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Haihe River flood control
释义
Haihe River flood control
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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