常見(jiàn)例句雙語(yǔ)例句Water potential reflects energy level of soil water and the gradient of water potential is an impotent factor describing direction and velocity of water flow.水勢(shì)反映土壤水的能態(tài)，而水勢(shì)梯度則是決定水流方向和速度的重要因素。It shows that temperature gradient and soil water potential gradient presented in the soil are the drive factor of salt accumulation in the winter because of the presentation of frozen layer.研究表明，鹽沼濕地凍結(jié)期，由于凍層的存在，土體內(nèi)產(chǎn)生的溫度梯度、水勢(shì)梯度，是冬季水鹽積累的驅(qū)動(dòng)力。According to the moisture potential gradient and soil water content in different depth, the author calculate water volume of soil water discharge groundwater by the method of soil water flux.根據(jù)實(shí)測(cè)的土壤水勢(shì)和土壤含水量資料，利用土壤水分通量法計(jì)算了土壤水補(bǔ)給地下水量，結(jié)果表明土壤水分通量法是一種簡(jiǎn)單易行的計(jì)算土壤水補(bǔ)給地下水量的方法。 返回 water potential gradient