查询词典 ponded

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在确定了入渗、再分布及蒸发的控制方程及定解问题基础上，采用隐式差分格式对垂直一维积水入渗、半无限土体再分布及半无限土体蒸发进行了数值模拟，与计算结果对比表明，计算值与实测值比较符合。

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.

根据层状结构土壤在积水入渗过程中存在发生指流的现象，该文针对黄土地区&垆盖砂&的土壤条件，在室内以西安黄土为主体，对6种不同粒径的砂质双层结构土壤进行积水入渗试验，以观测研究发生指流的现象、机理与条件。

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.

砂土的饱和导水率随着高分子化合物聚丙烯酸钠用量增加而降低，在恒定水头入渗条件下，聚丙烯酸钠降低了水分向深层运移的速度，同时降低了砂土的入渗速率，可以有效降低砂土水分的深层渗漏。

The lake is ponded by lava a long time ago.

这条湖是很久以前熔岩堵塞河道形成的。

The lake is ponded by lava a long time ago.

这条湖是很久以前熔岩堵塞''。

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

4% ，树木提高 61 。 5%，且木质藤本具有更高的光合能力。

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

在池塘里主办者对通讯员的相应责任作出了回应。

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

其中一些被老冰川侧碛挡住了，另一些就在活冰的边上。

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.

而数值法则可采用不同的初始和边界条件，实现复杂条件下水分运动过程的预测，从而给出相应条件下水分运动的分布规律[1，2]。

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 ...

结果发现，各种处理土样与对照相比，①积水入渗速率和饱和导水率值都有所降低。②各处理土样的蓄水能力增强，保水能力未见提高。③土壤容重有一定程度的降低。④以上各种趋势随PAM施用量的增大而增强。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。