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water conservancy of ancient Beijing city
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water conservancy of ancient Beijing city
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〔中国古代城市水利〕
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water conservancy of ancient Beijing city
古代北京城水利
北京位于永定河与潮白河洪积冲积扇脊部,这两条河都距城区较远流过,引用存在许多困难。北京降水量年内分布很不均匀,总径流量偏少,自古就是缺水地区。开发利用永定河与潮白河水资源并防止其洪水灾害,是古代北京城水利的重点。
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