CONDITIONAL ESTIMATION OF SOLUTE TRAVEL TIME IN HETEROGENEOUS FORMATIONS - IMPACT OF TRANSMISSIVITY MEASUREMENTS

被引:75
作者
RUBIN, Y [1 ]
DAGAN, G [1 ]
机构
[1] TEL AVIV UNIV,FAC ENGN,IL-69978 TEL AVIV,ISRAEL
关键词
D O I
10.1029/91WR02759
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Solute transport through heterogeneous formations is modeled by the travel time approach, i.e., the time tau it takes a solute particle to travel from the source to a control plane. Due to uncertainty tau is a random variable characterized by its cumulative probability density function G(tau). This function is used by regulatory agencies in pollution site assessment. The main aim of the present study is to examine the impact of data, namely measured transmissivities, upon G(tau) and reduction of uncertainty. This is achieved for two-dimensional steady flow of average uniform head gradient by using a Lagrangian approach developed in the past (Dagan, 1982, 1984, 1989; Rubin, 1990, 1991). The impact of data is seen in conditioning on measured values and in estimation of parameters characterizing flow and formation properties. The approach is illustrated by a simulation based on synthetic data. The results show how uncertainty is reduced by increasing the density of measurements for a control plane sufficiently far from the source.
引用
收藏
页码:1033 / 1040
页数:8
相关论文
共 25 条
[1]  
[Anonymous], 1978, MINING GEOSTATISTICS
[2]  
[Anonymous], 1990, GROUNDWATER MODELS S
[3]   AN EXACT SOLUTION OF SOLUTE TRANSPORT BY ONE-DIMENSIONAL RANDOM VELOCITY-FIELDS [J].
CVETKOVIC, VD ;
DAGAN, G ;
SHAPIRO, AM .
STOCHASTIC HYDROLOGY AND HYDRAULICS, 1991, 5 (01) :45-54
[4]  
DAGAN G, 1989, Journal of Contaminant Hydrology, V4, P79, DOI 10.1016/0169-7722(89)90027-2
[6]   THEORY OF SOLUTE TRANSPORT BY GROUNDWATER [J].
DAGAN, G .
ANNUAL REVIEW OF FLUID MECHANICS, 1987, 19 :183-215
[7]   STOCHASTIC IDENTIFICATION OF RECHARGE, TRANSMISSIVITY, AND STORATIVITY IN AQUIFER TRANSIENT FLOW - A QUASI-STEADY APPROACH [J].
DAGAN, G ;
RUBIN, Y .
WATER RESOURCES RESEARCH, 1988, 24 (10) :1698-1710
[8]   SOLUTE TRANSPORT IN HETEROGENEOUS POROUS FORMATIONS [J].
DAGAN, G .
JOURNAL OF FLUID MECHANICS, 1984, 145 (AUG) :151-177
[9]  
Dagan G., 1989, FLOW TRANSPORT POROU