Advances in Water Treatment and Enviromental Management

RIVER FANE FLOW REGULATION SCHEME 233Finally, and in keeping with the non intrusive philosophy of the Scheme, thearchitectural treatment of the Pumping Station has provided a structure similar toa late 19th century granary typical of the Lough Muckno area and fullycomplementary to the Lake/River Environment there.2. HYDROLOGY OF THE LOUGH MUCKNO-FANE RIVER SYSTEMThe design of the Headworks at Lough Muckno followed a detailed HydrographieSurvey of the Lake bed as well as hydrological study of the Lake-River System.As has been mentioned, there are two lakes of significant size on the Fane RiverSystem, Lough Muckno being the upstream and major lake, connected with thedownstream Lough Ross by a 3 km short reach of river known as the ClarebaneRiver. There are two principal Flow Gauging Stations on the catchment, one atClarebane Bridge approximately midway between the two lakes, the second on theRiver Fane downstream of Lough Ross at Moyles Mill near Inniskeen, CountyMonaghan.The principal characteristics of Lough Muckno and the flow recording stations areas follows:A. STORAGE/AREA Lough Muckno1. Lake area at MaximumRecorded Flood Level568 ha2. Lake area at LowestRecorded Summer Level338 ha3. Impounded Storage(92.1m OD to 91.3m OD)2.6 million cu.m4. Available Storage forPumping (91.3mOD—88.6m OD)8.4 million cu.mB. LEVELS (metres AOD)1. Highest Recorded Flood Level 92.872. Upper Impoundment Level 92.13. Level at which Pumping mustcommence at full demand 91.34. Lowest Recorded Summer Level 90.975. Control Structure Apron Level 90.76. Projected Drawdown Level atFull Demand in 1975 typeDrought Conditons 88.6TABLE 1: LOUGH MUCKNO HYDROGRAPHIC CHARACTERISTICSFlow Gauging Station Clarebane Bridge Moyles MillCatchment Area to Station 163 Km 2 230 Km 2Mean Annual Flow 2.75 m 3 /s 3.76 m 3 /sPeak Flood 17.1 m 3 /s 34.6 m 3 /sLowest Recorded Flow 0.02 m 3 /s 0.00 m 3 /sTABLE 2: RIVER FANE FLOW GAUGING STATIONSLough Ross is a relatively small lake, 88 ha in area, and will operate without controls,rising and falling in response to releases at Lough Muckno. Referring to the flow