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B1 noun 11分钟阅读

caudal

开始练习例句笔记与提示 caudal 30秒了解

解析 caudal in your Level:

At the A1 level, you don't really need to use the word 'caudal' yet. It's a bit too technical for a beginner. However, you might see it in simple weather news or on a sign near a river. For now, just think of it as a fancy way to say 'the amount of water moving in a river'. If you see 'o caudal é grande', it means 'there is a lot of water moving'. It's good to recognize it, but focus on simpler words like 'água' (water) and 'rio' (river) first. You can think of it like the word 'flow' in English. It's a masculine word, so we always say 'o caudal'. Even at this level, knowing it exists helps you understand more of what you hear on the radio or TV when people talk about the rain.

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At the A2 level, you are starting to describe the world around you in more detail. You might use 'caudal' when talking about a trip to a famous river or waterfall. You can say things like 'O rio tem muito caudal' (The river has a lot of flow). You should understand that it's a noun used to describe the quantity of water in motion. It's also the time to learn that it's a masculine noun, so you use 'o' or 'um'. You might encounter it in basic geography lessons or simple news articles about the weather. It’s a step up from just saying 'muita água' (much water). Using 'caudal' makes you sound like you are paying more attention to how the river actually behaves, which is a great way to improve your descriptive skills.

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At the B1 level, 'caudal' becomes a very useful word. You should be able to use it to discuss environmental issues, weather changes, and simple technical descriptions. You should understand the difference between 'caudal' (the rate of flow) and 'volume' (the total amount). You can start using it in sentences with verbs like 'aumentar' (increase) or 'diminuir' (decrease). For example: 'O caudal do rio aumentou depois da chuva' (The river's flow increased after the rain). You should also be aware of its metaphorical use, like a 'caudal de gente' (a flow of people). This word is essential for reading newspapers or watching the news in Portuguese-speaking countries, as it appears frequently in reports about floods, droughts, and hydroelectric power.

At the B2 level, you should use 'caudal' with precision in professional or academic contexts. You should be comfortable discussing 'caudal ecológico' (the minimum flow needed for the environment) or 'caudal médio' (average flow). You should also understand its use in fluid mechanics or engineering if those are your fields. At this level, you can use the word to add nuance to your writing and speaking, moving beyond literal water to abstract 'flows' of data, money, or emotions. You should be able to explain the concept of 'caudal' to someone else using Portuguese. You will also notice it more in literature, where it might be used to describe a 'caudal de sentimentos' (a flow of feelings), and you should be able to appreciate the poetic weight it carries in those contexts.

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At the C1 level, you should have a full grasp of 'caudal' and its synonyms like 'vazão' or 'fluxo'. You should know when to choose 'caudal' for its specific technical or formal connotations. You can use it in complex arguments about sustainability, water management, or economic trends. You should also be familiar with rare uses of the word, such as its adjectival form in biology (relating to the tail), although the noun form remains much more common. Your ability to use 'caudal' in metaphorical and idiomatic ways should be natural. You might use it in a sophisticated essay to describe the 'caudal de influências' (flow of influences) that shaped a particular cultural movement. At this stage, the word is a tool for high-level precision and stylistic variety in your Portuguese.

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At the C2 level, 'caudal' is a word you use effortlessly and with complete awareness of its stylistic impact. You can use it to create vivid imagery in creative writing or to provide exacting detail in a scientific paper. You understand the historical development of the word and its relationship to other Latin-derived terms. You can distinguish between its use in European Portuguese and Brazilian Portuguese with ease, perhaps even using 'vazão' when speaking to a Brazilian audience and 'caudal' with a Portuguese one to show your deep cultural integration. You can play with the word's sounds and meanings in poetry or high-level rhetoric, using it to evoke the inexorable and powerful nature of a great river or a great idea. At this level, 'caudal' is not just a vocabulary word; it's a part of your expressive repertoire.

