水库周边地下水位时滞监控模型

Lag monitoring model for groundwater table around reservoir

建立水库周边地下水位监控模型有利于掌握地下水位升降变化规律,确保周边人民生产和生活安全.由于环境量对地下水位存在一定的滞后影响,因此,要准确描述地下水位的涨落过程,必须考虑水位和降雨的滞后效应.本研究应用正态分布函数模拟库水位和降雨的滞后效应,建立了周边地下水位监控模型,根据该模型对某水库周边地下水位进行了建模分析.研究结果表明,基于滞后函数的周边地下水位监控模型,不仅可得到准确的滞后参数,同时具有较高的计算精度.

Construction of lag monitoring model will help master the change rule of ground- water table around reservoir and ensure production and life safety. In order to describe the change process of groundwater table accurately, the hysteresis effect must be taken into ac- count in monitoring model because the groundwater table lags behind such environmental parameters as water level and precipitation. The standard normal function was put forward to act as the hysteresis function of reservoir level and precipitation in the paper. A monito- ring model for groundwater table is formed based on the the hysteresis function. Lastly, the monitoring model was used to analyze the groundwater table around a reservoir. The case study showed that such monitoring model based on hysteresis function not only have the benefit of obtaining the precise delay parameters, but also have higher computational ac- curacy.