The Merderet is a 36 km long river in Normandy, France which is tributary to the Douve River.[1] The river has relatively high turbidity and its brownish water is somewhat low in velocity due to the slight gradient of the watercourse; pH levels have been measured at 8.31[2] near the Chateau d'Isle Marie and electrical conductivity of the waters have tested at 61 micro-siemens per centimetre. At this reference location, summer flows are typically in the range of 250 cubic feet per second.
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