Runoff is when water from rain or melting snow moves over the land and does not go into the ground. It can flow into rivers or lakes. Also, a runoff can be a special election. This happens if no one wins enough votes in the first election. So, they have another vote to decide the winner.
Runoff has a couple of meanings, both related to things flowing or continuing. Firstly, it describes water that flows over the land, often after rain or melted snow, instead of being absorbed into the earth. Think of water running down a street or a hillside.
Secondly, runoff can refer to a special election or competition. This happens if, in the first round, no one wins by a clear majority. So, people have to vote or compete again to decide a winner.
Runoff, at a C1 level, encompasses two distinct yet equally significant phenomena. Firstly, in an environmental context, it denotes the surplus water from precipitation or thawed snow that traverses the land rather than infiltrating the soil, often contributing to erosion or replenishment of water bodies.
Secondly, within political or competitive spheres, a runoff signifies a subsequent decisive contest. This occurs when an initial round fails to produce a definitive winner due to a lack of an absolute majority, necessitating an additional stage to determine the victor.
§ Understanding the Two Meanings of 'Runoff'
The word 'runoff' has two distinct meanings, and confusing them is a common mistake. Let's break them down:
- DEFINITION
- Runoff (Environmental): Water from rain or melted snow that flows over the land surface instead of soaking into the ground.
- DEFINITION
- Runoff (Electoral/Competitive): An additional election or competition held when no candidate or participant has achieved a clear majority or victory.
The key to avoiding confusion is context. Are you talking about weather and water, or elections and sports?
§ Mistake 1: Using 'Runoff' for General Water Flow
Sometimes learners use 'runoff' to describe any kind of water flowing, even if it's contained or part of a river. Remember, the environmental meaning specifically refers to water flowing *over the land surface* that *has not soaked in*.
Incorrect: The river has a lot of runoff today.
Correct: Heavy rains caused significant runoff in the hilly areas, leading to flash floods.
§ Mistake 2: Confusing 'Runoff' with a Primary Election
An election 'runoff' is not the same as a primary election or an initial round of voting. A runoff only happens *after* an initial vote if no one achieved the required majority. It's a second chance, not the first.
Incorrect: The candidates are preparing for the runoff next month, which is the first vote.
Correct: Since no candidate won more than 50% of the vote, a runoff election will be held between the top two contenders.
§ Mistake 3: Misusing 'Runoff' as a Verb
'Runoff' is a noun. You cannot use it as a verb. For example, water doesn't 'runoff' the land; it 'runs off' the land (where 'runs off' is a phrasal verb).
- Incorrect: The water will runoff the pavement.
- Correct: The water will run off the pavement.
§ General Tip: Pay Attention to the Surrounding Words
The words around 'runoff' will almost always give you a clue as to which meaning is intended. Look for terms related to weather, water, geology for the environmental meaning, and terms like 'election', 'vote', 'candidate', 'majority' for the competitive meaning.
- Environmental context: 'rain', 'snow', 'soil', 'erosion', 'pollution'
- Competitive context: 'ballot', 'campaign', 'winner', 'second round'
§ Understanding the Nuances of Runoff
The word "runoff" carries two distinct meanings, one related to hydrology and the other to electoral processes. Understanding the context is crucial when choosing "runoff" or a similar word. Let's delve into these two senses and explore their alternatives.
§ Hydrological Runoff: Water Flowing Over Land
In its hydrological sense, "runoff" describes the water that flows over the Earth's surface, whether from rain, melted snow, or irrigation, that doesn't infiltrate the ground or evaporate. It's a key component of the water cycle and plays a significant role in erosion, flooding, and water pollution.
- DEFINITION
- Water from rain or melted snow that flows over the land surface instead of soaking into the ground.
Heavy rainfall led to significant runoff, causing localized flooding in low-lying areas.
Similar words and when to use them:
- Surface water: This is a broader term that includes all water on the surface of the Earth, such as rivers, lakes, and oceans, as well as runoff. You would use "surface water" if you're referring to water on the surface generally, not specifically the flowing action of excess water.
- Overflow: While "overflow" can describe water spilling over boundaries, it doesn't carry the same technical precision as "runoff" in a hydrological context. "Overflow" is more general and can apply to any liquid exceeding its container's capacity. For example, a bathtub might overflow, but we wouldn't typically call that "runoff."
