自凈參數 的英文怎麼說
中文拼音 [zìjìngshēnshǔ]
自凈參數
英文
self-purification parameter-
Due to its flexibility, the lrt system can be designed to match both the physical environment and transport demands as well as to provide an alternative choice with quality service. all these factors have contributed to the phasing - out of the old streetcar systems. beginning in the mid - 1970s, light rail transit systems have enjoyed a period of sustained growth, not only providing public transportation but also contributing to the renewal of declining city districts, reutilizing unused rail lines, and providing impetus to local economic development
使得有軌電車自1970年代中期，以輕軌運輸的新風貌漸漸復興，不僅擔負公共運輸功能，更常結合老市區都市更新、舊鐵道再利用、促進經濟再發展的聯合開發計畫，吸引民間投資參與建設，透過由街道面進出的低月臺車站、無欄柵式收費制度、造型流線超低底盤車輛、軌道沿線綠化設施等設計，在都市環境改善與都市永續經營上，充分發揮凈化、綠化、人性化、地標化等效益，發展至今估計全世界輕軌運輸系統路網數目已達約400個左右。In the fourth part, the field irrigated water requirement were gotten based on the recommended irrigation schedules and irrigated areas often crops. in this paper, the reference evapotranspition et0 in three counties in bid was computed by penman - monteith method and the crop coefficients, kc of ten crops by kcisa model and the crop water requirements, etc, were computed simply by kc et0. meanwhile, four representative years by frequency analysis are gotten according to net irrigation requirements and planted areas of different crops in bojili irrigation district
本文首先採用fao最新推薦的penman - monteith方法計算灌區的參照騰發量et _ 0 ，用kcisa按照fao的計算方法推求十種作物的作物系數k _ c ；由此基礎上計算出作物需水量et _ c ，根據結果分析了不同作物的需水規律；同時用作物缺水量nir （凈灌溉需水量）進行頻率計算，求出了灌區的四個代表年，並分析了代表年年內自然水分狀況和作物缺水規律。
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