水沖刷系統 的英文怎麼說
中文拼音 [shuǐchōngshuāxìtǒng]
水沖刷系統
英文
water-polishing system-
In the general design and analysis methods for problems of the breakwater stability, the concept of compositive safety factors is used usually. however, floodwater, storm wave and beach erosion as well as properties of soil medium are always random, which may have uncertainties
在防浪堤壩的設計中,傳統的安全性能分析方法採用綜合的安全系數概念,但洪水、風浪、河道沖刷、土力學特性等因子都是隨機性的,具有一定的不確定性。Thus it is very difficult to calculate the spill volume and water quality because they involve many processes such as rainfall, yield runoff of rainfall 、 flow concentration of surface runoff, ground pollutant build up 、 washout, the flow concentration of combined drainage system and cso
其中,合流制排水系統的溢流水量、水質的確定涉及到降雨,地面產流、匯流,地表污染物的累積、沖刷,污水在管渠中的匯流以及溢流等多種因素,採用一般方法很難定量計算。Afforestation has been carried out in hong kong as early as 1870s. the major purposes for this has shifted from amenity reasons, erosion control, production of firewood, improving water supplies and to the current interest in biodiversity enhancement and ecological restoration
植林工作始於一八七o年,其目的由早期在於美化環境控制沖刷、生產柴薪、改善集水系統,及至近年藉以增強生物多樣性及回復生態自然原貌。
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