将难以利用的地下水量从地下水资源量中扣除后可得地下水实际可利用量。
The available groundwater is equal to the total amount of groundwater subtracting the part of groundwater, which is hard to use.
据说地球拥有的地下水量大约是其拥有的河流和湖泊水量的三千倍，而且地下水要干净得多。
The world is said to have about 3,000 times as much groundwater as water it has in rivers and lakes, and groundwater is far cleaner.
湿地对地下水，即地表以下的水量影响很大。
Wetlands have a big effect on groundwater, the amount of water below the surface of the land.
注意“净值”这一词：测量地下水渗入并且渗出湖水的实际水量比仅仅推断出它们的差异要复杂得多。
Note the word "net" measuring the actual amounts of groundwater seepage into the lake and out of the lake is a much more complicated matter than merely inferring their difference.
更不可思议的是地下水水位在上世纪八十年代的旱灾中暴跌后再度上升，水量开始变得充沛起来。
Amazingly, underground water tables that plummeted after the droughts of the 1980s had now begun recharging.
鱼类资源的消耗用水量的增加导致了地下水贮备迅速枯竭。
The depletion of fish stocks Increased consumption of water has led to rapid depletion of groundwater reserves.
本文提出一个仅含四个参数的数学模型来模拟一个流域或泄区的地面水和地下水的运动及水量平衡情势。
This paper presents a mathematical model which involves only four parameters to simulate the water movement and balance of surface and groundwater in a basin or an irrigation area.
然后利用地下水动力学法、地下水径流模数法对隧道开挖涌水量进行了预测。
Then water inflow in tunnel is forecasted using groundwater dynamics and groundwater modulus of runoff.
所建立的地下水垂向剖面的二维水量水质模型，对典型剖面中地下水的硝态氮污染进行了模拟和分析。
Two-dimension groundwater quantity and quality model in the vertical profile is made to carry out the simulation and analysis of nitrate-N pollution of the groundwater in the typical profile.
第三阶段应实现总需水量低于地下水系统补给资源量，使数十年超采造成的储存资源亏空逐年得以偿还。
In the third step, the total water requirement should be less than the renewable resources to compensate for the loss of storage resources due to the exploitation in the previous steps.
在无其他因素引起水量增、减条件下，地下水动态大于一年的趋势变化是地下水动态的异常变化。
Change of underground water level dynamic tendency for more than one year may be anomalous one, when there is no increasing or decreasing in water quantity.
根据降水量与地下水流量之间的相关关系，建立线性神经网络模型，并且将其用于地下水流量的动态预测。
According to the relationship between precipitation and discharge of groundwater, a model of linear artificial neural network is set and used for dynamic prediction of discharge of groundwater.
结合地下水水量水质耦合模型，提出地下水系统环境容量的概念。
Associated with the coupling model of quantity and quality of groundwater the concept of environmental capacity of groundwater system is suggested.
根据输水过程中有关水文要素的监测资料，分析了地下水、土壤水的变化，在水量平衡分析的基础上开展了“四水”转化的研究。
It analyzes the variations of groundwater and hygroscopic water based on the monitored data of hydrologic elements during delivery and conducts the study of conversion based on water balance analysis.
降水量的预报精度对以其为直接或间接补给源的地下水资源评价具有重要的影响。
Prediction accuracy of precipitation has an important influence on evaluation of groundwater resources that is recharged directly or indirectly by the precipitation.
蒸发蒸腾作用能消耗土壤水分，减少地下水的水量供应。
Evapotranspiration may deplete the soil moisture and rob supplies of ground water.
矿坑诵水量包括地下水涌水量及地表水汇水量两部分。
The rabbet water yield includes two parts of underground water and surface water.
结合工程实际情况，介绍在有地下水地区的暗渠施工降水案设计、涌水量计算、水泵选择。
An introduction is given to dewatering design, calculation of gushing water volume, and selection of pump for the construction of underdrain.
随着岩溶矿山开拓面的不断延深和排水量的不断增大，地下水位将持续下降。
As the exploitation level extends down and the drainage increases in karst mine, the groundwater level descends continuously.
对洛阳市的降水量、地表水资源量、地下水资源量及水资源总量进行评价。
The precipitation, surface water resources, groundwater resources, and total volume of water resources were evaluated for Luoyang City.
同时模型根据土壤水贮量变化来模拟月森林水量平衡，它详细模拟了大气降水，地下水、人工灌溉、林分蒸腾量、渗透水量和土壤水之间的动态变化。
At the same time, in view of the change of soil water storage, it simulates dynamitic change among atmospheric rainfall, groundwater, irrigation, forest transpiration, deep drainage and soil water.
退水量和地下水埋深之间近似为幂函数关系，与蒸发量之间近似服从线性关系。
The relationship between drainage water volume and groundwater table agreed with by power function, drainage water volume and evapotranspiration, a linear function.
结果表明：与地下水源热泵相比，在制热量和COP大致相当的情况下，节水量可以达到70%。
The results show that comparing with ground water-source heat pump, the water saving rate of the new system with the nearly equal heating and COP is about 70%.
地下水补给量的变化也引起泉水溢出带泉水量减少。
The groundwater recharge variety also influence the spring resources in overflow spring zone.
分别阐述了“补给法”地下水水质水量结合评价方法和“开采法”地下水水质水量结合评价方法的思路和操作步骤。
The thoughts and steps for the two methods for the combining assessment groundwater quality and quantity-make-up method and production method are elaborated respectively.
研究结果表明：地下水位升降对膨胀砂岩地基变形所以有着强烈的影响，其根本原因是含水量的变化。
The results obtained in this paper show that groundwater levels rise and fall forcefully impact foundation deformation of swelling sandstone, its dominant factor is change of moisture content.
本文根据达尔西地下水渗透定律，推导出了在不同含水层斜井井筒涌水量计算的理论公式。
Based on the Darcy's law of the infiltration of ground-water, this paper has deduced the theoretical formula for the inclined shaft water-make calculation in the different aquifer.
当地降水量的多年周期性变化决定了地下水位的多年动态。
The dynamic variations of groundwater level are subject to cyclic variation of precipitations.
地下水埋深的持续下降导致土壤含水量降低是除人为破坏而引起林木自然衰败、死亡，并引起灌区自然生态安全水平降低的主要原因。
The descending of groundwater line due to soil water reducing was the main reason that resulted in the destruction and deadness of forests.
地下水埋深的持续下降导致土壤含水量降低是除人为破坏而引起林木自然衰败、死亡，并引起灌区自然生态安全水平降低的主要原因。
The descending of groundwater line due to soil water reducing was the main reason that resulted in the destruction and deadness of forests.
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