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开始练习例句笔记与提示

caudal 30秒了解

Caudal means 'flow rate' or the volume of liquid moving through a point over time.
It is a masculine noun ('o caudal') used primarily in hydrology and environmental science.
It can be used metaphorically to describe a large 'flow' of people, money, or information.
In Brazil, the word 'vazão' is often used as a more common technical alternative.

The Portuguese word caudal is a masculine noun that primarily describes the volume of liquid, especially water, moving through a specific point in a conduit or stream over a set period of time. In English, we most often translate this as flow rate, discharge, or simply volume. Understanding this word is essential for anyone discussing geography, environmental science, or even urban planning in a Lusophone context. While its roots are firmly planted in hydrology, the term has branched out into metaphorical territories, representing the 'flow' of abstract things like money, information, or people.

Hydrological Context: In its most literal sense, it refers to the cubic meters per second flowing through a riverbed. Engineers and environmentalists monitor the 'caudal' to predict floods or manage irrigation systems. If a river has a 'caudal elevado', it means the water is rushing through with significant force and volume.

As chuvas intensas de ontem fizeram com que o caudal do Rio Douro subisse perigosamente.

Economic and Abstract Flow: Metaphorically, 'caudal' describes a large quantity of something that moves or is delivered. You might hear about a 'caudal de investimentos' (a flow of investments) or a 'caudal de informações' (a flood of information). It implies a sense of continuous and voluminous movement.

A nova política atraiu um enorme caudal de capital estrangeiro para o país.

O caudal ecológico é a quantidade mínima de água necessária para preservar a vida no rio.

Durante a conferência, fomos bombardeados por um caudal incessante de dados estatísticos.

Technical Precision: In physics and fluid mechanics, 'caudal' is the standard term for discharge. It is calculated by multiplying the cross-sectional area of the flow by the average velocity of the fluid. This precision makes it a staple in academic and professional Portuguese discourse.

O medidor registou um caudal de dez litros por segundo na tubagem principal.

The word carries a weight of abundance. When you use 'caudal', you aren't just talking about a little bit of something; you are talking about a significant, measurable, and often powerful stream. Whether it's the water that powers a hydroelectric dam or the 'caudal' of emotions in a dramatic poem, the word evokes a sense of continuous, dynamic presence. It is a B1 level word because it moves beyond basic survival Portuguese and into the realm of descriptive, technical, and nuanced communication. By mastering 'caudal', you gain the ability to describe the physical world and abstract concepts with the precision of a native speaker.

Using caudal correctly requires understanding its role as a masculine noun and its common associations with verbs of movement and measurement. It almost always appears with the definite article 'o' or the indefinite 'um'. Because it refers to a volume or rate, it is frequently modified by adjectives like 'abundante', 'escasso', 'regular', or 'irregular'.

With Verbs of Change: Since flow rates change, 'caudal' is often paired with verbs like 'aumentar' (to increase), 'diminuir' (to decrease), 'estabilizar' (to stabilize), or 'medir' (to measure). These combinations allow you to describe the behavior of a river or a system over time.

Devido à seca prolongada, o caudal da ribeira diminuiu drasticamente este verão.

As a Subject or Object: You can use 'caudal' as the subject of a sentence to describe what the flow is doing, or as the object to describe what is being observed or controlled. For example, 'O caudal assustou os moradores' (The flow scared the residents) or 'Nós controlamos o caudal da barragem' (We control the dam's flow).

É necessário medir o caudal antes de abrir as comportas da represa.

O caudal médio anual deste rio é de cerca de 500 metros cúbicos por segundo.

A torneira tem um caudal muito fraco; demora imenso tempo a encher o balde.

Descriptive Prepositional Phrases: You will often see 'caudal' followed by 'de' to specify what is flowing. 'Caudal de água' is the most common, but 'caudal de ar' (air flow) in ventilation systems or 'caudal de sangue' in medical contexts are also correct and highly descriptive.

O sistema de ventilação garante um caudal de ar fresco constante em todas as salas.

