上海充通大￥ SHANGHAI JIAO TONG UNIVERSITY Page.01 ·Investigation methods土壤入渗特征的调查分析 In order to determine soil infiltration curves,the double loop permeameter(IN-8W)was used to measure the infiltration rate of the soil. 0T-N12 采用双环入渗仪测定土壤的稳定入渗率；利用 达西定律计算土壤蓄水容量。 Darcy's Law was then applied,with hydraulic slope approximately equal to one,meaning the permeability coefficient equals the soil infiltration rate measured by the permeameter.The soil Figure 4-2-2.Double loop permeameter water storage was determined using mass difference,asPage . 01 • Investigation methods 土壤入渗特征的调查分析 • In order to determine soil infiltration curves, the double loop permeameter (IN-8W) was used to measure the infiltration rate of the soil. • 采用双环入渗仪测定土壤的稳定入渗率；利用 达西定律计算土壤蓄水容量。 • Darcy’s Law was then applied, with hydraulic slope approximately equal to one, meaning the permeability coefficient equals the soil infiltration rate measured by the permeameter. The soil water storage was determined using mass difference, as Figure 4-2-2. Double loop permeameter