Core Knowledge Summary for Pre-U WJEC Geography | Pre-U WJEC 地理：核心知识点梳理

📚 Core Knowledge Summary for Pre-U WJEC Geography | Pre-U WJEC 地理：核心知识点梳理

The Pre-U WJEC Geography specification integrates physical and human geography, demanding a systems-thinking approach and the ability to evaluate real-world case studies. This summary distils the core knowledge across the key themes, providing a bilingual reference for revision.

Pre-U WJEC 地理大纲融合了自然与人文地理，强调系统思维以及对真实案例的评估能力。本文梳理了各核心主题的基础知识点，为中英双语复习提供参考。

1. The Water Cycle and Drainage Basin System | 水循环与流域系统

The global hydrological cycle is a closed system; water moves between major stores – oceans, ice caps, groundwater, lakes, and the atmosphere – through fluxes such as evaporation, precipitation, and runoff. At the drainage basin scale, the system is open, allowing inputs (precipitation) and outputs (evapotranspiration and river discharge). The water balance equation relates these components.

全球水循环是一个封闭系统；水在海洋、冰盖、地下水、湖泊和大气等主要储存库之间通过蒸发、降水、径流等通量进行移动。在流域尺度上该系统为开放系统，允许输入（降水）和输出（蒸发蒸腾及河流流量）。水量平衡方程将这些组分联系起来。

P = E + Q ± ΔS

where P is precipitation, E is evapotranspiration, Q is runoff, and ΔS is the change in storage. Infiltration, throughflow, and groundwater flow are key subsurface processes controlled by soil porosity and permeability. Flood hydrographs are used to compare lag time, peak discharge, and rising limb geometry between urban and rural catchments.

其中 P 为降水量，E 为蒸散发量，Q 为径流量，ΔS 为蓄水量变化。下渗、壤中流和地下水流是关键的地下过程，受土壤孔隙度和渗透性控制。洪水过程线用来比较城乡流域的滞时、洪峰流量和涨水段几何特征。

Global Water Store	全球储存库	% of Total
Oceans	海洋	96.5%
Ice caps & glaciers	冰盖与冰川	1.74%
Groundwater	地下水	1.69%
Lakes, soil moisture, atmosphere, rivers, biosphere	湖泊、土壤水、大气、河流、生物圈	0.07%

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2. The Carbon Cycle and Climate Change | 碳循环与气候变化

Carbon circulates between the atmosphere, oceans, lithosphere, and biosphere through both fast (photosynthesis, respiration, ocean-atmosphere exchange) and slow (sedimentation, fossilisation) processes. Human activities, especially fossil fuel combustion and deforestation, have increased atmospheric CO₂ from about 280 ppm to over 420 ppm since the Industrial Revolution.

碳通过快速（光合作用、呼吸作用、海气交换）和缓慢（沉积、石化）过程在大气、海洋、岩石圈和生物圈之间循环。自工业革命以来，化石燃料燃烧和森林砍伐等人类活动已使大气 CO₂ 浓度从约 280 ppm 升至 420 ppm 以上。

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

This photosynthesis equation represents carbon sequestration. Enhanced greenhouse effect disrupts the global energy budget, causing temperature rise, ice melt, and more frequent extreme weather. The ‘missing carbon sink’ and permafrost methane feedbacks are critical uncertainties in climate modelling.

该光合作用方程式代表碳的封存。增强的温室效应扰乱了全球能量收支，导致气温升高、冰雪融化以及更频繁的极端天气。”失踪碳汇”和永冻层甲烷反馈是气候模拟中的关键不确定性。

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3. Coastal Systems and Landforms | 海岸系统与地貌

Coasts are dynamic interfaces shaped by waves, tides, currents, and subaerial processes. Wave energy depends on fetch, wind speed, and duration. Constructive waves build beaches; destructive waves erode. Key erosion processes include hydraulic action, abrasion, corrosion, and attrition, producing landforms such as cliffs, wave-cut platforms, caves, arches, and stacks.

海岸是由波浪、潮汐、海流和陆上过程塑造的动态界面。波浪能量取决于风区长度、风速和风时。建设性波浪堆积海滩；破坏性波浪侵蚀。主要侵蚀过程包括水力作用、磨蚀、溶蚀和磨耗，形成悬崖、海蚀平台、海蚀洞、海蚀拱和海蚀柱等侵蚀地貌。

Deposition occurs where energy falls, leading to beaches, spits, bars, and tombolos. Longshore drift transports sediment parallel to the coast. Human intervention (groynes, sea walls) often disrupts sediment cells, causing erosion downdrift. Case studies such as Holderness Coast (rapid erosion) and the Severn Estuary (tidal range) illustrate these dynamics.

