Carricknabraher Priority Area for Action – Deskstudy Summary
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Carricknabraher Priority Area for Action – Deskstudy Summary This is a summary of the deskstudy for the Carricknabraher Priority Area for Action (PAA), Co. Roscommon. Deskstudies are reports that are prepared by the catchment scientists using available information and data. To write these reports, we use information available for all waters that we plan to assess in the PAA. We get our information from: • The Environmental Protection Agency • Local Authorities • Inland Fisheries Ireland • Irish Water • The Department of Agriculture, Food and the Marine • Other public agencies. The deskstudy also includes information learned from the public at a community information meeting specific to the Carricknabraher PAA which was held on the 26th July 2021. In our deskstudies, we examine a number of things: • quality – how the water quality has changed since 2007 • importance – for example, if its water is used for drinking water, and if there are any rare plants or animals in it that we need to protect • impacts from human activity – here we focus on impacts that damage water quality such as from wastewater discharges, agriculture, forestry practices, physical changes to the water etc. We complete desk studies first before starting our field-based assessments or local catchment assessments (LCAs). 1. Background and Location LAWPRO catchment scientists work in specific catchment areas called Priority Areas for Action (PAAs). The Carricknabraher PAA covers an area of approximately 142 km2 in the north of Co. Roscommon, between Castlerea and Boyle. The PAA is made up of six waterbodies; five river waterbodies which are distinguished by a unique name and number, and one lake waterbody (shown in Figure 1): Carricknabraher_010 rises in the west of the PAA and forms the Carricknabraher River that flows in an easterly direction and crosses the N5 road to the south of Frenchpark at Cloonshanville Bridge, and transitions to the Carricknabraher_020 waterbody. The Owennaforeesha_010 rises in the south of the PAA and flows in a northerly direction and forms the Owennaforeesha River that crosses the N5 road at Bellanagare and transitions into the Breedoge_010 waterbody. From here, the 1 Owennaforeesha River continues to flow north and joins the Carricknabraher River at Loughbally Bridge, near Cloonshanville Bog to the west of Frenchpark. Mantua_010 rises in the east of the PAA, to the west of Elphin, and forms the Mantua River that flows in a westerly direction. The Mantua River crosses into the Breedoge_010 waterbody close to Kilnamryall, and then transitions into the Breedoge River and continues to flow west until being joined by the converged Carricknabraher and Owennaforeesha Rivers, to the east of Cloonshanville Bog. The Breedoge River then flows north and is joined by the Bella River which is formed by several tributaries that flow west from an area to the south of Ballinameen, in the Breedoge_010 waterbody. The Finisclin River, which is formed by the outflow from Treanamarly Lough in the Granny_010 waterbody, flows in a westerly direction and joins the Breedoge River close to the townland of Breedoge, which also marks the exit point of the river from the Carricknabraher PAA. From here, the Breedoge River flows in a north-westerly direction before entering Lough Gara. This area was selected as a PAA in order to build on improvements at the Frenchpark wastewater treatment plant; because there are two deteriorated waterbodies in the PAA; and the waters in the PAA ultimately flow into Lough Gara. Figure 1: The Carricknabraher PAA 2. Catchment Description A catchment is an area of land around a river, lake, or other body of water. Rainwater that falls in the catchment flows to the river and lakes. 2 The main settlements in the catchment area of the Carricknabraher PAA are the villages of Frenchpark, Bellanagare and Ballinameen, with most of the area typical of north Roscommon. Agricultural pastures are the principal land type, with the rest of the land covered by coniferous forestry and peat bogs. Soils are generally wet throughout the PAA and are either peaty or poorly drained. The waterbodies within the Carricknabraher PAA are important for several reasons. The Breedoge River that flows out of the PAA enters Lough Gara, which is a designated drinking water lake and a Special Protection Area on account of the internationally important populations of Greenland White- fronted Goose and Whooper Swan that are associated with the lake. The Finisclin River in the north of the PAA is also a designated drinking water river. There are several peatland sites that are designated for protection within the PAA and that support a range of habitats and species. Bellanagare Bog and Clonshanville Bog have both been designated as Special Areas of Conservation with water dependent habitats and species, including raised bog. Bellanagare Bog is also a Special Protection Area as it was known to be utilised by part of an important Greenland White-fronted Goose population. The geese appear to have since abandoned this peatland site in favour of grassland sites elsewhere, but red grouse are still known to occur at this site. There are three Natural Heritage Areas also located in the north of the PAA and that all have peatlands as qualifying interests. These are the Bella Bridge Bog, Cornaveagh Bog and Tullaghan Bog. These Natural Heritage Areas support a good diversity of raised bog microhabitats. 