net irrigation requirement中文什么意思

發(fā)音:

用"net irrigation requirement"造句

凈灌溉需水量

net: adj. 凈的，純的 (opp. gross) 無虛價(jià)的 ...
irrigation: n. 1.灌溉；水利。 2.【醫(yī)學(xué)】沖洗(法)，〔pl. ...
requirement: n. 1.要求，需要。 2.要求物，必需品；需要量；必要 ...
irrigation requirement: 灌溉定額; 灌溉需水量; 灌溉需水總量; 灌溉需要量; 灌水定額
irrigation net: 灌溉網(wǎng)

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例句與用法

The first part is about the computing of crop water requirements ( or crop evapotranspiration ) and net irrigation requirements ( nir ) of ten crops in bojili irrigated district . then the traditional irrigation schedules of winter wheat and summer maize , which are the main crops in bojili , were evaluated with simulating model isareg . third , the field application efficiency in the experimental areas was evaluated from three methods
本文即是由灌區(qū)實(shí)測(cè)資料計(jì)算各種作物需水量，推求其凈灌溉需水量；然后通過模型檢驗(yàn)現(xiàn)行作物灌溉制度是否具有合理性，并對(duì)田間灌溉系統(tǒng)進(jìn)行評(píng)價(jià)，求其實(shí)際田間灌溉效率；最后由兩種不同灌溉制度方案的對(duì)比，確定試區(qū)合理的作物灌溉制度，在此基礎(chǔ)上求出各代表年的田間灌溉需水量和用水過程線。
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
本文首先采用fao最新推薦的penman - monteith方法計(jì)算灌區(qū)的參照騰發(fā)量et _ 0 ，用kcisa按照fao的計(jì)算方法推求十種作物的作物系數(shù)k _ c ；由此基礎(chǔ)上計(jì)算出作物需水量et _ c ，根據(jù)結(jié)果分析了不同作物的需水規(guī)律；同時(shí)用作物缺水量nir (凈灌溉需水量)進(jìn)行頻率計(jì)算，求出了灌區(qū)的四個(gè)代表年，并分析了代表年年內(nèi)自然水分狀況和作物缺水規(guī)律。

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net irrigation requirement中文什么意思

例句與用法

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