When constructing sentences, remember that 'caudal' is a formal to semi-formal word. In casual conversation, you might just say 'a água do rio' (the river water), but using 'caudal' shows a higher level of education and precision. It allows you to distinguish between the water itself and the *rate* at which it is moving, which is a key distinction in many professional fields. Practice using it with 'grande' or 'pequeno' to describe the intensity of the flow, and you will quickly sound more like a proficient speaker.

You are likely to encounter caudal in several specific environments, ranging from the evening news to the pages of a classic novel. Understanding these contexts will help you recognize the word's register and intended meaning immediately.

The Weather and News Reports: In Portugal and other Lusophone countries, news anchors use 'caudal' whenever there is a storm or a period of heavy rain. They will report on 'o aumento do caudal dos rios' to warn people about potential flooding. Conversely, during a 'seca' (drought), they will discuss the 'baixo caudal' of reservoirs.

O telejornal informou que o caudal do Rio Tejo atingiu níveis históricos esta madrugada.

Educational and Scientific Settings: In schools and universities, 'caudal' is the standard term in geography and physics textbooks. Students learn about the 'caudal de ponta' (peak flow) and how it affects erosion and sediment transport. If you visit a science museum in Lisbon or Luanda, you'll see this word on many exhibits about water cycles.

Na aula de geografia, estudámos como o caudal de um rio influencia a formação de deltas.

As autoridades monitorizam o caudal das barragens para garantir a produção de energia hidroelétrica.

Literature and Fine Writing: Writers often use 'caudal' metaphorically to describe a rush of feelings or a stream of consciousness. It adds a poetic quality to the description of something being 'poured out'. You might read about a 'caudal de lágrimas' (a stream of tears) or a 'caudal de palavras' (a flow of words).

O poeta descreveu o seu sofrimento como um caudal inesgotável de melancolia.

Este chuveiro ecológico reduz o caudal de água sem perder a pressão.

In summary, 'caudal' is a word that bridges the gap between technical expertise and everyday awareness of the environment. Whether you're listening to a scientist, a journalist, or a storyteller, 'caudal' provides a vivid sense of movement and volume that is central to the Portuguese language.

Even for intermediate learners, caudal can present a few pitfalls. Avoiding these common mistakes will make your Portuguese sound much more natural and precise.

Confusion with 'Cauda': The most frequent error is confusing 'caudal' with 'cauda'. 'Cauda' means 'tail' (like a dog's tail or the tail of a comet). While they share a linguistic ancestor, their meanings in modern Portuguese are completely different. Saying 'o cão abanou o seu caudal' (the dog wagged its flow rate) would be a very funny mistake.

Errado: O avião deixou um caudal de fumo. (Unless you mean the volume of smoke flow, but usually people mean the 'cauda' or 'rasto'.)

Gender Mismatch: Some learners assume that because many words ending in '-al' can be adjectives, 'caudal' might be feminine or invariable. However, as a noun, 'caudal' is always masculine: 'o caudal'. Using 'a caudal' is incorrect.

Correto: O caudal do rio é impressionante hoje.

Errado: A caudal da torneira está fraca.

Overuse in Casual Contexts: While not a grammar error, using 'caudal' when you just want to say 'there is a lot of water' can sound overly formal. If you are at the beach and a big wave comes, you wouldn't usually comment on its 'caudal'. You'd talk about the 'força' (strength) or 'tamanho' (size) of the wave.

Natural: Olha quanta água vem no rio! (Informal) vs. Observe o caudal do rio. (Formal/Technical)

No Brasil, é mais comum dizer 'a vazão da represa' do que 'o caudal'.

Finally, be careful with the plural 'caudais'. It is used when comparing the flow rates of multiple rivers or different points in a system, but many students forget to change the ending from '-al' to '-ais'. Always remember: um caudal, dois caudais. Keeping these points in mind will help you use 'caudal' with confidence and accuracy.

