地理漫步·世界地理英语30篇（6）
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Coastlines Change Constantly: Erosion, Accretion, and Human Response
海岸线持续变化：侵蚀、堆积与人类应对
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Waves, tides, wind, and currents constantly reshape coastlines—sometimes eroding cliffs, sometimes building beaches.海浪、潮汐、风和洋流持续重塑海岸线——有时侵蚀悬崖，有时堆积海滩。
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Sea-level rise accelerates erosion, especially where hard seawalls reflect wave energy and starve downdrift beaches.海平面上升加剧侵蚀，尤其在硬质海堤反射波浪能量并导致下游海滩缺乏泥沙补给的地区。
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The Netherlands protects 60% of its land below sea level using dikes, pumps, and dynamic sand nourishment projects.荷兰通过堤坝、水泵和动态沙滩补沙工程，保护其60%低于海平面的土地。
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Louisiana loses a football field of wetland every 100 minutes due to levee systems that cut off sediment replenishment.路易斯安那州因防洪堤系统切断泥沙补给，每100分钟就丧失一个足球场大小的湿地。
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Mangrove forests along tropical coasts absorb storm energy, trap sediment, and nurture juvenile fish populations.热带沿海的红树林能吸收风暴能量、滞留泥沙，并为幼鱼提供栖息地。
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Managed retreat—moving buildings inland—is becoming a realistic option for communities facing chronic flooding.有计划的退缩——将建筑向内陆迁移——正成为面临长期洪涝社区的现实选择。
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Satellite radar measurements track millimeter-scale coastline shifts, helping planners prioritize protection efforts.卫星雷达测量可追踪毫米级的海岸线变化，助力规划者优先部署防护措施。
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Tourist resorts often import sand to widen beaches, but these ‘nourishments’ rarely last more than a few seasons.旅游度假村常进口沙子拓宽海滩，但这类‘补沙’通常维持不了几个季节。
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Natural solutions like dune restoration and oyster reef construction offer cheaper, longer-lasting coastal defense.恢复沙丘、建造牡蛎礁等自然方案，成本更低、防护效果更持久。
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Adapting to moving shorelines means accepting change—not resisting it—and designing flexible, reversible infrastructure.适应不断移动的海岸线，意味着接受变化而非抗拒，并设计灵活、可逆的基础设施。