then flows into the river Dommel near Eindhoven. The Tongelreep is part of the Dommel catchment. Since the 1990s, stream restoration measures were taken to allow the river more space to meander after it had previously, in the past century, been straightened for a faster discharges. As a result of this straightening, parts of woodland, moors and wetlands were at risk of drying out. In addition to these traditional restoration measures, Building with Nature measure were implemented. The Tongelreep is the only Dutch stream where, for building with Nature purposes, gravel beds were introduced near Aalst in addition to dead wood patches. This was done to enrich the stream flora and fauna.
	~~Verdere werkzaamheden betreffen Bouwen met Natuur (BmN) maatregelen~~. De Tongelreep is ~~de enige beek~~ in ~~Nederland waar naast het aanbrengen van dood hout ook grind bedden zijn aangelegd als BmN maatregel ter hoogte van Aalst~~. ~~Dit is gedaan om de~~ flora en fauna ~~in en rond de beek te verrijken~~.		\|Monitoring surveys and results=Water depth, flow velocity and substrate cover were measured four times in 2016/2017. In addition, the position of the gravel beds was measured twice per year in the years 2015, 2016 and 2017. These measurements also revealed limited sedimentation, which was 80% gravel in late 2017. The gravel areas moved by on average 1.0m (+/- 0.3m), indicating that they mostly remained in place over a five year period. After the introduction of gravel beds, total species abundance and the number of species typical for an R5-type stream both increased significantly.
	\|Monitoring surveys and results=~~De diepte van het water~~, ~~stroomsnelheid en de substraat bedekking zijn~~ in 2016/2017 ~~in totaal vier keer gemeten~~. ~~Daarnaast is ook de positie van de grindbedden twee keer~~ per ~~jaar gemeten~~ in 2015, 2016 en 2017. ~~Deze metingen hebben laten zien dat er beperkte sedimentatie optrad en de sedimentatie aan het einde van 2017 voor~~ 80% ~~bestond uit grind~~. ~~Het oppervlakte had een gemiddelde verplaatsing van~~ 1.0 +/- 0.~~3 m~~, ~~wat aangeeft dat de grindgebieden~~ over ~~een periode van 5 jaar op hun plek in de beek zijn blijven liggen~~. ~~Na het aanbrengen van deze grindbedden was het totale soortenrijkdom en soorten kenmerkend voor een KRW~~-type ~~R5 significant hoger~~.

	~~Bron~~: http://edepot.wur.nl/468347		Source: http://edepot.wur.nl/468347
	\|Lessons learn=~~Deze metingen pleiten voor het stimuleren van het ontstaan van grindbedden~~, ~~waarbij het actief inbrengen van grind een technologische oplossing is~~. ~~Het~~ is ~~alleen wenselijk als er al van nature grind aanwezig~~ is ~~in de beek en heeft een aanpak waarbij gebruik wordt gemaakt van Bouwen met Natuur vaker de voorkeur~~.		\|Lessons learn=These measurements show the potential of stimulating the origination of gravel beds. Actively introducing gravel would be a technological approach, which may be undesirable. If gravel is already naturally present in the stream, extra gravel may be added, but otherwise, a Building with Nature approach is considered more desirable.

	~~Andere mogelijkheden om de stromingsvariatie te bevorderen is het gebruik van stroombaanmaaien of het inbrengen van dood hout~~. ~~Wanneer er sprake~~ is ~~van een ruimtegebrek voor deze natuurlijke maatregelen~~ (~~zoals bij de~~ Tongelreep), ~~kan worden gekozen voor het inbrengen van grind~~. ~~Daarbij~~ is ~~beschaduwing van het grindbedtraject belangrijk~~.		Flow velocity variation can also be stimulated by main channel mowing or by introducing dead wood. When there is insufficient space for these natural measures, (as is the case for the Tongelreep), introducing gravel is an option. Providing sufficient shade over the gravel area is important.
	\|Project title=Herinrichting beekdal Tongelreep		\|Project title=Herinrichting beekdal Tongelreep
	}}		}}

Bas Wullems at 12:45, 28 January 2021

2021-01-28T12:45:02Z

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			\|Subcatchment=De Dommel
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	\|Name=Valkenswaard		\|Name=Valkenswaard

Alexrrc at 11:26, 13 September 2019

2019-09-13T11:26:40Z

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MaritJob at 10:09, 7 September 2019

2019-09-07T10:09:00Z

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MaritJob at 10:01, 7 September 2019

2019-09-07T10:01:22Z

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	\|Monitored before=Yes		\|Monitored before=Yes
	\|Monitored after=Yes		\|Monitored after=Yes
	\|Qualitative monitoring=No		\|Qualitative monitoring=Yes
	\|Quantitative monitoring=No		\|Quantitative monitoring=Yes
	\|Control site used=No		\|Control site used=No
	\|Result=Improvement		\|Result=Improvement
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	\|Qualitative monitoring=No		\|Qualitative monitoring=Yes
	\|Quantitative monitoring=No		\|Quantitative monitoring=Yes
	\|Control site used=No		\|Control site used=No
	\|Result=Improvement		\|Result=Improvement
	}}
	~~{{Biological quality element table row~~
	~~\|Monitored before=No~~
	~~\|Monitored after=No~~
	~~\|Qualitative monitoring=No~~
	~~\|Quantitative monitoring=No~~
	~~\|Control site used=No~~
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MaritJob at 10:00, 7 September 2019

2019-09-07T10:00:58Z

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MaritJob at 09:48, 7 September 2019

2019-09-07T09:48:39Z

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	{{Hydromorphological quality element table row		{{Hydromorphological quality element table row
	\|Element=Width & depth variation		\|Element=Width & depth variation
	\|Monitored before=No		\|Monitored before=Yes
	\|Monitored after=No		\|Monitored after=Yes
	\|Qualitative monitoring=No		\|Qualitative monitoring=Yes
	\|Quantitative monitoring=No		\|Quantitative monitoring=Yes
	\|Control site used=No		\|Control site used=No
			\|Result=Improvement
	}}		}}
	{{Hydromorphological quality element table row		{{Hydromorphological quality element table row
	\|Element=Flow velocities		\|Element=Flow velocities
	\|Monitored before=No		\|Monitored before=Yes
	\|Monitored after=No		\|Monitored after=Yes
	\|Qualitative monitoring=No		\|Qualitative monitoring=Yes
	\|Quantitative monitoring=No		\|Quantitative monitoring=Yes
	\|Control site used=No		\|Control site used=No
			\|Result=Improvement
	}}		}}
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MaritJob at 09:45, 7 September 2019

2019-09-07T09:45:42Z

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MaritJob at 09:41, 7 September 2019

2019-09-07T09:41:27Z

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	\|Other motivation=KRW richtlijnen, verbeteren van de ecologie		\|Other motivation=KRW richtlijnen, verbeteren van de ecologie
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	{{Measures}}		{{Measures
			\|Bank and bed modifications measure=Dood hout, Grind bedden
			\|Other technical measure=Bouwen met Natuur
			}}
	{{Hydromorphological quality elements header}}		{{Hydromorphological quality elements header}}
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MaritJob at 09:40, 7 September 2019

2019-09-07T09:40:13Z

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	\|Monitoring Lead organisation=Waterschap De Dommel		\|Monitoring Lead organisation=Waterschap De Dommel
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	{{Motivations}}		{{Motivations
			\|Other motivation=KRW richtlijnen, verbeteren van de ecologie
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	{{Measures}}		{{Measures}}
	{{Hydromorphological quality elements header}}		{{Hydromorphological quality elements header}}