The Differences of The Mechanism of Water Movement Between Lysimeter And Natural Phreatic Water Situation And The Analysis of Errors of Them
In this paper,the difference of the mechanism of water movement between lysimeter and natural phreatic water and the errors of them are analyzed. The analytic result indicated:There are differences between the amount of evaporation of phreatic water and the amount of percolation of rain measured by lysmeters and the real situation of natural phreatic water. These differences will vary along with the water-table fluctuation.The shallower the phreatic water table is ,the more obvious will be the errors. Consequently,when using the information of lysimeter,especially using the information of the lysimeters that are embedded in the depth that is less than 1.5m,some indispensable modifications should be done. Otherwise more obvious errors might appear in the results of calculation.
【CateGory Index】： P641.2