Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Sichuan University(Engineering Science Edition)》 2009-06
Add to Favorite Get Latest Update

The Conditional Simulation of Groundwater Flow

SHI Liang-sheng,LIAO Wei-hong,YANG Jin-zhong,CAI Shu-ying(National Key Lab.of Water Resources and Hydropower Eng.Sci.,Wuhan Univ.,Wuhan 430072,China)  
In order to evaluate the effect of parameters' measurements to the uncertainty of groundwater flow,a conditional model for groundwater flow based on the Karhunen-Loeve decomposition and perturbation expansion is proposed,in which the spatial variability of log conductivity,recharge and boundary conditions are considered together.The derivation of the numerical modeling for groundwater flow subject to conditioning points of multiple random fields are also studied.The numerical experiments show that for some special covariance functions and lower-order Karhunen-Loeve expansion,the proposed model has high efficiency and satisfactory accuracy comparing to Monte Carlo simulation.The conditional simulation reduces the overall head variance.For the cases with larger correlation length and more conditional points,the reduction to the overall uncertainty is more significant.The variance reduction also depends on the locations of conditioning points.The conditioning points should be located in the region that may bring the largest reduction to the uncertainty.In reality,the measurement scheme should be determined by the real flow and type of parameters.
【Fund】: 国家自然科学基金资助项目(40672164;50639040)
【CateGory Index】: TV131.3
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved