給排水專業(yè)英語unit4

1、Specialized English for Water and Wastewater Engineering,給排水專業(yè)英語,主講教師：李康,Lesson 4 Stormwater Collection and Sewer Design,雨水收集和管道設(shè)計,4.1 Words and expressions Review,Domestic wastewater

2、 生活污水Drainage system 排水系統(tǒng)Combined sewers 合流制 Separate sewers  分流制Untreated water 未處理水Finished wat

3、er 出水Organic pollutant 有機(jī)污染物Biochemical oxygen demand (BOD)生化需氧量,,,,,,,,,4.2 New words and expressions,Hydraulic load 水力負(fù)荷Organic load

4、 有機(jī)負(fù)荷 head loss 水頭損失 microorganisms 微生物Hardness 硬度total suspended solids (TSS) 總懸浮固體 sedimenta

5、tion basins 沉淀池Anaerobic 厭氧的Aerobic 需氧的，好氧的chemical oxygen demand (COD)生化需氧量,,,,,,,,,,,4.2 New words and expressions,self-purification

6、 自然凈化open-channel 明渠hydrograph 水位圖，水位曲線intensity-duration-frequency curves 強(qiáng)度-持續(xù)時間-頻率曲線 retention basins 貯水池moisture

7、 水分，濕度,,,,,,,4.3 Important sentences,(第三段) Design objectives Design objectives are generally established during the planning process. Traditionally, such objectives dealt only with

8、 runoff quantity and specified the desired levels of protection against flooding by specifying return periods of design rainfall events. The minor drainage , which includes underground sewers and small open channels and

9、provides local convenience and prevention of water ponding , is typically designed for short return periods, from 1 to 10 years. The major drainage system conveys flood flows through urban areas and includes large sewers

10、 , the natural drainage system, swales, streets and other overland routes. This system is generally designed for return periods from 50 to 100 years.,明確，指定,積水,重現(xiàn)期,4.3 Important sentences,1. (第六段) Rainfall data are used i

11、n urban runoff calculations in various forms, depending on the design approach and computational procedure used. The most common forms include intensity-duration-frequency curves, synthetic design storms, historical desi

12、gn storms, and actual or synthetic long-term rainfall records. Although the literature on rainfall data for storm sewer design is rather extensive the issues of uncertainties in rainfall inputs and their impact on calcul

13、ated runoff flow have not been fully resolved. Uncertainties include errors in point measurements, and impacts of temporal and spatial distributions on estimates of catchment rainfall. Other uncertainties are introduced

14、in the analysis of observed data by using various assumptions which may or may not be valid. It should be noted , however, that the impact of rainfall data uncertainties on calculated runoff flows is somewhat reduced by

15、the fact that the catchment functions as a filter which dampens out some perturbations (real or spurious) in rainfall inputs..,擾動,廣闊的，廣大的,減弱,假的,,4.4 Quiz一、專業(yè)詞匯翻譯（每個1分）1、貯水池 2、自然凈化 3、水頭損失 4、沉淀池

16、 5、水位圖 6、坡度線 7、反硝化作用 8、強(qiáng)度-持續(xù)時間-頻率曲線9、gutter 10、dampen out 11、anaerobic 12、aerobi

17、c二、短句翻譯（每題4分）1、The function of a drainage system in a building is to remove safely and quickly sanitary sewage, industrial wastes, and rainwater.2、The standards for water quality have significantly increased concurr