To truly master caudal, you should know how it compares to other words that describe movement and quantity. Portuguese has a rich vocabulary for fluids and flows, and choosing the right word depends on the context and the emphasis you want to create.

Caudal vs. Fluxo: 'Fluxo' (flow) is a more general term. It describes the act of flowing or a continuous movement. 'Caudal' is more specific to the *volume* or *rate* of that flow. You have a 'fluxo de caixa' (cash flow) in accounting, but you might describe the 'caudal' of that flow if you are focusing on the sheer amount of money passing through.

O fluxo de trânsito é intenso, mas o caudal de veículos por hora é que determina a necessidade de uma nova ponte.

Caudal vs. Corrente: 'Corrente' (current) refers to the direction and speed of the movement, often focusing on the force of the water. While 'caudal' tells you how much water there is, 'corrente' tells you how fast and in what direction it is moving. A river can have a low 'caudal' but a very strong 'corrente' if the channel is narrow.

Embora o caudal fosse pequeno, a corrente era forte o suficiente para arrastar pedras.

A vazão da bomba de água é de 50 litros por minuto.

Caudal vs. Volume: 'Volume' is a static measure. It's how much water is in a glass or a lake. 'Caudal' is dynamic; it's the volume *in motion*. You measure the 'volume' of a reservoir, but you measure the 'caudal' of the river that feeds it.

O volume total da albufeira é enorme, mas o caudal de entrada é insuficiente para mantê-lo cheio.

Uma torrente de lama desceu a montanha após o deslizamento.

By understanding these distinctions, you can choose the word that fits your exact meaning. Whether you need the technical precision of 'caudal', the general movement of 'fluxo', or the static measurement of 'volume', your Portuguese will be more effective and sophisticated.

How Formal Is It?

趣味小知识

Even though it comes from 'tail', in modern Portuguese, it's almost never used to mean 'tail' except in very specific biology terms. Its primary meaning has completely shifted to water flow.

发音指南

UK /kawˈðal/

US /kawˈdaw/

The stress is on the last syllable: cau-DAL.

押韵词

animal final canal natal portal quintal sinal total

常见错误

Pronouncing it like 'cauda' (tail).
Stress on the first syllable (CAU-dal).
Confusing the 'au' sound with 'o'.
In European Portuguese, not making the 'l' dark enough.
In Brazilian Portuguese, making the 'l' too hard like an English 'l'.

难度评级

阅读 3/5

Common in news and science texts, but requires context to distinguish from 'cauda'.

写作 4/5

Easy to misspell the plural or use the wrong gender if not careful.

口语 3/5

Pronunciation of the 'au' diphthong can be tricky for beginners.

听力 3/5

Easily confused with other similar-sounding words in fast speech.

接下来学什么

前置知识

rio água muito grande correr

接下来学习

vazão bacia afluente foz nascente

高级

hidrodinâmica pluviometria sedimentação evapotranspiração estuário

需要掌握的语法

Plural of words ending in -al

Caudal -> Caudais; Animal -> Animais

Noun-Adjective Agreement (Masculine)

O caudal abundante (not abundanta)

Contraction with 'de'

O caudal do rio (de + o)

Use of 'haver' for existence

Houve um grande caudal de chuva.

Definite article with rivers

O caudal do Tejo (Rivers usually take 'o').

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按水平分级的例句

O caudal do rio é pequeno hoje.

The river's flow is small today.

Uses 'o' (masculine article) and 'é' (verb to be).

O rio tem um grande caudal.

The river has a large flow.

Uses 'um' (indefinite masculine article).

A chuva aumenta o caudal.

The rain increases the flow.

Subject (A chuva) + Verb (aumenta) + Object (o caudal).

O caudal de água é forte.

The water flow is strong.

Uses 'de água' to specify what is flowing.

Eu vejo o caudal do rio.

I see the river's flow.

Simple SVO structure.

O caudal não é perigoso.

The flow is not dangerous.

Negative sentence using 'não'.

Onde está o caudal?

Where is the flow?

