discharge is calculated. Next, the drainage area of each sub-basin is varied, and discharge calculated once again for each area variation.
220.127.116.11 HEC-1 Model
Figure 5.10 shows the area delineated by TxDOT for the HEC-1 model. The area in blue is included in the HEC-1 model although it does not pertain to Buttermilk (Area 2). For this analysis, the blue area is deleted from the HEC-1 model.
Figure 5.10: HEC-1 Study Area
The corresponding unmodified HEC-HMS diagram (the HEC-1 model was imported into HEC-HMS) is shown below in Figure 5.11.