土渠 meaning in English

earth canal
earth channel

Probe into treatment measures for main channel slope in expansive soil region
总干渠膨胀土渠坡处理措施探讨
Field study of the effects of rainfall infiltration on channel slope of expansive soil
膨胀土渠坡降雨入渗现场试验研究
Ecb standard test method for determination of erosion control blanket performance in protecting earthen channels from stormwater - induced erosion
土渠防雨水冲刷用冲刷控制覆盖层