Interrogative sentence.

O caudal é azul.

The flow is blue.

Simple adjective agreement (masculine).

O caudal do rio subiu muito ontem.

The river's flow rose a lot yesterday.

Past tense 'subiu' (rose).

Nós medimos o caudal da ribeira.

We measured the stream's flow.

First person plural past tense.

A barragem controla o caudal da água.

The dam controls the water flow.

Verb 'controla' shows action.

Este rio tem um caudal constante.

This river has a constant flow.

Adjective 'constante' modifies 'caudal'.

O caudal diminuiu por causa do sol.

The flow decreased because of the sun.

Prepositional phrase 'por causa de'.

Eles querem ver o caudal da cascata.

They want to see the waterfall's flow.

Compound verb 'querem ver'.

O caudal traz muita areia.

The flow brings a lot of sand.

Verb 'traz' (brings).

É um caudal de água limpa.

It is a flow of clean water.

Adjective 'limpa' agrees with 'água'.

O caudal ecológico é necessário para os peixes.

The ecological flow is necessary for the fish.

Introduction of technical term 'caudal ecológico'.

Houve um caudal enorme de turistas na cidade.

There was a huge flow of tourists in the city.

Metaphorical use of 'caudal'.

O caudal médio deste rio é ideal para a pesca.

The average flow of this river is ideal for fishing.

Adjective 'médio' (average).

Precisamos de reduzir o caudal das torneiras.

We need to reduce the flow of the taps.

Infinitive 'reduzir' after 'precisamos de'.

O caudal de informações foi difícil de processar.

The flow of information was difficult to process.

Abstract use of 'caudal'.

A turbina funciona com o caudal da água.

The turbine works with the water flow.

Preposition 'com' (with).

O caudal do rio Douro é muito variável.

The flow of the Douro River is very variable.

Adjective 'variável' (variable).

O caudal de ar na mina é monitorizado.

The air flow in the mine is monitored.

Passive voice 'é monitorizado'.

O aumento do caudal provocou inundações nas zonas baixas.

The increase in flow caused floods in the low-lying areas.

Noun 'aumento' (increase) + 'do caudal'.

O caudal de ponta superou as expectativas dos engenheiros.

The peak flow exceeded the engineers' expectations.

Technical term 'caudal de ponta' (peak flow).

A gestão do caudal é vital para a agricultura local.

Flow management is vital for local agriculture.

Noun 'gestão' (management).

O caudal de investimentos estrangeiros estabilizou este trimestre.

The flow of foreign investment stabilized this quarter.

Economic context.

É fundamental manter um caudal mínimo no ecossistema.

It is fundamental to maintain a minimum flow in the ecosystem.

Adjective 'fundamental' + infinitive 'manter'.

O caudal de notícias falsas preocupa as autoridades.

The flow of fake news worries the authorities.

Social/Political context.

As variações sazonais do caudal afetam a navegação.

Seasonal variations in flow affect navigation.

Compound subject 'As variações sazonais'.

O caudal de sangue foi controlado durante a cirurgia.

The blood flow was controlled during the surgery.

Medical context.

O caudal de efluentes deve ser rigorosamente filtrado.

The flow of effluents must be rigorously filtered.

Technical term 'efluentes' (waste water).

A obra reflete um caudal de emoções contraditórias.

The work reflects a flow of contradictory emotions.

Literary/Artistic context.

O caudal de dados gerado pela rede é imenso.

The flow of data generated by the network is immense.

Technological context.

O caudal de imigrantes contribuiu para a diversidade cultural.

The flow of immigrants contributed to cultural diversity.

Sociological context.

O caudal de ar comprimido alimenta as máquinas da fábrica.

The compressed air flow powers the factory machines.

Engineering context.

O caudal literário do autor é marcado pela exuberância.

The author's literary flow is marked by exuberance.

Stylistic description.

O caudal de lava destruiu várias habitações na encosta.

The lava flow destroyed several houses on the slope.

