河海大学学报(自然科学版)
河海大學學報(自然科學版)
하해대학학보(자연과학판)
JOURNAL OF HOHAI UNIVERSITY (NATURAL SCIENCES)
2014年
2期
137-142
,共6页
北大港水库%库底地层%渗透系数%空间变异性%地下水溶质运移
北大港水庫%庫底地層%滲透繫數%空間變異性%地下水溶質運移
북대항수고%고저지층%삼투계수%공간변이성%지하수용질운이
Beidagang Reservoir%bottom stratum of reservoir%hydraulic conductivity%spatial variability%solute transport in groundwater
以天津市北大港水库为例,通过野外勘探、现场取样、室内试验、数值模拟等方法,研究水库库底地层渗透系数空间变异性对地下水溶质运移的影响。结果表明:北大港水库库底地层渗透系数较小,且呈现出较强的空间变异性;地下水流通量随地层渗透系数空间变异程度的增加而增大,渗透系数均值对水流通量的影响大于其标准差;渗透系数均值越大,在地下水流的抑制作用下,溶质运移程度越弱,而渗透系数空间变异性越强,地下水流的抑制作用相对越弱,溶质运移程度越强。
以天津市北大港水庫為例,通過野外勘探、現場取樣、室內試驗、數值模擬等方法,研究水庫庫底地層滲透繫數空間變異性對地下水溶質運移的影響。結果錶明:北大港水庫庫底地層滲透繫數較小,且呈現齣較彊的空間變異性;地下水流通量隨地層滲透繫數空間變異程度的增加而增大,滲透繫數均值對水流通量的影響大于其標準差;滲透繫數均值越大,在地下水流的抑製作用下,溶質運移程度越弱,而滲透繫數空間變異性越彊,地下水流的抑製作用相對越弱,溶質運移程度越彊。
이천진시북대항수고위례,통과야외감탐、현장취양、실내시험、수치모의등방법,연구수고고저지층삼투계수공간변이성대지하수용질운이적영향。결과표명:북대항수고고저지층삼투계수교소,차정현출교강적공간변이성;지하수류통량수지층삼투계수공간변이정도적증가이증대,삼투계수균치대수류통량적영향대우기표준차;삼투계수균치월대,재지하수류적억제작용하,용질운이정도월약,이삼투계수공간변이성월강,지하수류적억제작용상대월약,용질운이정도월강。
Field exploration, sampling, laboratory tests, and numerical simulations were conducted to study the impacts of the spatial variability of hydraulic conductivity of the bottom stratum of a reservoir on solute transport in groundwater. A case study was carried out in the Beidagang Reservoir, in Tianjin City. The results are as follows:the hydraulic conductivity of the bottom stratum of the Beidagang Reservoir was at a low level and showed a large spatial variability;the flow flux in the groundwater increased with the hydraulic conductivity and the impact of the average value of the hydraulic conductivity on the flow flux was greater than the standard deviation;inhibited by the groundwater flow, the solute transport weakened when the average value of the hydraulic conductivity increased;and the solute transport intensified when the spatial variability of the hydraulic conductivity increased because of relatively weaker groundwater flow.