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海河防洪
释义
海河防洪
Encyclopedia
工学
〔主要江河防洪〕
释
Haihe River flood control
海河防洪
海河流域西以山西高原与黄河流域接界,北以内蒙古高原与内陆河流域为邻,南界黄河,东临渤海,总面积32.06万平方千米。海河流域包含海河、滦河、徒骇马颊河三大水系,其中海河水系由漳卫河、子牙河、大清河、永定河、潮白河、北运河和蓟运河构成,呈扇形分布。海河流域暴雨中心多集中在太行山、燕山迎风坡,是中国降雨强度最大的暴雨区。全年降雨的80%集中在6~9月,且大多集中在7月下旬到8月上旬的一场或几场暴雨。海河流域洪水与暴雨发生的时间基本相同,大多集中在7月下旬至8月上旬。流域洪水具有年内分布不均、年际变化大,预见期短、突发性强,洪峰高、洪量集中等特点。
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electromechanical system flight test
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electro-medicine
electromer
electromerism
electrometallurgy
electrometer
electrometer of field strength
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electromigration injection
electromigration refining of rare earth
electromotance
electromotive difference of potential
electromotive force
electromotive force, emf
electromotive force of cell
electromotive force of half cell
electromotive force of mutual induction
electromotive force of mutual induction, mutual induction electromotive force
electromotive force of self-induction
electromotive force of self-induction, self-induction electromotive force
electromotive four-pole swing
electro-motor
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electromyogram, EMG
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