查询词典 aquifer

On the contrary: Just one of many examples of worldwide profligate waste is that of the great Ogallala Aquifer, which sits atop America's High Plains states.

事实正相反。关于世界各地挥霍浪费现在来举一个例子。

Beach groundwater table fluctuates with tidal oscillations in coastal unconfined aquifer. The period-averaged water table height is higher than the steady-state water table with the neglect of tidal effects. That is, there exists an overheight between the two.

潮汐海平面上下波动带动毗邻的滨海地下水水位振动，对达到动态稳定后的地下水水位作周期平均后，其位置高出不考虑潮汐作用的稳态水位，即潮汐影响下滨海地下水水位存在超高。

Based on data of pumping test, this paper summarized the variational law of well in phreatic aquifer of loess and the diversified relationship between water table and pumping time.

本文根据抽水试验资料总结了黄土潜水井水跃值的变化规律并分析了其成因；总结了水位降深随抽水时间的变化关系，并建立了经验公式；提出了公式中参数的确定方法。

Three analytical solutions are given including the wet front analysis solution of double medium soil column,the analytical expression of piezometric tube water head and saturation for steady state and the analysis solution of seepage in unconfined aquifer with a periodic boundary condition.

推导了双介质土柱表层水入渗的下渗锋面解析表达式、稳定状态时测压管水头分布与饱和度分布的解析表达式，并给出了有周期性边界条件的有限潜水层内渗流自由面的解析表达式。

Examination of the equilibrium status of a point in the salt water zone and the description of piezometric heads at two points in both the salt water and fresh water zones reveals that the location of the fresh water-salt water interface in a coastal homogeneous, isotropic unconfined aquifer can be estimated based on piezometric heads at two points in the same vertical line tapping respectively the salt water zone and the fresh water zone (from the water table to the interface) when the groundwater flow system is in a steady state and satisfies the Dupuit assumption.

通过考察咸淡水界面之下咸水带任意点的压力平衡关系和咸水带及淡水带任意点的水头描述得知，当地下水流处于稳定状态且满足Dupuit假设时，可以根据同一垂直线上界面之下咸水带任意点的咸水测压水头和界面之上淡水带任意点的淡水测压水头确定滨海均质各向同性潜水含水层咸淡水界面的位置。

A mass of experiments validated that exploitation and rational utilization of saline shallow groundwater, declining the water level to an optimal depth to reducing water invalid evaporation can increase amount of water resources and storage capacity of aquifer, prevent waterlogging or drought, improve groundwater salinity and control the process of soil salination, improve the eco-environment, alleviate the threat for the resource of fresh water.

大量的实验证明，合理开发利用浅层咸水，使咸水水位降低到合理水平，可以：避免地下水的无效蒸发，增加水资源量；增强调蓄能力和抗早防涝能力；促进浅层咸水淡化，改造盐碱地，改善生态环境；减轻对淡水资源的威胁。

This paper research geology and hydrogeologic condition of Liangbaoshi coal mine, especially hydrogeologic condition of sandrock crack aquifer with high pressure which is the main threat to 3 coal seam based on full study of factual information.

本文分析了梁宝寺矿井的地质及水文地质条件，重点分析了威胁现主采煤层—3煤的主要含水层即高承压砂岩裂隙含水层的水文地质特征，根据已揭露的实际资料进行了详细分析研究。

Studying on hydrologic geology character of sandrock crack aquifer with high pressure and technology of preventing and controlling water has important operation significance to safety production of exploiting.

进行高承压砂岩裂隙含水层水文地质特征及防治水技术研究，对于搞好矿井安全生产具有十分重要的现实意义。

Hypoground coal of taiyuan group of which roof is the second limestone karst water (L2) confined aquifer is main coal mining seam in Siwan of Hebi mine.

鹤壁矿区寺湾煤矿主采煤层为石炭系太原群下夹煤岩，顶板为太原群第2层薄层灰岩岩溶水承压含水层。

By analyzing the general features of aquifer, a new concept of "the flow transfixion" was introduced, and the interaction between the flow transfixion and the heat transfixion and great significance of the flow transfixion to projects were analyzed.

通过分析含水层储能的一般特点，提出流贯通，分析流贯通和热贯通的相互作用、相互影响及对工程实际的意义，并基于地下水水热运移的基本原理，建立地下水流动数值模型，在此基础上对沈阳某场地水源热泵工程的运行进行流场及温度场的数值模拟分析，给出产生流贯通的依据，进而研究流贯通对热贯通的影响，并为该地区的地下水源热泵工程设计提供一定的参考。

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。