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 他头向后仰，闭上了眼睛，然后像一个哭泣的儿童望着阳光透过泪膜遮蔽的眼球忘记了悲伤一样忘掉了他的病，忘掉了露丝的存在，忘掉了一切。以他的眼帘为背景的蓬勃生长的丛丛草木被炽热的阳光穿透了，他望着。
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 从理论上分析了水泥基导电复合材料的渗滤过程及其等效电路，得出了导电材料含量达到下阈值时的特征，提出了一种新的判定水泥基导电材料下阈值的方法，并用碳纤维增强水泥和石墨导电水泥进行了验证，发现这种新方法可以方便准确地确定水泥基导电复合材料的下阈值。
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 但是由于夏季久旱，再加上每天供水一千二百五十万加仑，水位已降到低于排水口。都市监察官兼水道局技官土木工程师斯潘塞哈蒂奉水道局的指示鉴于有可能会像一八九三年那样被迫利用大运河和皇家运河那不宜饮用的水，除了饮用外，下令一律禁止使用市里供应的自来水。尤其是南都柏林济贫院，尽管限定用六英寸的计量器，每个贫民每日配给十五加仑水，然而在市政府法律顾问辩护律师伊格内修斯赖斯的监督下，经查表证实，每夜要浪费两万加仑水，从而使院外的社会各阶层也就是自费并有支付能力的纳税者们蒙受损害。
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。