- Drainage: This term refers to the natural or artificial removal of water from a surface or area. Runoff is a type of natural drainage. "Drainage" can also refer to systems designed to remove water, like drainage pipes or ditches.
- Effluent: This term usually refers to liquid waste or sewage discharged into a river or the sea. While it's water flowing, it specifically implies a discharge, often with pollutants, which isn't the primary focus of "runoff."
§ Electoral Runoff: A Deciding Competition
In the political or competitive sense, a "runoff" is an additional contest held to determine a winner when no single candidate or participant secures an absolute majority in the initial round. This ensures that the eventual winner has the support of a significant portion of the electorate or participants.
- DEFINITION
- An additional election or competition held when no candidate or participant has achieved a clear majority or victory.
The mayoral election will proceed to a runoff next month as no candidate secured over 50% of the vote.
Similar words and when to use them:
- Second round: This is a very close synonym and can often be used interchangeably with "runoff" in the electoral context. "Runoff" often implies a specific type of second round where the weakest candidates are eliminated.
- Playoff: In sports, a "playoff" is a series of games or matches played to determine a champion. While similar in purpose to a runoff (deciding a winner), "playoff" specifically refers to a series, whereas a "runoff" is typically a single additional election or competition.
- Tie-breaker: A "tie-breaker" is a method used to decide a winner when there is a tie. While a runoff election essentially breaks a tie in terms of majority, the term "tie-breaker" is often used for simpler, immediate resolutions like an extra question in a quiz or an additional round in a game. A runoff is a more formal and involved process.
- Decisive vote/election: These terms emphasize the outcome rather than the process itself. While a runoff is a decisive election, using "decisive election" might not convey the specific mechanism of an additional round due to a lack of initial majority.
§ Choosing the Right Word
The key to using "runoff" correctly, and differentiating it from similar terms, lies in understanding the context. If you are talking about water flowing over land, especially in an environmental or geographical context, "runoff" is precise. If you are discussing a follow-up election or competition to determine a clear winner, "runoff" is also the most accurate term. Be mindful of the distinct meanings to avoid ambiguity.
按水平分级的例句
The heavy rainfall led to significant runoff, causing localized flooding in the streets.
La fuerte lluvia provocó una escorrentía significativa, causando inundaciones localizadas en las calles.
Here, 'runoff' is used as an uncountable noun, referring to the water itself.
Farmers are concerned about agricultural runoff carrying pesticides into nearby rivers.
A los agricultores les preocupa que la escorrentía agrícola arrastre pesticidas a los ríos cercanos.
This usage emphasizes the source of the runoff ('agricultural') and its impact.
After the initial election, a runoff was scheduled between the two leading candidates.
Después de la elección inicial, se programó una segunda vuelta entre los dos candidatos principales.
In this context, 'runoff' refers to a specific type of election, a countable noun.
The environmental agency is working to reduce urban runoff pollution.
La agencia ambiental está trabajando para reducir la contaminación por escorrentía urbana.
Similar to the second example, 'urban runoff' specifies the origin of the runoff.
Neither contender secured enough votes, so a runoff will be necessary to determine the winner.
Ninguno de los contendientes obtuvo suficientes votos, por lo que será necesaria una segunda vuelta para determinar el ganador.
This sentence clearly illustrates the condition for a runoff election.
Controlling stormwater runoff is crucial for preventing erosion and protecting water quality.
Controlar la escorrentía de aguas pluviales es crucial para prevenir la erosión y proteger la calidad del agua.
'Stormwater runoff' is a common collocation describing water from storms.
The close results of the first round necessitated a runoff in the presidential race.
Los resultados ajustados de la primera ronda hicieron necesaria una segunda vuelta en la carrera presidencial.
Here, 'runoff' is an uncountable noun in the context of an election.
They implemented new drainage systems to manage the runoff from melting snow effectively.
Implementaron nuevos sistemas de drenaje para gestionar eficazmente la escorrentía de la nieve derretida.
This example uses 'runoff' to describe the water from melted snow.
The heavy rainfall led to significant runoff, causing localized flooding in the urban areas.
Heavy rain caused a lot of water to flow over the ground, leading to floods.
Here, 'runoff' is used as an uncountable noun referring to water.
Agricultural runoff containing pesticides can contaminate rivers and harm aquatic ecosystems.
Water flowing from farms with pesticides can pollute rivers and hurt fish and plants.
