Dollymount Strand (2013)
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Bathing Water Profile - Dollymount Strand (2013) Bathing Water: Dollymount Strand Bathing Water Code: IEEABWC090_0000_0400 Local Authority: Dublin City Council River Basin District: Eastern Monitoring Point: 323291E, 236691N 1. Profile Details: Profile Id: BWPR00138 Toilets Available: Yes Year Of Profile: 2013 Car Parking Available: Yes Year Of Identification 1992 Disabled Access: Yes Version Number: 1 First Aid Available: Yes Sensitive Area: Yes Dogs Allowed: Yes Lifesaving Facilities: Yes Figure 1: Bathing Water 2. Bathing Water Details: Map 1: Bathing Water Location & Extent Bathing Water location and Dollymount Beach is situated on the North Bull island which is a low-lying dune covered sand spit, nearly extent: 4.85km long and 0.70km wide at its widest point. It runs parallel to the coast between Clontarf and Sutton in the northern half of Dublin Bay. On the South North Bull island is bounded by the Bull wall and on the North it is separated from Howth head by Sutton Creek. A series of dun ridges make up the back bone of the island. On the seaward side, these are delimited by Dollymount strand and by a salt marsh and lagoon on the leeward side. The Blue flag bathing area on Dollymount is positioned and demarcated on the southern side of the Causway on the strand.The full bathing area runs from the north Bull wall to the northern tip of the Island. Main features of the Bathing Type of Bathing Water Water: North Bull Island is a coastal sand spit located in Dublin Bay. It is one of the finest sand dune systems in Ireland and is internationally important in terms of its conservation value. There are high quality examples of several rare and threatened coastal habitats present on the island. It has a wealth of biodiversity, which includes several habitats and species listed in Annexes I and II and the EU Habitats Directive, the use of the site by national and internationally important numbers of wintering waders and wildfowl and the presence of several rare plants listed on the Flora Protection Order (S.I. No. 94 of 1999) and in the Red Data Book (Curtis & McGough 1988). Flora/Fauna, Riparian Zone North Bull island is managed as a public park by DCC, the Island has several notable ecological and geomorphological features. The site is unique due to its relatively young age just over 200 years) when compared to other coastal sites, and that the island is still growing. Young accreting sand dunes systems are very rare in Ireland. Both these factors positively influence the conservation status and diversity of some of the habitats present such as embryonic dunes and dune slacks. The_dune slacks are at an early stage in their development and consequently are quite diverse. Several rare bryophyte species such as Petalwort favour the conditions found in the early phases of dune succession. This island also contains intact natural successional stages between sand dune and saltmarsh habitats, which are rare in Ireland. Water Depth Tidal Range Overall, the gross tidal movement in Dublin Bay is clockwise. However, the localised movements are complex. Around North Bull Island the flow is altered due to interference from the Bull Wall, the Tolka River and Sutton Creek. Generally, tidal flow on Dollymount Strand is longshore to the north-east, Main features of the Bathing Water: although on the ebb tide the water is caught up in a fluvial 'jet' which emanates from between the Bull Wall and South Wall. The so-called 'lagoons' landward of North Bull Island are connected to two different channels: the southern area fills and empties beneath Bull Bridge, while water in the northern area is channelled in and out through Sutton Creek (Harris, 1977). Land Use The two main land-uses on the island are nature conservation and amenity use. The two golf courses on the island are mainly used for amenity purposes (and included within the SPA boundary) while the rest of the terrestrial, intertidal and sub-tidal sections of the island are used or managed for a combination of amenity and nature conservation uses. Active nature conservation management currently includes activities such as using Ectocarpus detritus to prevent dune erosion, vehicle management on Dollymount Strand and removing invasive Sea Buckthorn (these activities are described in more detail in subsequent sections.) Previous nature conservation management included controlling Common Cordgrass and planting Marram-grass in eroded dune areas. Sensitive Area Currently the island holds the following designations: Bird Sanctuary ( Wildbird acquisition 1955), Nature Reserve (Wildlife Act 1976). Special Protection Area( EEC directive 79/409 and EU habitats Directive 92/43). UNESCO Biosphere Reserve 1081, Ramsar Wetland (International convention on Wetlands). Special Amenity Area 1994, Special Area of Conservation. Visitor Numbers: Numbers of beach users have reached peaks of 8000-10000 in the past (Environmental Research Unit 1992a North Bull Island is subject to heavy recreational pressure at times