Voltoya River province of Ávila and enters that of Segovia , to pass through Juarros de Voltoya and the Nava de la Asunción. Voltoya River The Voltoya is a river in Spain. It is a tributary river of Eresma River which is, in turn a tributary of the Adaja River that emerges from Douro River. Its starts in the mountains of Guadarrama and Malagón. The water from Dehesa de la Cepeda , enclave of the city of Madrid and the Azálvaro Field also flow into the Voltoya . It runs through the Castilian-Leonese provinces of Ávila and Segovia . Its mouth is
Waihopai River (Southland) Waihopai River (Southland) The Waihopai River — the more southerly of two New Zealand rivers of that name — runs through the South Island's Southland Region. A narrow stream for much of its length, it has its source in several streams arising in low hill country between Edendale and Dacre, all of which run generally west-southwest, passing through or close to the township of Woodlands. These streams gradually merge, becoming one river some east of Invercargill. The Waihopai runs west from this point, passing through the northern suburbs of Invercargill City and then turns south, running between Invercargill's built-up area