地下水浅埋区农田地下水动态模拟

在地下水浅埋区,农田地下水动态对降水、蒸发等气象因素很敏感,研究它们之间的关系对农田水管理具有重要意义。对湖北省荆州农业气象试验站1981~2005年和湖北省荆州市四湖工程管理局排灌试验站2000~2004年实测降水、蒸发、土壤水和地下水资料进行分析,建立2种数学模型以模拟不同季节地下水埋深随基本分析时段有效降水、蒸发等因素的变化情况。用后验差指标法检验模型的拟合程度,结果表明,所建立的2种模型都能较好地描述农田地下水动态受降水量、蒸发量等因素影响的变化趋势。

The Simulation of Groundwater Dynamic State in Shallow Groundwater Field

In a shallow groundwater area groundwater dynamic state in a cropland is sensitive to meteorological factors such as rainfall and evaporation etc.,the relation among them is significant for water management at land level.Using the actual precipitation,evaporation,soil moisture and groundwater data which were measured by agricultural meteorological station of Jingzhou,Hubei, and irrigation and drainage experimental station of the four lake engineering management bureau,Jingzhou Hubei.This article established a few of mathematic models to simulation the groundwater table in the given period in different season by SPSS software,testified the regression level of the models with the posterior-variance-test and compared with them.The results show that these models with better precision could be applied to describe the tendency of the groundwater table varying with those factors such as precipitation and evaporation etc.in the period of valid precipitation.