due to its proximity to the centre of Dublin. It is, in any case, an extremely attractive site, with a wide beach along its full length, consisting to a large degree of fine-grained sand. Dollymount Strand is a ‘Blue Flag’ beach and is popular with bathers and beach-lovers, especially on sunny bank holiday weekends). Max. number of visitor during a day in high season: Approx number of visitor during the bathing season: 10000 Activities available at the Walking, kite-flying and water sports are among the regular activities at the site. Daily numbers of walkers Bathing Water: were estimated to be 150 while numbers participating in canoeing and rowing were 30-40 per day. Several football teams train at North Bull Island. There are several yachting or water-sports clubs located around the site including the Sea Scouts that are located on the site. Dog walkers frequently use paths in the dunes and around the beach. Wind-powered activities such as kite-surfing have increased in popularity in recent times. The site is also used by the Irish Whale and Dolphin Group (re-floating beached whales) and also for water safety training. The high nature conservation value of the site also attracts nature-lovers including bird-watchers. Several nature conservation groups such as Birdwatch Ireland, Irish Wildlife Trust and Dublin Naturalist's Field Club regularly run field-trips to the island. Bait digging is a common activity, especially at the northern and southern ends of the site, in Sutton Creek and near the Wooden Bridge. More recently, individuals and small groups have collected shellfish including Mussels( Mytilus edulis) from the North Bull Wall. Dollymount Strand is used for angling as is the North Bull Wall. The island is frequently used for educational and research purposes and there is an interpretative Centre located near the causeway. This centre attracts school groups and other groups for talks on the island. The Interpretative Centre is a ‘Discover Primary Science’ field centre. Third-level colleges frequently have field-trips to the site and there have been many undergraduate and post-graduate studies on various aspects of the island. Contributing catchment North Bull Island is confined between the North Bull Wall of Dublin Bay and outlet of Sutton Creek. details: Northerly growth of the island has up until now been prevented by the eroding nature of Sutton Creek as it enters the sea, thus stopping it from coalescing with the main land. The Islands Contributing Catchment area is the North Central Area Dublin City. Communities directly adjacent to the beach comprise of Marino, Fairview, Clontarf, Dollymount, Raheny, Kilbarrack, Sutton. Hydrology Contributing catchment details: A number of smaller rivers and streams also enter the site, including two on the landward side of North Bull Island: the Santry River, which flows into Sutton Creek, and the Naniken Stream which enters a channel flowing south-westward under Bull Bridge. The North Bull Island is considered to have a lens of freshground water that develops immediately below the ground surface and extends many metres below the surface. This freshwater lens ‘floats’ on denser seawater situated below the island. The freshwater lens is dynamic and discharges around the margins of the island. Winter rains recharge the lens resulting in the water table forming a mound at the centre of the island (Environmental Impact Services 2001). The RDGC collects ground water for irrigation via ground bores, which is pumped to a central reservoir for distribution around the golf course (RDGC 1999). St Anne’s Golf Club abstracts ground water from a pond and shallow well located to the north of the clubhouse (Environmental Impact Services 2001). A number of medium to large (by Irish standards) sized rivers discharge to Dublin Bay and, therefore, may influence water quality in Dollymount, Sandymount and Merrion Strands. The largest of the rivers are the Liffey, Tolka, Santry and Dodder and the various tributaries that drain to them. Dollymount Strand is also impacted by a number of smaller streams including the Nanniken River, the Kilbarrack River, Fox’s Stream and The Wad, which is almost entirely culverted. It may also be impacted by runoff from the southern side of Howth Head. As Dollymount Strand is located in an entirely unban area, it is also influenced by discharges from the drainage network, including the surface water drainage network and discharges from the foul and combined sewer networks during periods of heavy rainfall. There are a variety of pressures within the contributory catchment, including combined sewer overflows, IPC/IPPC sites, Sites licensed under Section 4 of the Local Government (Water Pollution) Act, 1977, as amended, and Wastewater Treatment Plants. The contributory catchment is approximately 2,000 km2 and is illustrated in the map attached. Monitoring point details: In line with laboratory procedure and Blue Flag Guide lines water testing is taken as random samples within the Blue Flag bating area concentrate in areas of concentrated bathing.