CAJ | 학술논문

为提高地下水溶质迁移模型的模拟精度，减小因水文地质参数不确定性产生的误差，需要对数值模型进行参数敏感性分析。以某冲洪积扇平原孔隙水为例，利用GMS 7.0软件建立了地下水流模型和溶质迁移模型，并对模型进行了验证。通过引入敏感性指数作为量化指标，运用局部分析法中的因子变换法对模型中的渗透系数、孔隙度、弥散度三个参数进行了敏感性分析，参数变幅设置为20%。研究结果表明：(1)渗透系数和孔隙度的变化对污染物迁移距离影响最大，二者的敏感性指数相差20%；(2)弥散度的变化对污染物迁移距离的影响最小，与渗透系数和孔隙度相比，其敏感性指数相差一个数量级；(3)在20%的参数变幅内，污染物迁移距离与渗透系数和孔隙度呈良好的线性相关关系。
위제고지하수용질천이모형적모의정도，감소인수문지질삼수불학정성산생적오차，수요대수치모형진행삼수민감성분석。이모충홍적선평원공극수위례，이용GMS 7.0연건건립료지하수류모형화용질천이모형，병대모형진행료험증。통과인입민감성지수작위양화지표，운용국부분석법중적인자변환법대모형중적삼투계수、공극도、미산도삼개삼수진행료민감성분석，삼수변폭설치위20%。연구결과표명：(1)삼투계수화공극도적변화대오염물천이거리영향최대，이자적민감성지수상차20%；(2)미산도적변화대오염물천이거리적영향최소，여삼투계수화공극도상비，기민감성지수상차일개수량급；(3)재20%적삼수변폭내，오염물천이거리여삼투계수화공극도정량호적선성상관관계。
Inordertoimprovetheprecisionofgroundwatersolutetransportmodelandreducetheerrorscausedbytheuncertain2 ties of hydrogeological parameters, sensitivity analysis of parameters is needed for the numerical model. In this paper, a ground2 water flow andsolutetransportmodelwasestablishedtosimulatetheporewaterinanalluvialfanplainusingGMS7.0,andthe model was verified.Sensitivity index was introduced to quantify parameter sensitivity.Factor transformation method, known as a local analysis method, was used to perform sensitivity analysis of permeability coefficient, porosity, and dispersity. Variation rangeoftheparameterswassetto be20%.Theresultsshowedthat(1) permeabilitycoefficientandporosityhavethegreatest impactoncontaminantmigrationdistance,andthedifferenceofsensitivityindexbetweenthetwoparametersisabout20%; (2) dispersity has the least impact on contaminant migration distance,and the sensitivity index of dispersity is one order of magni2 tudelowerthanthatofpermeabilitycoefficientandporosity; and(3) contaminantmigrationdistanceshowsagoodlinearcorre2 lation w ith permeability coefficient and porosity w ithin 20% of variation ranges of both parameters.