The runoff and sediment on slope plot are measured with water concentrate pond or box currently

which could measure amount of runoff and sediment of a single storm rainfall but not the dynamic change of them during the process of rainfall

and could not determine the amount of runoff and sediment under various intensities accurately. Because the installations currently used in small watershed are mostly for artificial measurement at fixed time

it is difficult to determine the variation of runoff with time precisely and is with greater errow in measurement

the pracaticality of the data is poor. The paper introduces the station to measure runoff and sediment automatically

set in two experimental small watersheds in Sunjigou gully at Tienongwan Forestry Field of Yichuan county

to evaluate the benefits of forest in reduction of water and sediment. The two stations may provide the data on the flow process of flood short in the study of runoff and sediment

being thought as the efficient tools for the dynamic monitoring of runoff and sediment.