摘要
以我国大型圩区为研究对象,开发出一通用的地下水溶质运移随机模拟数学模型,用以模拟圩区地下水中污染物运移与累积情况。分析了大气降水、地表蒸发等随机变量的模拟预测方法,应用随机理论及时间序列理论对上述动态因素进行动态模拟,建立了不同边界条件的圩区地下溶质运移随机模拟模型。应用MODFLOW软件进行数值分析,给出特征点处地下水中总氮浓度随时间的变化规律,并提出现状封闭率条件下的适宜水面率及年排污最大量。结果表明,地下水总氮含量模拟值与实测值最大相对误差11.67%。
A random simulation developed in this article, and mathematic model of groundwater it can be used for the simulation solute transport in large-scale polders is of solute transport and accumulation in groundwater. The simulation methods of precipitation, evapotranspiration and other random varies are an- alyzed, and dynamic simulation is carried out on the above random factors by using of random theories and time-series theories, then the random simulation mathematic model under different boundary conditions is established. Jiangxi Gandong Polder is the studied area in this article, after calculation and simulation, simulation curves of total nitrogen at characteristic spots are educed, and feasible area rate of water surface and the maximal annual recharge of contamination are put forward. The results indicate the maximal relative error between simulation values and observation values of total nitrogen concentration is 11.67%.
出处
《灌溉排水学报》
CSCD
北大核心
2006年第4期59-63,共5页
Journal of Irrigation and Drainage
