... 22 78 22 85 Jepsen, R., J McNeil, and W Lick 20 00 Effects of gas generation on the density and erosion of sediments from the Grand River J Great Lakes Res., 26 (2) , 20 9 21 9 Jones, C and W Lick 20 00 ... 1,1,1-trichloro2 , 2- bis(p-chlorophenyl)ethane (DDT); 1,1-dichloro -2 , 2-bis(p-chlorophenyl)ethane (DDD); endosulfan; endrin; heptachlor; lindane; and 20 04 CRC Press LLC L1667_book.fm Page 72 Tuesday, ... Page 62 Tuesday, October 21 , 20 03 8:33 AM 2. 2.4 .2 Techniques for Calibrating a Model and Evaluating Uncertainty 2. 2.4.3 Measures of Model Acceptability 2. 3 Challenges and Emerging Issues 2. 3.1...