水平降水

工程实践表明，水平降水有较高的效率。

The project practice indicates , there is relatively high efficiency in horizontal precipitation .

基坑水平降水的数学模型及应用

Mathematics Model and Application of Horizontal Well Dewatering in the Foundation-pit

水平井降水技术在热力隧道暗挖工程中的应用

Application of water lowering techniques with horizontal wells to the concealed excavation of heating power tunnel

模式包括地形、摩擦、水平扩散、降水、蒸发和各种非绝热等物理作用。

The physical factors of orography , friction , horizontal diffusion , large-scale precipitation , evaporation and various non-adiabatic heating are included .

模式所需要的参数、初始值和强迫值（太阳短波辐射、大气长波辐射、水汽压、气温、水平风速和降水）均来自实地测量。

Parameters , the initial values and forced values ( short-wave solar radiation , atmospheric long-wave radiation , vapor pressure , air temperature , horizontal wind speed , and precipitation . ) are obtained from the direct measurements .

对于水平井的降水计算，提出了水平井等效渗透系数的新概念及其计算公式，可将水平井实际很复杂的边界条件移置到井口处，使计算简化；

Concerning the dewatering calculation of the horizontal well , this paper presents a new concept of equivalent coefficient of permeability as well as the related calculation formula , which can simplify the calculation by displacing the actually complex boundary condition to the mouth of well .