| 1. | Measuring unsaturated hydraulic characteristic parameters , such as capillary soil water , saturated soil moisture , field moisture , saturated conductivity etc . , is not only expensive but also accuracy uncontrolled 测量非饱和带水力特性参数:毛管上升水、饱和含水率、田间持水率、给水度、饱和渗透系数等,即费时、费力又难以保证试验精度。 |