River Boyne Water Quality Management Plan - EPA

River Boync Waler Qunlity Unnagrmml Plan2. Boyne Calclrment - Water Resources2.1 River Boyne and It's TributariesChapter 1 briefly described the Boyne river system and it's relationship to the administrativeboundaries as shown in Fig. 1. Approximately 54% of the catchment is in Co. Meath, 18% in Co.Westmeath, 12% in Co. Cavan, 8% in Co. Kildare, 5% in Co. Offaly and 3% in Co. Louth.The catchment is relatively flat, containing no mountains with a watershed the summits of which aretypically 2.50111 O.D. to 340m O.D., the highest levels being in the north and north-east. The bulk ofthe catchment is under 75m O.D.The two largest towns in the catchment are Drogheda on the Boyne estuary including the port andNavan, which is by far the largest inland town in the catchment and is the administrative capital ofCo. Meath. Table 2.1 is a list of the 15 largest urban centres in the catchment.TABLE 2.1 - BOYNE CATCHMENT TOWNSFor inspection purposes only.Consent of copyright owner required for any other use.The sub-catchments of the main tributaries of the River Boyne system are summarised in Table 2.2.The most significant tributary is the Kells Blackwater, which is equivalent to over one quarter of thetotal catchment including the area of Co. Cavan and a significant area of north Co. Meath. Othersignificant sub-catchments are the Deel draining the bulk of the catchment in Co. Westmeath, theYellow River in Co. Offaly and the Longwood Blackwater draining part of Co. Kildare.Associating the towns with the tributaries, the larger towns are on the main channel of theBoyne andon the Kells Blackwater (Kells, Bailieboro and Virginia).EPA Export 26-07-2013:17:26:59