Natural disaster context.

O caudal de oxigénio foi ajustado pelo anestesista.

The oxygen flow was adjusted by the anesthesiologist.

Specific professional context.

O caudal de erudição presente no ensaio é avassalador.

The flow of erudition present in the essay is overwhelming.

Very high-level vocabulary ('erudição', 'avassalador').

A bacia hidrográfica apresenta caudais extremamente erráticos.

The hydrographic basin presents extremely erratic flow rates.

Plural 'caudais' and technical term 'bacia hidrográfica'.

O caudal de luz que entrava pela claraboia era quase divino.

The flow of light coming through the skylight was almost divine.

Poetic/Metaphorical use of 'caudal' for light.

O caudal de capitais especulativos desestabilizou o mercado.

The flow of speculative capital destabilized the market.

Advanced economic terminology.

A retórica do político era um caudal ininterrupto de promessas.

The politician's rhetoric was an uninterrupted flow of promises.

Critical/Analytical tone.

O caudal de secreções gástricas aumenta durante a digestão.

The flow of gastric secretions increases during digestion.

High-level biological terminology.

O caudal de influências barrocas é evidente na arquitetura local.

The flow of Baroque influences is evident in the local architecture.

Art history context.

O caudal de protestos forçou o governo a recuar na decisão.

The flow of protests forced the government to back down on the decision.

Political/News context.

常见搭配

caudal médio

caudal ecológico

medir o caudal

caudal de ponta

aumento do caudal

baixo caudal

caudal de ar

caudal de sangue

caudal ininterrupto

controlar o caudal

常用短语

Caudal de informação

— A massive amount of data or news being shared.

O caudal de informação na internet é avassalador.

Caudal de gente

— A large crowd of people moving together.

Um caudal de gente invadiu o estádio.

Caudal de investimentos

— A continuous flow of money into a project or country.

O país recebeu um grande caudal de investimentos.

Caudal de sentimentos

— A rush of many different emotions at once.

Ela sentiu um caudal de sentimentos ao vê-lo.

Caudal de palavras

— Speaking a lot without stopping.

O seu discurso foi um caudal de palavras vazias.

Caudal de águas

— A poetic way to refer to the movement of water.

O caudal de águas límpidas encantou o poeta.

Caudal de luz

— A bright stream of light.

Um caudal de luz entrava pela janela.

Caudal de recursos

— A steady supply of materials or help.

O projeto precisa de um caudal de recursos constante.

Caudal de ideias

— A fast flow of creative thoughts.

Durante a reunião, surgiu um caudal de ideias novas.

Caudal de energia

— A continuous flow of power or vitality.

A criança tem um caudal de energia inesgotável.

容易混淆的词

caudal vs cauda

Means 'tail'. Often confused because of the similar spelling.

caudal vs canal

Means 'channel'. Related to water but refers to the path, not the flow rate.

caudal vs casal

Means 'couple'. Sounds slightly similar in fast speech.

习语与表达

"Seguir o caudal"

— To go with the flow or follow the majority.

Ele preferiu não discutir e apenas seguir o caudal.

informal

"Um caudal de asneiras"

— Saying a lot of stupid things in a row.

Aquele político disse um caudal de asneiras na TV.

informal

"Abrir o caudal"

— To allow something to flow freely (often secrets or money).

Finalmente, a testemunha abriu o caudal de segredos.

metaphorical

"Caudal de ouro"

— A very profitable source of income.

A nova aplicação tornou-se um caudal de ouro para a empresa.

informal

"Nadar contra o caudal"

— To go against the current or popular opinion.

É difícil nadar contra o caudal da opinião pública.

figurative

"Caudal de lágrimas"

— Crying a lot.

A notícia provocou um caudal de lágrimas em todos.

literary

"Secar o caudal"

— To stop the flow of something (usually money or resources).

A crise secou o caudal de financiamento bancário.

economic

"Caudal de vida"

— The energy or vitality of a person or place.

