Simulation and estimation of drainage water from underground drains, runoff and root water uptake in cultivating wheat on field-scale using the Hydrus-1D Model

摘要

Considering the environmental problems caused by drainage water from drains, correct management c drainage water produced in growing field crops is of great significance. Therefore, use of models that ai capable of reliably performing this simulationis of interest. The HYDRUS-1D model was designed to Simula) one-dimensional water movement in porous media. It is able to receive information about the depth an manner of soil stratification, physical and chemical properties of each separate layer of soil, type of plan initial soil moisture, amount of precipitation and irrigation water, type of root distribution, growing seasoi the quantity of applied fertilizer at any given time and the desired concentration in irrigation water. In thi research, the information from cultivating wheat in the Kosar Pilot was evaluated in three experimenb fields under different irrigation management systems. Results indicated this model simulated the existin conditions with acceptable accuracy and that it could be used to study various management scenarios an evaluate methods of water management in fields.