CAJ | 학술논문

MODFLOW 中现有的降水补给数据和井流数据是基于每个剖分网格输入的，导致基于 MODF-LOW 建立大区域水流数值模型前处理的降水补给文件和井流文件存储开销过大、读取效率低。为此，通过改进现有的降水补给子程序包 RCH 及开发新的子程序包 RAW，给出了一种基于面状补排项的数据输入新方法。改进后的 MODFLOW 程序通过读取 RCH 文件或 RAW 文件中每个分区的补排量数据，以及每个网格对应的分区编号，在程序内部实现了补排量向每个模型网格的分配。RAW 子程序包实现了多层面状补排量的表达，可用于面状的地下水开采、农业回灌等源汇项的处理。相对于原始的源汇项数据存储方式，基于新方法建立的华北平原地下水流模型，RCH 及 RAW 文件大小分别减小为原来的1/145和1/255，整个模型数据的读取时间的加速比为7．46。
MODFLOW 중현유적강수보급수거화정류수거시기우매개부분망격수입적，도치기우 MODF-LOW 건립대구역수류수치모형전처리적강수보급문건화정류문건존저개소과대、독취효솔저。위차，통과개진현유적강수보급자정서포 RCH 급개발신적자정서포 RAW，급출료일충기우면상보배항적수거수입신방법。개진후적 MODFLOW 정서통과독취 RCH 문건혹 RAW 문건중매개분구적보배량수거，이급매개망격대응적분구편호，재정서내부실현료보배량향매개모형망격적분배。RAW 자정서포실현료다층면상보배량적표체，가용우면상적지하수개채、농업회관등원회항적처리。상대우원시적원회항수거존저방식，기우신방법건립적화북평원지하수류모형，RCH 급 RAW 문건대소분별감소위원래적1/145화1/255，정개모형수거적독취시간적가속비위7．46。
Reading and writing precipitation and well data are all based on each grid in the existing MODFLOW.So building regional groundwater flow numerical models with refined spatial and temporal discretization often involves storing and reading large quantities of well and precipitation data.However, the storage requirement can be prohibitive and the program efficiency can be quite low.To address this problem,we have modified the existing package RCH and also developed a new package named RAW (recharge and well ), which is based on the existing packages in MODFLOW. The improved MODFLOW program can only read values of every subarea and the subarea number of each grid which is stored in the RCH or RAW file,and then allocates the values to corresponding grids.With the RAW package,the area recharge and discharge could occur in all layers.Therefore,it could be used to simulate the source and sink term,like groundwater exploitation and agricultural irrigation return.The correctness has been verified and the efficiency has been tested through simulating a theoretical groundwater flow model and a real North China Plain model respectively.Compared with the traditional method of storing data,the size of RCH and RAW file decreases 1/145 and 1/255 respectively,and the time ratio for reading data is 7.46.