确定，发现 meaning in Chinese

ascertain

Comparing observed and simulated soil water contents using the data from two irrigation experimental fields validated the isareg model . then the irrigation schedules of winter wheat in 1998 - 2000 , which are the experimental years , were evaluated by the simulating results with isareg
用两年灌区实测资料对isareg模型进行了检验和参数确定，发现模拟的土壤水分变化曲线与实测土壤水分含量吻合良好，说明该模型可以用来模拟或者评价当地作物灌溉制度。