3. Water Quality History in the Carricknabraher PAA Rivers and lakes are classified into five quality classes (status), with high status being unpolluted and bad status the most polluted. High Good Moderate Poor Bad The EPA assign status at (approximately) 3-yearly intervals based on the standards set out in the Water Framework Directive. Status is based on many different elements that altogether indicate the overall health of the river, for example the biology and ecology recorded in river and lake habitats, the physico-chemical condition of the waterbodies (i.e. oxygen levels, nutrient concentrations, indicators of organic and chemical pollution, etc.) and also the physical condition of the river bed and bank or lake shore. We need to make sure that the Carricknabraher_010, Carricknabraher_020, Owennaforeesha_010 and Breedoge_010 achieves their Good Status objective. The Mantua_010, Granny_010 and Treanamarly Lough are unassigned and therefore their environmental objectives have not been set until their water quality is better known. We have reviewed water quality data available for each of the waterbodies and we have found that: • Carricknabraher_010: This river has consistently achieved Good status since 2007 and is achieving it’s objective. This Good Status needs to be protected. • Carricknabraher_020: This river has been at Poor Status since 2010 and is therefore failing to achieve it’s Good Status objective. We are unsure what is causing this unsatisfactory water quality and LCA will be required to establish the impacting pressures. The EPA has identified Extractive Industry and Hydromorphology as significant pressures. • Owennaforeesha_010: This river is currently at Good Status and is achieving it’s objective. This status needs to be protected. The EPA has identified Agriculture, Urban Run-off and Hydromorphology as significant pressures. 3 • Breedoge_010: This river has been at Poor Status since 2010 and is therefore failing to meet it’s Good status objective. We are unsure what is causing this unsatisfactory water quality and LCA will be required to establish the impacting pressures. The EPA has identified Extractive Industry, Hydromorphology, Forestry and Urban Run-off as significant pressures. • Mantua_010, Granny_010 and Treanamarly Lough: These water bodies are not monitored by the EPA and therefore are unassigned. LCA will seek to gather water quality information and determine if they are impacted or not. 4 Table 1: Ecological status, pressures and significance in the Carricknabraher PAA Ecological Status EPA Characterisation Significant Desk Study Review Desk study Review EPA Characterisation WB Pressure Potential additional Potential Significant WB Name Risk 2007 2010 2013 2016 Significant Issue Type Category (Sub-category) pressures Issue – – - - (2013-2015) (2013-2015) (2019) (2019) 2009 2012 2015 2018 Extractive Industry (Peat), Altered habitat due to Hydromorphology (Land Not at Morphological Carricknabraher_010 River Good Good Good Good N/A N/A Drainage), Forestry and Risk changes, Sediment and Anthropogenic (Road Nutrient Pollution Construction) Extractive Industry (Peat) and Altered habitat due to Hydromorphology (Land Drainage) Organic Pollution and Altered Morphological Urban Wastewater (Agglomeration Anthropogenic (Road Carricknabraher_020 River Review M1 Poor Poor Poor habitat due to Morphological changes, Sediment, PE 500 to 1,000) and Forestry Construction)2 changes Organic Pollution and (Clearfelling) identified as non- Nutrient Pollution significant pressures Agriculture (Farmyards), Urban Altered habitat due to Run-off (Diffuse Sources Run-off) Nutrient Pollution, Organic Morphological and Hydromorphology (Land Owennaforeesha_010 River Review M Good M Good Pollution and Altered habitat Extractive Industry (Peat) changes, Sediment, Drainage) due to Morphological changes Organic Pollution and Forestry (Forestry) identified as Nutrient Pollution non-significant pressure Forestry (Clearfelling), Extractive Industry (Peat - Harvesting), Hydromorphology (Land Drainage) Altered habitat due to and Urban Run-off (Diffuse Sources Nutrient Pollution,