total head gradient

用法例句

The paper probes into the quantitative relationship of the commensurate days of heavy rain and the total precipitation and the result shows that if the commensurate days of heavy rain can be forecasted,the total precipitation in the flood season can be estimated,which is helpful for the forecast of blood.

文章探讨了汾河水库相当暴雨日数与总降水量的定量关系,结果表明:如果能预报出相当暴雨日数,就可估算出汛期的降水量,有助于汛期洪水的预报。

Using daily precipitation data and total precipitation from June to August during 1961-2005,we discuss the relevance between equivalent rainstorm day and total precipitation,precipitation grade.

利用商丘1961-2005年6-8月的逐日降水资料和总降水量资料,分析了相当暴雨日数与总降水量及降水等级的相关性,结果表明:相当暴雨日数概念的引入可以把汛期总降水量中暴雨过程降水与非暴雨过程降水分开;相当暴雨日数是一个气候统计量,其年际变率比总降水量更显著;与降水等级比较,相当暴雨日数与总降水量的相关性更好,且有利于研究形成汛期洪涝灾害的暴雨过程特征。

The analytical expressions of the seepage velocity and the drawdown of the two-dimensional nonlinear well flow problems have been derived.

在均质等厚、水平各向同性而竖向异性、无限分布的承压含水层中,以定流量抽水,根据水量平衡原理,建立了二维非线性水流运动方程,并针对确定的非线性渗流规律,用Boltzmann变换对方程进行了求解,推导出了二维非线性井流问题渗流速度和水头降深的解析表达式。

【Result】 The analytical expression of seepage velocity and drawdown was given.

【结果】从理论上求解出了裂隙含水层中非线性渗流区域内渗流速度和水头降深的解析表达式,并通过引入无量纲时间、紊流因子和井流函数,对所求解析解进行了化简。

This paper introduced a method of calculating surface slope for the tidal reach of the Yangtze River.

介绍了长江感潮河段水面比降的计算方法,并利用实测潮位资料计算长江下游干流南京至镇江河段水面比降,分析了长江感潮河段水面比降的特性。

According to the flow returning channel in dry seasons and the paralld relation between surface slope and bed longitudinal slope,the principle of channel regulation by dredging is proposed,which is proved from physical model test.

分析了洞庭湖区草尾至泥湾58km河段滩险碍航特征和枯水河床形态特点;并根据河道枯水期水流归槽和水面比降与河床纵坡具有趋于平行的对应关系,提出航道疏浚治理原则和方案,并通过物理模型试验进行了论证。

The annual total rainfall of300 mm seems somewhat low for the region at these latitude.

就位于这些纬度的这一地区来说，年总降水量300毫米似乎少了一些。

Supply Shock, The Alteration of General Price Level and Deflation;

供给冲击、价格总水平下降与货币量紧缩

The overall level of market prices declined.

市场价格总水平下降。

The general price level declined by small margin.

价格总水平小幅下降。

An amendment should decrease bulk density, increase total porosity, and increase water and air content.

改良剂能降低堆积密度，增加总孔隙度，增加水和空气的含量。

An amendent should decrease bulk density, increase toltal porosity, and incr ease water and air content.

改良剂能降低容重，增加总孔隙度，增加水和空气的含量。

The Spiral Decrease Effect of General Demand under the Price Falling;

论价格总水平下降的总需求螺旋下降效应

International Workshop on Precipitation Measurement

国际降水测量讨论会

Location of Precipitation in the Whole Country in 2001

2001年度全国降水量布

The quantity of such water falling in a specific area within a specific period.

降水量某一特定时期内特定区域的降水数量

there is little rain in most parts of the country with most precipitation occurring along the coast.

大部分地区降水量较小，沿海地区降水量较大

In general, the annual rainfall in these regions is less than the annual water loss by evaporation.

总的来说，这些地区的年降雨量比一年内由于蒸腾而失去的水分要少。

The general level of market prices continued to drop.

市场价格总水平继续下降。

Gastric secretion is reduced in volume and total acid content.

胃分泌的容量和总酸度降低。

Total volume of cargo transportation was 305.443 million tons, down by 0.4 percent over the previous year;

全年货运总量30544.3万吨，比上年下降0.4%。

Structure Optimization when Power Consumption Falls

电力消费总量下降情况下的结构优化

The correlative degrees between the productivity and RGS, annual rainfall and key growth season rainfall (KGSR) were 0.927, 0.893 and 0.859, respectively.

年降水量次之 ,为 0 .893; 关键期降水最小 ,为 0 .85 9。

Quantitative Diagnostic Analysis of Surface Rainfall Processes by Surface Rainfall Equation

地面降水诊断方程对降水过程的定量诊断