Modeling efforts that required these water surface elevations as boundary 

 conditions had to make adjustments by manipulating the data or replacing the 

 data by average values from all gages. In the present study, this ambiguity 

 did not enter because the water surface elevation data in the channels were 

 not used to supply boundary conditions, as discussed below. 



DYNLETl 



135. This section is concerned with the computation of tidal flow 

 through Masonboro Inlet using DYNLETl. An attempt is made to compare the 

 results with results obtained during the GITI studies, and also to perform a 

 comparative analysis of terms in the basic equations by analyzing their 

 relative importance. 



DYNLETl representation 



136 . Masonboro Inlet is represented in the model by 25 cross sections 

 or nodes in five channels (Figure 7). The channels are numbered from 1 to 5, 

 and there are two junctions numbered 1 and 2. The channels and their cross 

 sections (node numbers) are listed in Table 1. 



137. Channels 1, 2, and 3 meet at Junction 1. Channel 2 is a short 

 channel extending from the confluence of the main inlet and Masonboro Channel 

 to the confluence of Banks Channel and Shinn Creek. Junction 1 consists of 

 Nodes 7, 8, and 14, and Junction 2 consists of Nodes 15, 16 and 20. 



138. The cross-sectional geometrical data were taken from hydrographic 

 maps, and MLW was used as the reference datum. Values of Manning's coeffi- 

 cient of friction were specified at every cross-section data point. These 



Table 1 

 Channel Cross Sections . Masonboro Inlet 



Channel Cross Section 

 Channel Number From To 



1 17 



2 8 13 



3 14 15 



4 17 19 



5 20 25 



52 



