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  • Percolation irrigation takes way of underground micro - irrigation which worked with the aid of micro pore pipes for percolation that is buried at root zone . and the crops " demand for water can be met by percolating through the soil on the condition of low pressure at the right time with right volume
    渗灌是一种地下微灌形式,在低压条件下,通过埋于作物根系活动层的灌水器(微孔渗灌管) ,根据作物的生长需水要求适时适量地向土壤中渗水供给作物。
  • On the basis of brilliant exposition of macroscupic and microscupic features of cap rocks of deep - formation natural gas in songliao basin , the sealing capacity of cap rocks of natural gas in studied area is comprehensively evaluated , and creatively put forward a comprehensive cap rock - evaluating method using percolating velocity which natural gas pass though mudstone cap rocks
    登二段气源岩的扩散量为55 . 55 10 ~ ( 12 ) m ~ 3 ,占该段生气量的81 . 6 。在以上工作基础上,对深层天然气源岩-盖层系统的时空配置进行了深入探讨。
  • He leaned his head back and closed his eyes ; and like a child , crying , that forgets its grief in watching the sunlight percolate through the tear - dimmed films over the pupils , so martin forgot his sickness , the presence of ruth , everything , in watching the masses of vegetation , shot through hotly with sunshine that took form and blazed against this background of his eyelids
  • Percolating and the equivalent electrical circuit of cement - based conductive composite are analyzed . the characteristics of the lower percolation are found out . a new way to determine the lower percolation is proposed . carbon fiber reinforced cement and graphite conductive cement are studied to identify the new way . it is found that the new way is precise and convenient to determine the lower percolation of cement - based conductive composite
  • From roundwood reservoir in county wicklow of a cubic capacity of 2 , 400 million gallons , percolating through a subterranean aqueduct of filter mains of single and double pipeage constructed at an initial plant cost of 5 per linear yard by way of the dargle , rathdown , glen of the downs and callowhill to the 26 acre reservoir at stillorgan , a distance of 22 statute miles , and thence , through a system of relieving tanks , by a gradient of 250 feet to the city boundary at eustace bridge , upper leeson street , though from prolonged summer drouth and daily supply of 12 1 2 million gallons the water had fallen below the sill of the overflow weir for which reason the borough surveyor and waterworks engineer , mr spencer harty , c . e . , on the instructions of the waterworks committee , had prohibited the use of municipal water for purposes other than those of consumption envisaging the possibility of recourse being had to the importable water of the grand and royal canals as in 1893 particularly as the south dublin guardians , notwithstanding their ration of 15 gallons per day per pauper supplied through a 6 inch meter , had been convicted of a wastage of 20 , 000 gallons per night by a reading of their meter on the affirmation of the law agent of the corporation , mr ignatius rice , solicitor , thereby acting to the detriment of another section of the public , selfsupporting taxpayers , solvent , sound
  • In 0 - 200cm light dried layer was formed and can be recovered partly after rainfall , but beneath 200cm the serious perpetual dried layer has lower water content and larger thickness and is very difficult to be recovered in short period because of the special hydrological characteristics in the loess plateau where infiltration depth is about 200cm and could not percolate into deeper layer . ( 4 ) the landscape ecology in fuxian county shows that the two kinds of forest community have not declined
    ( 4 )富县天然山杨林和天然辽东栎林的景观生态特征表明,两类森林群落没有出现衰退的迹象,这说明森林群落合理的内部结构不会造成林地土壤水分的严重亏缺,其自然气候条件可以满足森林群落生存、发展的需要。
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