Simple river reach with no structures
S1 S2 S3 S4 S5 S6 S7 R1 R2 R3 R4
• From nodes S1 to S7 are river cross section nodes
• Node S1, R1 are also Flow boundary (QTBDY) and Node S7 is also a Head boundary node (HTBDY)
• Choice of distance step, steepness, resolution
• To signify node S7 is end of reach set x=0