Genetic algorithms and aquifer parameter identification
摘要
In order to identify aquifer parameter, authors develops an improved combinatonal method called best chromosome clone plus younger generation chromosome prepotency genetic algorithm (BCC -YGCP -GA), based on a decimal system simple genetic algorithm (SGA). The paper takes unsteady state flows in a two-dimensional, inhomogeneous, confined aquifer for a ideal model, and utilizes SGA and BCC-YGCP-GA coupled to finite element method for identifying aquifer hydraulic conductivity K1, K2, K3 and storage S1, S2, S3, respectively. It is shown from the result that GSA does not reach convergence with 100 generations, whereas convergence rate of BCC-YGCD-GA is very fast. Objective function value calculated by BCC-YGCD-GA is 0.001 29 with 100 generations, and hydraulic conductivity and storage of three zones are almost equal to the true values of ideal model.