After determining the control equation and defined problems for infiltration, redistribution and evaporation, implicit finite difference method was used for ponded infiltration, semi-infinite soil redistribution and semi-infinite evaporation. The calculated results agreed well with measured data.

9在確定了入滲bbw欧美熟女、再分布及蒸發(fā)的控制方程及定解問(wèn)題基礎(chǔ)上欧美熟妇A片在线A片织频，采用隱式差分格式對(duì)垂直一維積水入滲、半無(wú)限土體再分布及半無(wú)限土體蒸發(fā)進(jìn)行了數(shù)值模擬成年人福利视频，與計(jì)算結(jié)果對(duì)比表明婷婷五月综合视频精品，計(jì)算值與實(shí)測(cè)值比較符合艹到高潮网站。

In order to study the finger flow phenomenon during ponded infiltration process in layered soil, an experimental study was carried out to observe the occurrence, mechanism and environment of finger flow in six soil columns which have different grain sized sands overlain by loess soil.

根據(jù)層狀結(jié)構(gòu)土壤在積水入滲過(guò)程中存在發(fā)生指流的現(xiàn)象超碰99re91伊人公开精品，該文針對(duì)黃土地區(qū)&壚蓋砂&的土壤條件，在室內(nèi)以西安黃土為主體18禁看网站，對(duì)6種不同粒徑的砂質(zhì)雙層結(jié)構(gòu)土壤進(jìn)行積水入滲試驗(yàn)天天视频黄色片，以觀測(cè)研究發(fā)生指流的現(xiàn)象、機(jī)理與條件美女免费的黄色视频。

The rate of wetting front advance and infiltration rate under certain ponded infiltration was significantly reduced by Sodium Polyacrylate , and as a result effectively reduced water in a sandy soil leaking to a deeper layer under the plough layer.

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The lake is ponded by lava a long time ago.

這條湖是很久以前熔巖堵塞河道形成的欧美大屌插逼。

The lake is ponded by lava a long time ago.

這條湖是很久以前熔巖堵塞''久久这里的视频都是精品。

Trees, 61. 5% in photosynthetic rates res ponded to the high light level .

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In the pond the sponsor res ponded to the correspondent's co rresponding responsibility.

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Some are behind old lateral moraines, others ponded against the edges of active ice.

其中一些被老冰川側(cè)磧擋住了国产一级无码AV片在线观看，另一些就在活冰的邊上。

In this paper,based on determination of initial and boundary condition,implicit difference method was used to present difference equations in order to simulate soil water movement of one-dimensional ponded water infiltration,redistribution and evaporation mathematically.

而數(shù)值法則可采用不同的初始和邊界條件国产三级Av在在线观看无码，實(shí)現(xiàn)復(fù)雜條件下水分運(yùn)動(dòng)過(guò)程的預(yù)測(cè)中文自拍日韩精品视频在线观看免费，從而給出相應(yīng)條件下水分運(yùn)動(dòng)的分布規(guī)律[1，2]a4yy无码国产福利在线观看。

The measurement of ponded water infiltration,saturated hydraulic conductivity,water holding capacity,soil bulk density of different treatments of PAM show,①the velocity of ponded water infiltration and saturated hydraulic conductivity are both reduced;②water holding capacity is improved but ...

結(jié)果發(fā)現(xiàn)又黄又大免费黄片久久，各種處理土樣與對(duì)照相比，①積水入滲速率和飽和導(dǎo)水率值都有所降低。②各處理土樣的蓄水能力增強(qiáng)久久鲁一鲁做，保水能力未見提高几岁小孩啪啪啪黄色视频。③土壤容重有一定程度的降低。④以上各種趨勢(shì)隨PAM施用量的增大而增強(qiáng)欧美男女性生活视频免费无遮挡一级黄。