O mercado central é o caudal de vida da cidade.

poetic

"Perder o caudal"

— To lose momentum or importance.

O movimento de protesto começou a perder o caudal.

political

"Caudal de fogo"

— A rapid succession of shots or attacks.

Os soldados enfrentaram um caudal de fogo inimigo.

military/literary

容易混淆

caudal vs cauda

Similar spelling and shared etymology.

Cauda is the physical tail of an animal; caudal is the flow rate of a liquid.

O peixe usa a cauda para nadar no caudal do rio.

caudal vs vazão

They are synonyms.

Caudal is more common in Portugal; vazão is the standard technical term in Brazil.

Em Lisboa dizem caudal, em São Paulo dizem vazão.

caudal vs fluxo

Both describe movement.

Fluxo is the general act of flowing; caudal specifically measures the volume per time.

O fluxo de ar é bom, mas o caudal é insuficiente.

caudal vs corrente

Both relate to river movement.

Corrente is the speed and direction; caudal is the total volume.

A corrente é rápida, mas o caudal é baixo porque o rio é raso.

caudal vs volume

Both relate to quantity.

Volume is static (how much is there); caudal is dynamic (how much is passing through).

O volume da piscina é fixo, mas o caudal da mangueira varia.

句型

O caudal é [adjective].

O caudal é grande.

O caudal de [noun] aumentou.

O caudal de água aumentou.

Devido a [cause], o caudal [verb].

Devido à chuva, o caudal subiu.

É necessário [verb] o caudal para [purpose].

É necessário medir o caudal para evitar cheias.

O caudal de [abstract noun] reflete [observation].

O caudal de investimentos reflete a confiança no mercado.

Perante o caudal de [complex noun], as autoridades [action].

Perante o caudal de críticas, as autoridades recuaram.

O caudal médio é de [number].

O caudal médio é de 50 litros.

Eu vi o caudal do [river].

Eu vi o caudal do Douro.

词族

名词

caudal

动词

caudalear (rare, to flow like a river)

形容词

caudaloso (having a large flow, voluminous)

caudal (anatomical, relating to the tail)

如何使用

frequency

Common in news, science, and formal writing; rare in slang.

常见错误

A caudal → O caudal
Caudal is a masculine noun. Using a feminine article is a common gender error.
O caudal do cão → A cauda do cão
Confusing 'caudal' (flow) with 'cauda' (tail). Unless the dog is literally leaking fluid, use 'cauda'.
Os caudals → Os caudais
Incorrect pluralization. Words ending in -al change to -ais in the plural.
O caudal da piscina → O volume da piscina
Using 'caudal' for a static body of water. 'Caudal' requires movement/flow.
Caudal de trânsito → Fluxo de trânsito
While 'caudal de veículos' is possible, 'fluxo de trânsito' is the standard idiomatic expression for traffic flow.

小贴士

Gender Memory

Remember: O Caudal. Think of 'O' as a circle, like the opening of a pipe that the caudal flows through.

Synonym Choice

In Portugal, use 'caudal' for rivers. In Brazil, use 'vazão' to sound more like a local expert.

Metaphorical Power

Use 'caudal' to describe a 'flood' of emotions or information to add a more sophisticated, literary feel to your writing.

The Final L

In Portugal, the final 'l' is dark and velar. Practice by touching the back of your tongue to your soft palate.

News Watch

When it rains in Portugal, listen for the word 'caudal' on the news. It's the best way to hear it used in real-time.

Units of Measure

Caudal is usually measured in m³/s. If you see these units in a Portuguese text, the word nearby is likely 'caudal'.

Plural Rule

Always remember the plural 'caudais'. It's a common test question for intermediate Portuguese learners.

Canal Connection

Link 'Caudal' to 'Canal'. A canal is where you measure the caudal.

River Treaty

Knowing about the 'caudal' will help you understand political debates between Portugal and Spain about water rights.

The Tail End

Even though it means flow, remembering it comes from 'cauda' (tail) can help you remember the word exists, even if the meaning changed.

