明沟排水

明沟排水条件下盐碱地改良优化配水模式

Optimization Model of Water Supply for Saline Land Improvement under Ditch Drainage

根据地下水位的变化特征，对控制土壤盐渍化发展的因素和对策进行了分析，提出以明沟排水为主，加大灌区下游地下水排泄能力；

The factors and countermeasures controlling the development of soil salinization were analyzed .

文中还对某些明沟排水和种稻冲洗条件下咸淡水界面移动过程给出了计算公式。

Formulas for the calculation of the positions of salt displacement fronts are developed .

该文阐述了滨海咸酸稻田暗管排水和明沟排水试验的概况。

This paper presents some results of the underground pipe and open channel drainage experiments of the saline and acid rice field in the coast area .

以明沟排水为对照，论述了内陆干旱重盐碱区暗管排水在排水排盐、控制地下水位、提高土壤脱盐效果及提高作物产量等方面的优越性。

Subsurface pipe drainage in drought-prone region is superior to surface drainage in draining off water and salt , controlling ground water-level , and increasing crop output , etc.

经过调研和反复现场勘察，确定的总体施工方案为：挖明沟排水，作业带晾晒，正常组对焊接，沉管下沟。

Therefore the general construction process scheme is worked out as follows : open trench drainage , work site dried in the sun , conventional butt welding , and pipe laid down into trench .