Still referring to water, 'agricultural runoff' specifies its source.
To prevent erosion, engineers designed a system to manage stormwater runoff efficiently.
Engineers created a system to control rainwater flowing off surfaces to stop soil from washing away.
'Stormwater runoff' is another common collocation, also used as an uncountable noun.
The mayoral election resulted in a runoff between the two leading candidates, as neither secured over 50% of the vote.
Because no one won more than half the votes, the mayoral election will have a second vote between the top two.
Here, 'runoff' is a countable noun referring to a second election.
Analysts predict a runoff election will be necessary if the current polls accurately reflect voter sentiment.
Experts think a second election will be needed if the current opinions of voters are correct.
Similar to the previous example, 'runoff election' is a common phrase.
The company faced a runoff of talent after the merger, as many key employees decided to leave.
After the companies combined, many important employees left, leading to a loss of skilled people.
This is a more metaphorical use, implying a depletion or loss, similar to water flowing away.
Environmental regulations aim to minimize industrial runoff into natural waterways.
Rules about the environment try to reduce the amount of water flowing from factories into rivers and lakes.
'Industrial runoff' is another specific type of runoff, used as an uncountable noun.
The first round of the competition ended inconclusively, necessitating a runoff to determine the ultimate winner.
The first part of the contest didn't have a clear winner, so they need another round to decide who won.
Here, 'runoff' refers to a supplementary round in a competition, used as a countable noun.
The heavy rainfall led to significant agricultural runoff, carrying pesticides and fertilizers into nearby rivers and contaminating the water supply.
Heavy rain causing farm chemicals to enter rivers.
Here, 'runoff' is used as an uncountable noun, referring to the process or substance itself. 'Agricultural runoff' is a common collocation.
Environmental agencies are implementing new regulations to mitigate urban runoff, which often contains pollutants like oil, grease, and heavy metals from roads and industrial areas.
Rules to reduce city pollution flowing into water from streets.
Similar to the previous example, 'urban runoff' functions as an uncountable noun. 'Mitigate' is a C2-level verb meaning to make less severe.
After a fiercely contested election where no candidate secured over 50% of the vote, a runoff was scheduled between the top two contenders.
Second election needed because no one won outright.
In this context, 'runoff' is a countable noun referring to the election itself. 'Fiercely contested' is a strong collocation describing intense competition.
The electoral system stipulated that if no candidate achieved an absolute majority in the first round, a runoff election would be held two weeks later.
Rules said a second vote happens if no one wins first time.
'Runoff election' is a very common collocation. 'Stipulated' is a C2-level verb meaning to demand or specify as a condition.
The engineer explained that proper drainage systems are crucial to manage storm runoff effectively, preventing flooding and erosion.
Good drains are key to handling storm water and stopping floods.
'Storm runoff' is another common collocation. 'Crucial' means extremely important, and 'effectively' modifies 'manage'.
Despite initial predictions, the first round of voting was inconclusive, necessitating a runoff to determine the definitive winner of the presidential race.
First vote wasn't clear, so a second one is needed to pick president.
'Necessitating' is a C2-level verb meaning making something necessary. 'Inconclusive' means not leading to a firm conclusion.
The geological survey highlighted the impact of surface runoff on soil degradation, particularly in deforested areas where vegetation no longer holds the soil in place.
Study showed how water flowing over ground ruins soil, especially where trees are cut.
'Surface runoff' is a specific type of runoff. 'Soil degradation' is a C2-level term for the deterioration of soil quality. 'Particularly' is used for emphasis.
The municipal council debated the best strategy for handling the runoff from the recently developed industrial park, concerned about potential environmental hazards.
City discussed how to deal with water flowing from new factories, worried about pollution.
'Municipal council' refers to a local government body. 'Debated' implies a formal discussion. 'Environmental hazards' is a C2-level collocation.
常见搭配
常用短语
runoff into rivers
prevent runoff pollution
deal with runoff
a second runoff
force a runoff
runoff of water
runoff from fields
runoff from melting snow
runoff from farms
runoff from heavy rain
如何使用
Usage Notes:
Runoff (Hydrology):
- Typically used in the context of environmental science, geography, and urban planning.
- Can be qualified with adjectives like "stormwater runoff," "agricultural runoff," or "surface runoff."
- Often associated with issues like flooding, erosion, and water pollution.
Runoff (Elections/Competitions):
- Used in political science, sports, and other competitive fields.
