降低水位 meaning in English
groundwater lowering
water lowering
Examples
- This lowers the water table and reduces soil alkalinization
这可降低水位,减少土壤的碱份。 - The model of studying the reservoir deposition is one - dimension and two - dimension embedded mathematical model , which is a one dimensional model study the whole reservoir and the two dimensional model study some important parts of the reservoir by utilizing the one - dimensional model output data . for pushihe lower reservoir , one - dimensional model studies the whole reservoir , and the two - dimensional model study the part of reservoir of 4 . 5km in length near the intake of the pump - turbine , to study the layout of the deposition and the and concentration of the suspended load near the intake
在一维数学模型计算中考虑了两种一、二期工程的衔接方案，每种衔接方案又分别计算了五种降低水位运行的方案，即保持全年库水位不变、保持汛期库水位不变、和在洪水来临时把库水位降到65 、 64 、 63 、 62米等；每种方案又比较了两种起调流量( 1000和500m ~ 3 s ) ，总共进行了20个方案的比较计算。 - It was specially pointed out that , when the tail water is constant maximum tide , the computed flood surface is higher than that of nonsteady current , so there is some safety superelevation . underestimation of the roughness will make downward bias to compute along - river surface and bring hidden trouble for flood control . to improve the section can decrease the water level or offset the water rise for increase of floodplains " roughness , but it need much engineering works
特别提出，按照恒定流计算出来的设计水位比非恒定水位具有一定的安全储备；而对于滩地糙率的低估又会造成设计水位的偏低，给防洪工作带来隐患；如果利用改进断面形式来降低水位或弥补糙率增加带来的水位抬高，需要较大的工程量，所以平时应注意滩面的减糙管理工作。