285. Line 1.1: IBF If one or more beach fills is placed during the 

 simulation period, a value of 1 ("yes") should be entered for the flag IBF 

 and responses given at Lines 1. 3 -1. 8. If there are no beach fills, a value of 

 ("no") should be entered, and the remaining questions in this subsection 

 may be disregarded. (If is placed at Line 1.1, Lines I. 3 -I. 8 will not be 

 read by GENESIS, and values remaining there may be arbitrary.) 



286. Line 1.3: NBF . The number of beach fills NBF that occurs 

 during the simulation period is entered here. 



287. Lines 1.4 and 1.5: BFDATS(I) . BFDATE(I) . The dates or time 

 steps when placement of the fill(s) is begun BFDATS(I) and ended BFDATE(I) 

 are respectively entered at these two lines, in chronological or increasing 

 order from the beginning dates or time steps of the fills (NBF values, 

 corresponding to line 1.3). GENESIS keeps track of the date from the start of 

 the simulation (Line A. 6), and, if the fills are specified in terms of dates, 

 GENESIS begins placing the fill on the beach at the date(s) specified. 



288. Lines 1.6 and 1.7: IBFS(I) . IBFE(I) . The grid cell numbers of 

 the starting IBFS(I) and ending IBFE(I) locations of the fills are entered 

 at Lines 1.6 and 1.7, respectively, in the same order as entered at Lines 1.4 

 and 1.5 (NBF values). The cell number where a particular fill is started 

 must be smaller than the cell number where it is ended. The fill is placed in 

 all cells between and including the starting and ending cells. 



289. Line 1.8: YADD(I) The amount of shoreline advance (advance of 

 the berm) YADD(I) that will be added to the existing shoreline by GENESIS 

 between the beginning and completion dates of the fill is given here. The 

 distances of shoreline advance should be entered in the same order as in 

 Lines I. 4-1. 7. 



290. For a certain time period (on the order of weeks or months) after 

 placement of a fill , waves and currents will remold the material to an 

 equilibrium shape as determined by the grain size of the fill and the wave 

 conditions. Fine particles, if present, will move offshore and out of the 

 effective zone of longshore transport. Also, the berm of the initial fill may 

 be higher than that of the original and neighboring beach. In the initial 

 process of readjustment, therefore, the volume of the fill may decrease from 

 that which was initially emplaced. It is presently beyond the scope of 



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