Preliminary study on the saturated hydraulic conductivity of brown forest soil in Yantai

Based on single-ring infiltration and generalized solution, the saturated hydraulic conductivities of brown soil under different land use patterns were studied, and the effects of different diameter rings on saturated hydraulic conductivity were also explored. The results show that infiltration rates, accumulative infiltration and saturated hydraulic conductivities, which were measured separately in sward, bare soil and road, decreases in turn. The calculated saturated hydraulic conductivities with 20 cm, 30 cm and 45 cm rings has obviously difference. The accumulative infiltration calculated with saturated hydraulic conductivities is very close to measured one, and the relative error as a whole is very low. At the beginning, the relative error was very high, then it decreased gradually. The relative error of calculated accumulative infiltration of sward, bare soil and road is less than 5% after 5 min, 7 min and 40 min, and it is less than 1% after 15 min, 43 min and 55 min. Furthermore, The relative error of calculated accumulative infiltration, of which 20 cm, 30 cm and 45 cm rings fluctuates obviously in the beginning, then keeps to steady.