沉积发生在能量降低处，形成海滩、沙嘴、沙坝和连岛沙洲。沿岸漂流使沉积物平行于海岸搬运。人类干预（丁坝、海堤）常破坏沉积物单元，导致下游侵蚀。Holderness 海岸快速侵蚀和 Severn 河口潮差等案例体现了这些动态。

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4. Glacial and Periglacial Landscapes | 冰川与冰缘景观

Glaciers move via basal sliding and internal deformation, eroding through plucking and abrasion. Corries, glacial troughs (U-shaped valleys), hanging valleys, and roches moutonnees are characteristic erosional landforms. Depositional features include moraines (terminal, lateral, medial), drumlins, and erratics.

冰川通过底部滑动和内部变形运动，以拔蚀和磨蚀进行侵蚀。冰斗、U 形谷、悬谷和羊背石是典型的冰蚀地貌。堆积地貌包括各类冰碛（终碛、侧碛、中碛）、鼓丘和漂砾。

Periglacial environments experience intense frost action, producing patterned ground, ice wedges, and pingos. Permafrost, solifluction, and thermokarst processes dominate. Meltwater channels and outwash plains (sandur) are prominent fluvioglacial features. Understanding these landscapes is essential for reconstructing past Quaternary environments.

冰缘环境经历强烈的冻融作用，形成图案石质地面、冰楔和冰核丘。永久冻土、融冻泥流和热喀斯特过程占主导。融水河道和冰水冲积平原是突出的冰水地貌。理解这些景观对重建第四纪环境至关重要。

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5. Population Dynamics and Migration | 人口动态与迁移

The Demographic Transition Model (DTM) describes historical population change through high stationary, early expanding, late expanding, low stationary, and possible fifth (decline) stages. Crude birth rate (CBR), crude death rate (CDR), and fertility rate (TFR) are key metrics. Population pyramids reflect age-sex structure and can indicate stage of development.

人口转变模型通过高位静止、早期扩张、晚期扩张、低位静止及可能的第五阶段（衰退）描述人口变化。粗出生率、粗死亡率和总和生育率是关键指标。人口金字塔反映年龄性别结构，并可指示发展阶段。

Migration is driven by push and pull factors; Lee’s model highlights intervening obstacles. Forced migration, refugee movements, and internal displacement caused by conflict or environmental change are critical contemporary issues. Dependency ratios and demographic dividend have significant implications for economic planning and social welfare provision.

迁移受推拉因素驱动；Lee 模型强调中间障碍。冲突或环境变化引发的被迫迁移、难民流动和境内流离失所是重要的当代议题。负担系数和人口红利对经济规划与社会福利供给有重大影响。

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6. Urbanisation and Urban Challenges | 城市化与城市挑战

Urbanisation trends vary globally: most developed nations are highly urbanised and experiencing counter-urbanisation or re-urbanisation, while many developing countries are in the rapid urbanisation phase, leading to megacity growth. The urban land use models (Burgess, Hoyt, Harris-Ullman) help explain spatial structures, though they require adaptation for post-industrial and global south contexts.

城市化趋势全球各异：多数发达国家高度城市化且经历逆城市化或再城市化，而许多发展中国家处于快速城市化阶段，促成巨型城市增长。城市土地利用模型（伯吉斯、霍伊特、哈里斯-厄尔曼）有助于解释空间结构，但需要针对后工业社会和全球南方进行修正。

Urban challenges include housing, transport congestion, air pollution, social segregation, and informal settlements. Sustainable urban solutions range from green infrastructure and urban greening to transit-oriented development and smart city technologies. Case studies such as London’s regeneration and Mumbai’s Dharavi redevelopment offer contrasting insights.

城市挑战包括住房、交通拥堵、空气污染、社会隔离和非正规住区。可持续城市解决方案涵盖绿色基础设施、城市绿化、公交导向型开发以及智慧城市技术。伦敦城市更新和孟买达拉维再开发等案例提供了对比视角。

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7. Global Development and Inequality | 全球发展与不平等

Development is a multidimensional concept measured by economic indicators (GDP per capita, GNI) and composite indices such as the Human Development Index (HDI) and Inequality-adjusted HDI (IHDI). The Brandt Line divides the ‘Global North’ and ‘Global South’, but the binary classification is blurred by emerging economies and regional disparities within countries.

发展是一个多维概念，通过人均 GDP、GNI 等经济指标以及人类发展指数 HDI 和不平等调整后人类发展指数 IHDI 等综合指数衡量。勃兰特线划分了”全球北方”和”全球南方”，但新兴经济体和一国内部的地区差异模糊了这种二元分类。

Modernisation theory, dependency theory, and world-systems theory offer competing explanations for global inequality. The UN Sustainable Development Goals (SDGs) provide a framework for addressing poverty, health, education, gender equality, and climate action, while acknowledging the debt and trade constraints faced by the least developed countries.

