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Victoria Lake Level Fluctuations and Hydropower Reliability
维多利亚湖水位波动与水电可靠性
精读先不看文字,完整听一遍。
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Lake Victoria’s surface level fluctuates up to 2.5 meters annually due to equatorial rainfall variability and evaporation rates.维多利亚湖水位因赤道降雨变化和蒸发量差异,每年波动可达2.5米。
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The Nile’s outflow at Jinja is regulated by two dams whose power generation depends directly on lake-level height and flow volume.尼罗河在金贾的出流量由两座大坝调控,其发电量直接受湖水位高度和径流量影响。
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During prolonged droughts, low water levels reduce turbine efficiency and force Uganda and Kenya to import expensive thermal electricity.持续干旱导致水位偏低,降低水轮机效率,迫使乌干达和肯尼亚进口昂贵的火电。
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Conversely, heavy rains raise lake levels beyond safe thresholds, increasing spillway discharge and wasting potential hydropower.相反,强降雨推高湖水位超过安全阈值,加大溢洪道泄水量,浪费潜在水电资源。
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Upstream land-use change in Rwanda and Tanzania accelerates sediment delivery, gradually reducing the lake’s storage capacity over decades.卢旺达和坦桑尼亚上游土地利用变化加快泥沙输入,数十年来逐步削弱湖泊蓄水能力。
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Rainfall patterns are shifting: long dry spells now alternate with intense short bursts, challenging seasonal forecasting models.降雨模式正在改变:长期干旱与短时强降雨交替出现,挑战季节性预报模型。
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Kenya’s 200-megawatt Gitaru Dam relies on consistent inflow from Victoria via the Nzoia and Yala rivers.肯尼亚200兆瓦的吉塔鲁大坝依赖维多利亚湖经佐亚河和亚拉河提供的稳定来水。
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Aquatic weeds like water hyacinth thrive during low-flow periods, clogging intakes and raising maintenance costs for hydro facilities.低流量期水葫芦等水生杂草滋生,堵塞取水口,抬高水电设施运维成本。
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Regional power pools share real-time lake-level data, yet national dispatch decisions still prioritize local demand over basin-wide optimization.区域电力联营体共享实时湖水位数据,但各国调度决策仍优先满足本地需求,而非全流域优化。
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Scientists monitor groundwater recharge beneath the lake’s volcanic rim to assess long-term aquifer contributions to baseflow stability.科学家监测湖周火山岩环下的地下水补给,以评估含水层对基流稳定的长期贡献。
精读 · 大约 10 分钟
听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。
③ 学 · 重点表达
- Conversely, heavy rains raise lake levels beyond safe thresholds, increasing spillway discharge and wasting potential hydropower. 相反,强降雨推高湖水位超过安全阈值,加大溢洪道泄水量,浪费潜在水电资源。
- Kenya’s 200-megawatt Gitaru Dam relies on consistent inflow from Victoria via the Nzoia and Yala rivers. 肯尼亚200兆瓦的吉塔鲁大坝依赖维多利亚湖经佐亚河和亚拉河提供的稳定来水。
- Lake Victoria’s surface level fluctuates up to 2.5 meters annually due to equatorial rainfall variability and evaporation rates. 维多利亚湖水位因赤道降雨变化和蒸发量差异,每年波动可达2.5米。
④ 懂 · 选一选
⑤ 今天会说这一句
Conversely, heavy rains raise lake levels beyond safe thresholds, increasing spillway discharge and wasting potential hydropower.
⑥ 跟读并录音
Conversely, heavy rains raise lake levels beyond safe thresholds, increasing spillway discharge and wasting potential hydropower.
第一版:录下来、回听、再听标准音。系统打分以后再加。
⑦ 说 · 自己来一句
用今天的表达,自己说一句。
例子:Conversely, heavy rains raise lake levels beyond safe thresholds, increasing spillway discharge and wasting potential hydropower.
已记下。连续天数以后会显示在课表里。
陈老师指导
课程开发中,敬请期待。成人和孩子都可以先自学听读、精读。
这边的讲解音轨还在做。想先跟着老师走完固定 30 课,可以去陈老师带读社(和自学通行不是同一份会员)。
课程开发中,敬请期待。