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Okay, boys and girls, we're going to review these definitions that are on page 25. These definitions, length, flow, flow region. Sorry, I'm right. Flow region, please. Flow region.

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Okay, first one, length.

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Length is the distance between the source of the river to the river mouth.

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So, source, nacimiento, river mouth, desembocadura.

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Source, el empiece, donde empieza, the river, starts the river, ends the river.

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Source, river mouth, okay?

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So, the distance between the source.

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The other river mouth is, ¿cómo le llamamos?

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How do we call it?

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Left.

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Left.

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The distance between the source and the river mouth, all this, all this is the left.

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Muy bien.

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La longitud de un río.

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¿Cómo se mide?

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How you measure?

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Medimos desde el ambiente, que es the source, hasta el, perdón, determina que es river mouth.

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Okay?

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Very good.

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You know what is the longest river in the world?

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¿Sabe cuál es el río más largo del mundo?

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El Amazonas.

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No.

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El...

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¿El Nilo?

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¿El Nilo?

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No.

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No.

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No.

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It's the longest river in the world.

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In the world.

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So, we got long rivers, short rivers, ¿vale?

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Ríos largos, ríos cortos, ¿vale?

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Chicos, ríos largos, ríos cortos.

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Longer, más largo.

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Shorter, más corto.

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¿Ok?

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Ok, so we are different.

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Pueden ser diferentes porque unos son más largos o más cortos.

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¿Ok?

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Longer or shorter.

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Next, flow.

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What about the flow?

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can you see we have here a river and oh they said one river and the other river

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what is the difference

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so what can you see

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Yes, it's the same way, un momento, it's the same way, igual de ancho, ¿verdad, chicos?

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More or less, sí, pero, in the first case, you have a lot of flow, muchísimo caudal.

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But here, you can find less flow.

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So, a river with a lot of flow, un río con mucho caudal, le decimos que tiene abundant flow, abundante, ¿vale?

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What about this second case?

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A river with less flow, con poquito of low flow, here is this, a low flow river, tiene o has got low flow, tiene poco caudal, has got low flow.

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And you know what is the river or which is the river with the highest flow in the world? El río más caudalos del mundo es, you know, the Amazon.

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The Amazon, the Amazon, the Amazon has got the highest, the highest flow in the world.

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Pero no era el río Tío.

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No, this is the longest.

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El más alto, pero el caudal, es la cantidad de agua.

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¿Vale?

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The Amazon es el más caudaloso.

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Y el de Nile es el más largo, ¿ok?

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Esto es diferente, mucha cantidad de agua a más largo, más kilómetros, ¿eh?

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It measures more kilometers, el Nile tiene más kilómetros que cualquier río en el mundo, ¿vale?

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El Nile.

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And what about the Amazon, que es el que más agua tiene en todo el mundo, ¿vale?

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So, we talk about flow, estamos hablando de flow aquí, ¿vale?

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Fluoridine. Fluoridine, el régimen fluvial o caudal, y eso depende de, durante todo el año, through all the year, you see all the year, it's got the same water through the year, through all the year.

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Si tiene el mismo caudal durante el año, es, decimos que es un stable, has got a stable

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flow region.

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Estable.

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Siempre todo el año tiene el mismo agua.

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The rivers in the Cantabrian watershed, los ríos del norte del Cantábrico, tienen siempre

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stable flow region.

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Porque llueve mucho, siempre hay precipitaciones y siempre está igual.

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Okay?

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But, for example, Mediterranean watershed, en el Mediterráneo, en los ríos del Mediterráneo, que los vamos a ver más adelante, vais a ver, has got variable flourishing.

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¿Por qué?

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Because in summer, it's very, very dry.

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It doesn't rain.

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No llueve.

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Y no hay agua.

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Así que en verano, en la estación seca, no tendrá agua.

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¿Vale?

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Entonces, en invierno sí que llueve un poquito y en verano nada de nada.

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So, in winter would be, ¿cómo será en invierno?

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¿Será, tendrá abundant flow or low flow?

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Los ríos del Mediterráneo que están en una zona más seca.

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¿Eh?

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Abundant.

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Y in summer, how would it be?

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It'd be, would be, abundant or low flow?

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Low flow because it doesn't rain.

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Entonces, como cambia, the flow path, the flow routine is, the flow routine is variable.

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Cuando cambia, it's variable.

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Cuando no cambia, porque tiene mucho a lo de las montañas, a lo del mar, it's stable.

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¿Vale?

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La diferencia entre los ríos del norte y los del Mediterráneo es que the north of Spain

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has called rivers, and they have a stable flow regime, but in the Mediterranean watershed

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has called rivers that has a variable flow regime.

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¿La habéis entendido?

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Yes.

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Ok.

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Excelente.

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¡Ay!

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¡Que me la hemos grabado!

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Así.