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古代北京城水利
释义
古代北京城水利
Encyclopedia
工学
〔中国古代城市水利〕
释
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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shaft deepening
shaft development
shaft distortion
shaft drainage
shaft drilling
shaft drilling machine
shaft encoder
shaft excavation
shaft fixed platform
shaft for cable and pipe
shaft furnace
shaft furnace iron smelting in Africa
shaft hoisting
shafting
shaft kiln
shaft-less printing system
shaft lining
shaft lining process
shaft lock
shaft of underground oil storage in rock caverns
shaft process of pelletizing
shaft spillway
shaft state measurement
shaft station
shaft sump
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