SOIL MOISTURE MOVEMENT IN A HILLY WATERSHED-Observations and Numerical Analyses-

A study was made of possibility of simulating the behavior of soil water in hilly watershedby solving the fundamental equation for soil water movement using a computer.The soil moisture contents were measured at 90 points in the Minegado research basin locatedin the western suburbs of Kyoto. Using the results of the measurement, some basic characteristicsof soil water flow in hillside were discussed.Second, the soil water flow in an experimental slope was numerically simulated using thevertical two-dimensional finite element model. The results of the numerical simulation showedgood coincidence with the observed characteristics of soil water flow and verified the usefulness ofthe model.A study was made of possibility of simulating the behavior of soil water in hilly watershedby solving the fundamental equation for soil water movement using a computer.The soil moisture contents were measured at 90 points in the Minegado research basin locatedin the western suburbs of Kyoto. Using the results of the measurement, some basic characteristicsof soil water flow in hillside were discussed.Second, the soil water flow in an experimental slope was numerically simulated using thevertical two-dimensional finite element model. The results of the numerical simulation showedgood coincidence with the observed characteristics of soil water flow and verified the usefulness ofthe model