frequency of floods中文是什么意思

• 洪水出现频率

• "frequency"中文翻译    n. 1.屡次，频仍，频繁。 2.(脉搏等的)次数，出现 ...
• "flood"中文翻译    n. 1.洪水，水灾。 2.溢流，涨水，潮水最高点，泛滥 ...
• "frequency of rare floods" 中文翻译 :    稀遇洪水频率
• "floods" 中文翻译 :    洪水
• "aperiodic floods" 中文翻译 :    不定期洪水
• "be hit by floods" 中文翻译 :    遭受水灾
• "catastrophic floods" 中文翻译 :    灾难性洪水
• "prevent floods" 中文翻译 :    消弭水患
• "serious floods" 中文翻译 :    严重的水灾
• "summer floods" 中文翻译 :    夏汛
• "eliminate the scourge of floods" 中文翻译 :    根除水患
• "floods-above-base series" 中文翻译 :    洪水超准序列
• "land liable to floods" 中文翻译 :    易涝洼地
• "major causes of the floods" 中文翻译 :    洪涝灾害的原因
• "stand the test of the severest floods" 中文翻译 :    经受特大洪灾的考验
• "the floods rolled down the valley" 中文翻译 :    洪水沿山谷奔腾而下
• "the floods surged over the valley" 中文翻译 :    洪水奔腾澎湃漫过溪谷
• "the river floods caved in the bank" 中文翻译 :    河水泛滥冲塌了堤岸
• "virgin forests and floods" 中文翻译 :    原始森林与洪水
• "fight floods and provide disaster relief" 中文翻译 :    抗洪救灾
• "frequency" 中文翻译 :    n. 1.屡次，频仍，频繁。 2.(脉搏等的)次数，出现率；频度；【物理学】频率，周率。 audio frequency音频。 a high [low] frequency高[低]频。 the frequency of earthquakes in Japan 地震在日本的频繁发生。 mean [median] frequency中频。 resonance [resonant] frequency谐振频率，共振频率。 ultrahigh frequency超高频。 ultralow frequency超低频。 very high frequency甚高频。 very low frequency甚低频。
• "frequency generator frequency doubler" 中文翻译 :    频率发生器倍频器
• "frequency pushing and frequency pulling" 中文翻译 :    频率推挽
• "frequency range; frequency channel" 中文翻译 :    频段
• "frequency-modulation and voice frequency" 中文翻译 :    调频与音频

• Though the flood control engineering system improved the flood control standard and reduce the frequency of flood inundation and enlarger the protected area , but at the same time , the risk of dike broken and dam failed were added . moreover , people found that human living environment become worsen increasingly and the river ecosystem was destroyed
  然而，在与洪水斗争的过程中，人们发现虽然通过大规模的水利工程建设，提高了江河的防洪标准，减少了洪水泛滥的几率，扩大了防洪保护的范围，但同时也增加堤防、大坝溃决等的风险，而且人类发现生存环境日益恶化，河流生态系统被破坏等诸多问题。
• Abstract : this paper analyzes causal factors of flood in the middle reaches of changjiang river . due to neglection of environmental management , soil erosion in the upper and middle reaches of the changjiag river , lake sedimentation , large - scale reclamation of marshes , the flood regulation capacity of the lake was descended , and flood stage was risen and prolonged . consequently more and more river levees and lake dikes were reinforced almost every year to prevent the disasters , which made flood level go up and flood period last for more days . the frequency of flood and waterlogging disasters rose and their damage was enlarged . several proposals for flood prevention including agricultural modernization are put forward
  文摘: 1998年长江大洪水后开始实施的“平垸行洪,退田还湖”的土地利用调整方案,从长远来说应寻求农业安全且收入逐渐提高条件下的土地利用,长江中游地区应积极推进农业现代化,提高农业劳动生产率,转移,减少分蓄洪区的人口,移民建镇,对区内的土地要促进其规模经营,由优秀的有文化的农民经营,平时只有少量的直接从事农业生产的经营管理人员,农忙时则大量地使用季节性合同工或实现机械化,大洪水时退田还湖,减轻长江干流大洪水的压力,减少分洪与特大洪灾时的损失,这样还可促进避洪、冬季农业等的发展,也有利于长江中上游地区陡坡耕地的退耕还林,还可在粮食充足时进行休耕,在旱灾、粮食紧张时扩大粮食生产?