FLOOD09983

• County: Statewide
• Community: State of Colorado
• Stream Name: All
• Basin: Statewide
• Title: Mudflow A Two Dimensional Hyperconcentrated Sediment Flow-routing computer Model
• Date: 3/1/1989
• Prepared For: State of Colorado
• Prepared By: Simons Li & Associates Inc.
• Floodplain - Doc Type: Educational/Technical/Reference Information

3,5

line Variables,

(I)
NNOD ' Number of grid elements for the flood phin.

(I)
NODe, Number of grid elements containing the channel"

(R)
SIDE '

(R)
TOl '

(R)
DTOlP ,

(R)
DTOl

(I)
DUM '

(1)
FP( 1,1) ,
(I)
FP(I,2) -
(I)
FP(I,3) -
(I)
FP(I,4) ,
(R)
FP(I,S) ,

(R)
FP(I,6) -
(R)
ARF(I) -

length of the grid element side (feet). The grid elements are
assumed to be uniform.

Surface detention (feet). This is a minimum value of the flow depth
for which computations area made.

41

Percent change in flow depth for each t'ime step (e.g., DTOlP 10,
= 10%).

Minimum change in flow depth f~r each time step.

Grid element (I) number of the flood pla,in grid system. A dummy
variable which is not used in the model. It is for the convenience
of reading the data input file only.

Grid el ement to the north of grid el ement 1.

Grid element to the east of gr'id element 1.

Gri del ement to the south of gri del ement 1.

Grid element to the west of grid element I.

Average Manning's n roughness coefficient assigned to grid element
1. (For grid elements containing a channel, a negative sign precedes
the n value).

Average ground-surface elevation for grid element I (feet).

Area reduction factor (ARF) for grid element 1. (0. ~ ARF(I) ~ L)
ARF(I) represents the percent of the grid element area that can be
covered by surface flows, and excludes buildings or other aspects
of the grid that cannot store flow volume. Further description of
the ARF is provided in Appendix B.