RiversOnline version Write the answer with one or two words that includes the letter at the beginnig or within the word by Blanca Roldán A C D E F H I K L M N O R S T W Contiene la A Contiene la C The middle section of a river as it passes through flat land. Empieza por D An artificial retaining wall on a river, used to regulate the outflow of a natural watercourse and to form a reservoir or reservoir to feed a hydroelectric power station. Contiene la E A body of salt water covering approximately three-quarters of the earth's surface. Empieza por F The amount of water carried by a river. Empieza por H The course of a river at its source. Contiene la I A large artificial water reservoir, usually constructed by closing the mouth of a valley by means of a dam or weir, which retains the waters of a river or rainwater for irrigation, population supply or energy production. Contiene la K A large natural water reservoir in a depression in the ground, which collects rainwater, groundwater or water from one or more rivers. Empieza por L The end of the course of a river. Empieza por M Place where rivers originate. Contiene la N A sharp bend formed by a river in its course. Empieza por O Place where a river discharges its waters into the sea, lake or another river. Empieza por R A freshwater stream formed by melting rain or snow water. Empieza por S Place where the river originates. Empieza por T A secondary stream or river that carries its waters to a larger or main river. Empieza por W The land through which a river flows.