- Often followed by a phrase indicating the purpose, e.g., "a runoff election," "a runoff vote."
- Implies that the initial round did not produce a decisive winner.
Common Mistakes:
1. Confusing the two meanings without context:
- Without proper context, it can be unclear whether "runoff" refers to water or an election. For example, a sentence like "The runoff was heavy" could be ambiguous.
- Correction: Always provide sufficient context. For water, specify what kind of runoff (e.g., "The stormwater runoff caused flooding"). For elections, specify "runoff election" or similar.
2. Incorrectly using "run-off" as a verb:
- "Runoff" is a noun. The verb form is "run off" (two words).
- Incorrect: "The water runoffs the street."
- Correct: "The water runs off the street."
3. Using "runoff" to describe a general overflowing or escaping:
- While related to water flowing, "runoff" specifically refers to water that flows over land rather than soaking in, or an additional contest. It's not a general term for anything that overflows.
- Incorrect: "The coffee runoff from the cup."
- Correct: "The coffee overflowed from the cup."
自我测试 66 个问题
The rain caused a lot of ___ in the streets.
Runoff is water that flows over the land after rain.
After the election, there was a ___ because no one won clearly.
A runoff election happens when there is no clear winner the first time.
The water from the melted snow created a small ___.
Melted snow can create runoff as it flows over the ground.
We need another vote, a ___, to choose the winner.
A runoff is a second vote or competition when there is no clear winner initially.
Too much rain can cause dangerous ___ on the roads.
Heavy rain leads to runoff, which can make roads dangerous.
The two teams had a ___ to decide the champion.
A runoff can also be a competition to decide a winner if there was no clear victory before.
After the heavy rain, there was a lot of water ___ in the streets.
Runoff refers to water from rain that flows over the land surface.
The ___ from the melted snow went into the river.
Runoff refers to water from melted snow that flows over the land surface.
If no one wins the first vote, there will be a ___ election.
A runoff is an additional election held when no candidate has a clear victory.
The fields were wet because of the rain ___.
Runoff describes water from rain that flows over the land surface.
They need a ___ competition to decide the winner.
A runoff is an additional competition held when no participant has a clear victory.
The dirty water ___ from the streets goes into the storm drains.
Runoff describes water from rain or melted snow that flows over the land surface.
Think about water flowing.
Think about another vote.
Think about environmental impact.
Read this aloud:
The runoff from the melting snow filled the ditch.
Focus: runoff, melting, filled
你说的：
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Read this aloud:
There will be a runoff next month for the mayor's office.
Focus: runoff, next month, mayor's
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Read this aloud:
Too much runoff can cause flooding.
Focus: too much, runoff, flooding
你说的：
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This sentence describes how rainwater flowing over the surface led to flooding.
This sentence uses 'runoff' in the context of an election where no clear winner emerged, necessitating another round.
This sentence explains that water flowing from farms can carry pollutants into rivers.
After a heavy storm, the _________ carried a lot of soil into the river, making the water muddy.
Runoff refers to the water that flows over the land surface after rain or melted snow, carrying sediment with it.
In the election, no candidate won more than half of the votes, so they had to hold a _________ to decide the winner.
A runoff election is held when no candidate achieves a clear majority in the first round of voting.
Farmers are concerned about agricultural _________ because it can carry pesticides and fertilizers into local water sources.
Agricultural runoff is water that flows from farmed fields, often containing chemicals that can pollute water.
When snow melts quickly, the resulting water that flows over the land is called runoff.
Runoff is indeed water from rain or melted snow that flows over the land surface.
A runoff election is held when a candidate wins with a clear majority of votes.
A runoff election is held when no candidate has achieved a clear majority, meaning they did not win with more than half the votes.
Building more paved surfaces in a city helps to reduce the amount of runoff.
Paved surfaces prevent water from soaking into the ground, which actually increases runoff.
This sentence describes how heavy rain led to a large amount of surface water flow.
This sentence illustrates the political meaning of 'runoff' as an additional election.
This sentence shows the environmental context of 'runoff' and the need to control it.
The heavy rains led to significant agricultural land being affected by surface ____.
Runoff refers to the water that flows over land, often carrying away topsoil, which aligns with the context of agricultural land being affected by heavy rains.
Since neither candidate secured a majority, the election will proceed to a ____ next month.