现代化理论、依附论和世界体系理论为全球不平等提供了不同解释。联合国可持续发展目标为处理贫困、健康、教育、性别平等和气候行动提供了框架，同时承认最不发达国家面临的债务与贸易制约。

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8. Globalisation and Global Governance | 全球化与全球治理

Globalisation refers to the increasing interconnectedness of economies, cultures, and political systems, driven by trade liberalisation, technological advances, and transnational corporations (TNCs). Flows of capital, labour, information, and goods have intensified, creating a ‘shrinking world’ effect. However, it has also produced uneven development and cultural homogenisation anxieties.

全球化指经济、文化和政治体系日益紧密的联系，由贸易自由化、技术进步和跨国公司驱动。资本、劳动力、信息和商品流动加剧，产生了”时空压缩”效应。但它也带来了不均衡发展和文化同质化的担忧。

Global governance involves institutions like the UN, WTO, IMF, and World Bank, which set rules and norms, but face criticism over democratic deficit and ‘Washington Consensus’ policies. Climate change agreements (Paris Accord) and trade blocs (EU, ASEAN) illustrate attempts to manage shared problems. Protectionist trends and anti-globalisation movements challenge the neoliberal consensus.

全球治理涉及联合国、WTO、IMF 和世界银行等机构，它们制定规则与规范，但因民主赤字和”华盛顿共识”政策受到批评。气候变化协定（巴黎协定）和贸易集团（欧盟、东盟）体现了管理共同问题的努力。保护主义倾向和反全球化运动对新自由主义共识构成挑战。

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9. Hazardous Earth and Risk Management | 灾害地球与风险管理

Tectonic hazards (earthquakes, volcanoes, tsunamis) are concentrated along plate boundaries: divergent, convergent (subduction and collision), and conservative. The magnitude-frequency relationship and the concept of ‘multiple hazard zones’ (e.g., Philippines) are crucial for understanding disaster risk. Volcanic hazards include lava flows, pyroclastic flows, lahars, and ash fall.

构造灾害（地震、火山、海啸）集中于板块边界：离散型、汇聚型（俯冲和碰撞）和保守型。震级-频率关系以及”多灾种区”（如菲律宾）的概念对理解灾害风险至关重要。火山灾害包括熔岩流、火山碎屑流、火山泥流和火山灰降落。

Risk = (Hazard × Vulnerability) / Capacity. Disaster management cycle involves mitigation, preparedness, response, and recovery. Case studies like the 2011 Tohoku earthquake and tsunami or the 2010 Eyjafjallajokull eruption illustrate differing levels of resilience, monitoring, and warning systems. Climate-related hazards (tropical cyclones, droughts) are increasingly linked to anthropogenic warming.

风险 = (致灾因子 × 脆弱性) / 应对能力。灾害管理周期包括减灾、备灾、响应和恢复。2011 年东日本大地震和海啸或 2010 年 Eyjafjallajokull 火山喷发等案例研究体现了不同的韧性、监测和预警系统水平。气候相关灾害（热带气旋、干旱）正日益与人为变暖相联系。

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10. Weather, Climate and Atmospheric Processes | 天气、气候与大气过程

The atmosphere is structured into troposphere, stratosphere, mesosphere, thermosphere; weather occurs mainly in the troposphere. Global atmospheric circulation – Hadley, Ferrel, and Polar cells – drives surface wind belts and pressure zones (e.g., subtropical high, ITCZ). The Coriolis force and jet streams influence weather systems and storm tracks.

大气分为对流层、平流层、中间层和热层；天气主要发生在对流层。全球大气环流——哈得莱环流、费雷尔环流和极地环流——驱动地面风带和气压带（如副热带高压、热带辐合带 ITCZ）。科里奥利力和急流影响天气系统和风暴路径。

Mid-latitude depressions form along the polar front, bringing unsettled weather, while anticyclones produce stable, dry conditions. Tropical cyclones derive energy from warm ocean water (>26.5°C) and have distinct eye, eyewall, and rain bands. Climate classification (Koppen) and microclimates are influenced by latitude, altitude, aspect, and ocean currents.

中纬度低压沿极锋形成，带来不稳定天气，而反气旋产生稳定干燥的条件。热带气旋从>26.5°C的暖海水中获取能量，具有清晰的台风眼、眼壁和螺旋雨带。气候分类和微气候受纬度、海拔、坡向和洋流影响。

Published by TutorHao | Geography Revision Series | aleveler.com

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