Abstract To solve the problem that data in soil point source infiltration experiment is difficult to read, and the error value is relatively large in data of automatic measurement in hillside forest environment, an artificial recognition function is added to improve the experimental precision. The improved soil infiltration measurement instrument was used to measure infiltration rate of the hillside forest land in Mountain Heng, and the results were summarized through an analysis of infiltration rate influencing factors and their curve fitting. Results show that the measured infiltration rates and their fitted curves are consistent with the characteristics of infiltration rate of common soil. This verifies that the point source infiltration experiment is feasible in the infiltration measurement of hillside forest land and the application scape of point source infiltration experimental method has been expanded. The updated soil source infiltration apparatus using the artificial identification reduces the experimental error to 0.3%-31% and the accuracy in infiltration rate measurement of hillside forest land has been improved greatly.
LIANG Yu-Shi,XIA Wei-Sheng-*,DING Hao-Dong et al. Improvement of soil point source infiltration gauge in hillside forest land application[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(7): 625-631.
GUAN Yao, LEI Tingwu, LIU Fangfang, et al. The automatic measurement system of soil point source infiltration monitoring the soil wetting process under the dripper [J]. Transactions of the CSAE, 2016,32(14): 1-7.(in Chinese)
BACHMANN J, HORTON R, VAN DER PLOEG R R. Isothermal and nonisothermal evaporation from four sandy soils of different water repellency[J]. Soil Science Society of America journal, 2001,65(6):1599-1607.
PENG Yi, LI Yuyuan, LI Zhongwu, et al. Comparison of soil infiltration characteristics in red soil slope land ecosystem[J]. Soil and water conservation research, 2009,16(6): 205-209.(in Chinese)
RITSEMA C J, DEKKER L W, HENDRICKX J M H, et al. Preferential flow mechanism in a water repellent sandy soil[J]. Water resources research, 1993, 29(7):2183-2193.
PHILIP J R. Theory of infiltration[J].Advances in hydroscience,1957,83(5):345-358.
WANG Weihan, PAN Wenying. Simple estimation method on kostiakov infiltration parameters in border irrigation[C]//Proceedings of the International Sympo-sium on Water Resource & Environmental Protec-tion,2011.
DE JONGE L W, JACOBSEN O H, MOLDRUP P. Soil water repellency: effects of water content, temperature, and particle size[J]. Soil Science Society of America journal, 1999,63(3):437-442.
LIU Lihua, FEI Liangjun, ZHU Hongyan. Effects of water temperature on soil water infiltration characteristics under drip irrigation[J]. Journal of drainage and irrigation machinery engineering, 2019, 37(2): 166-173.(in Chinese)