A runoff election is held when no candidate wins an absolute majority in the first round, which is consistent with the sentence's context.
Environmentalists are concerned about the chemical ____ from farms polluting local rivers.
Chemical runoff from farms refers to pesticides and fertilizers carried by water flowing over the land, polluting rivers. This fits the environmental concern described.
The final decision on the new leader will depend on the results of the second-round ____.
A second-round runoff is common in elections or competitions when an initial clear winner is not determined, fitting the context of deciding a new leader.
To prevent soil ____, farmers are advised to implement contour plowing and terracing.
Contour plowing and terracing are methods used to reduce water runoff, which in turn helps prevent soil erosion. While 'erosion' is also related, 'runoff' is the direct action being managed by these techniques.
The close scores necessitated a sudden-death ____ to determine the ultimate champion.
In sports or competitions, a 'sudden-death runoff' is a tie-breaker or additional competition to decide a winner when there's no clear victor initially. 'Playoff' is similar, but 'runoff' also specifically describes this scenario.
This sentence describes one meaning of 'runoff' in a political context.
This sentence illustrates the hydrological meaning of 'runoff'.
This sentence uses 'runoff' in the context of environmental pollution.
The unprecedented rainfall led to significant ___ in the urban areas, overwhelming the drainage systems.
Runoff refers to excess water flowing over the land, which is consistent with overwhelming drainage systems during heavy rainfall.
Despite a strong showing, neither candidate secured an outright majority, necessitating a ___ election.
A runoff election is held when no candidate achieves a clear majority in the initial vote.
Environmental regulations are being tightened to mitigate the harmful effects of agricultural ___ on local waterways.
Agricultural runoff often contains pollutants that can harm waterways, making mitigation efforts necessary.
In an electoral system requiring a clear majority, a runoff election is typically avoided if the leading candidate has a plurality of votes.
A runoff election is precisely what is triggered when no candidate achieves a clear majority, even if one has a plurality.
Increased impervious surfaces, such as paved roads and rooftops, generally decrease the volume of stormwater runoff.
Impervious surfaces prevent water from soaking into the ground, thereby increasing the volume of stormwater runoff.
The term 'runoff' can describe both the flow of water and a type of follow-up competition.
The definition provided states that 'runoff' refers to both water flow and an additional election or competition.
The unprecedented volume of glacial meltwater created significant ___ in the valleys, overwhelming the existing drainage systems.
The context of 'glacial meltwater' and 'overwhelming drainage systems' clearly points to a large quantity of flowing water, which is precisely what 'runoff' refers to.
Despite a vigorous campaign, neither candidate secured an outright majority, necessitating a ___ election to determine the eventual victor.
The phrase 'neither candidate secured an outright majority' is the defining characteristic of a runoff election, where a second round of voting is held.
Ecologists are increasingly concerned about the agricultural ___ laden with pesticides and fertilizers, polluting downstream aquatic ecosystems.
The description of water 'laden with pesticides and fertilizers' flowing from 'agricultural' areas directly corresponds to the definition of agricultural runoff.
The initial primary election proved inconclusive, as no contender managed to garner the requisite 50% of the vote, thus triggering a ___ between the top two candidates.
The scenario where 'no contender managed to garner the requisite 50% of the vote' and a subsequent competition between the top two candidates perfectly describes a 'runoff'.
To mitigate the devastating effects of urban ___, city planners implemented permeable pavements and extensive green infrastructure projects.
The context of 'urban' areas and measures like 'permeable pavements and extensive green infrastructure' are typical solutions for managing 'urban runoff'.
Following a deadlock in the first round of voting, the electoral commission scheduled a second-round ___ to decide the mayoral race.
A 'deadlock in the first round of voting' that necessitates a 'second-round' to 'decide the mayoral race' is the exact definition of a 'runoff' election.
Focus on the environmental context.
Consider the political implications.
Think about environmental protection.
Read this aloud:
Discuss the socio-economic ramifications of severe urban runoff in densely populated areas.
Focus: socio-economic, ramifications, densely
你说的：
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Read this aloud:
Explain how electoral systems might be modified to minimize the frequency of runoff elections while ensuring fair representation.
Focus: electoral, minimize, frequency, representation
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Read this aloud:
Analyze the long-term ecological impact of industrial runoff on biodiversity and ecosystem resilience.
Focus: ecological, industrial, biodiversity, resilience
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/ 66 correct
Perfect score!
