摘要
MODFLOW是目前世界范围内被广泛使用的地下水渗流模型。为分析MODFLOW中不同方程组求解方法及求解参数组合对计算结果精度的影响 ,对同一典型水文地质模型进行了一系列模拟试验。结果表明 :对于给定条件 ,选用PCG2法或SIP法 (如果求解参数组合选取恰当 )求解可得到满足精度的结果 ;而选用SSOR法任何使用的求解参数组合均无法获得满足精度要求的结果。模拟结果同时证实 ,除非水均衡误差也相当小 ,否则水头变化收敛指标较小时收敛的计算也不能保证计算结果有可靠的精度。
MODFLOW is a model of groundwater seepage widely used in the world at present. A series of mimulation tests were conducted on the same typical hydrogeologic model to analyze the impacts of different solution methods and combinations of parameters in MODFLOW. The results indicated that the solution may be accurate by using PCG2 method or SIP method for a given condition(if the combination of solution parameters is chosen properly). No accurate results can be obtained by using any combination of solution parameters by SSOR method. Verified by simulation results reliable accuracy of calculated results can not be guaranteed for small head change convergence index unless the error of water balance is small too.
出处
《工程勘察》
CSCD
北大核心
2002年第2期25-27,32,共4页
Geotechnical Investigation & Surveying