记住它

记忆技巧

Think of a 'Caudal' as a 'Cold Canal'. A canal has a flow of water, and 'caudal' measures that flow.

视觉联想

Imagine a giant water meter attached to the end of a river (the tail end), measuring the 'caudal'.

Word Web

Rio Água Fluxo Barragem Chuva Medição Vazão Hidrologia

挑战

Try to use 'caudal' in a sentence about your favorite river or a news story you heard recently. Bonus if you use it metaphorically!

词源

From the Latin 'caudalis', which is derived from 'cauda' (tail). Originally, it referred to things relating to the tail.

原始含义： Relating to the tail; later evolved to describe the 'tail' or trail of a flow, eventually meaning the flow itself.

Romance (Latin)

文化背景

No specific sensitivities, but be careful using it metaphorically for 'people' in sensitive political contexts (e.g., immigration) as it can sound dehumanizing if used poorly.

English speakers often just say 'flow' or 'volume'. 'Caudal' sounds more technical, like 'discharge' in hydrology.

The Albufeira Convention (Interstate water management treaty). News reports during the 'Cheias de 1967' (Great Floods of 1967). Technical manuals for the Alqueva Dam.

在生活中练习

真实语境

Weather Forecast

Aumento do caudal
Risco de cheia
Previsão de chuva
Níveis dos rios

Geography Class

Caudal médio anual
Bacia hidrográfica
Regime torrencial
Escoamento superficial

Plumbing/Home Repair

Caudal da torneira
Pressão da água
Poupar água
Redutor de caudal

Business/Finance

Caudal de capitais
Fluxo de caixa
Investimento estrangeiro
Entrada de divisas

Medical/Biology

Caudal sanguíneo
Débito cardíaco
Circulação
Veia caudal (rare)

对话开场白

"Já viste como o caudal do rio está alto depois desta tempestade?"

"Sabias que Portugal e Espanha têm acordos sobre o caudal dos rios?"

"Achas que o caudal de informação nas redes sociais é excessivo?"

"Como podemos reduzir o caudal de água nas nossas casas para poupar?"

"O que achas que provoca este grande caudal de turistas na nossa cidade?"

日记主题

Descreve um momento em que sentiste um 'caudal de emoções' difícil de controlar.

Escreve sobre a importância de preservar o caudal ecológico dos rios do teu país.

Como geres o enorme caudal de informações que recebes todos os dias no teu telemóvel?

Imagina que és um engenheiro numa barragem. Descreve o teu dia a controlar o caudal.

Reflete sobre como o 'caudal do tempo' parece mudar dependendo do que estamos a fazer.

常见问题

10 个问题

Yes, but it is less common than in Portugal. Brazilians usually prefer 'vazão' for technical flow rates and 'fluxo' for general flow. However, 'caudal' is still found in Brazilian literature and formal texts.

Yes, 'caudal de ar' is a standard term in engineering and HVAC systems to describe the volume of air moving through a duct or into a room.

It is the minimum amount of water flow required in a river to maintain the health of the ecosystem and protect the species living there, especially downstream of a dam.

It is primarily a noun (the flow). It can technically be an adjective meaning 'relating to the tail' in biology, but this is very rare in everyday language.

Like most Portuguese words ending in '-al', you drop the 'l' and add 'is'. So, one 'caudal' becomes two 'caudais'.

It is always masculine: 'o caudal'. Even when referring to water (a água), the noun 'caudal' keeps its masculine gender.

Use 'caudal' when you want to sound more precise about the volume or rate of flow. Use 'fluxo' for more general or abstract movement.

No, but you might hear 'caudal de capital', which means a 'flow of money'. The words are different, but often appear together in economic news.

Yes, in medical contexts, 'caudal sanguíneo' refers to the rate of blood flow through the vessels.

It is common in formal contexts, news, and science, but you won't hear it every day in casual street conversation unless it's raining heavily.

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