The concept of horizontal drainage board method is proposed for the improvement of the stability of river embankment by the control of hydraulic gradient in flood infiltration.

为了降低河堤在行洪时的出口比降，提高堤防的稳定性，提出水平排水板工法的概念。

youdao

Culvert and horizontal pipes and spillway with hatch control need management of person specially assigned when flood is discharged.

涵、卧管和有闸门控制的溢洪道，在泄洪运行时需要专人管理；

youdao

But in recent years, domestic production boomed, with horizontal drilling techniques and hydraulic fracturing, or "fracking, " helping producers unleash a flood of gas from shale formations in Pennsylvania, Arkansas and elsewhere.

WSJ: Natural Gas Drops Below $3