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

3,4

line yariable!l

(I)
IUPMUD - Switch, 0 or I; 0 for clear water routin~l, I for routing mud flows
in the uDstream watershed to create a mud fl ow hydrograph for
alluvial fan routing. Set IlIPMUD = J wlhen model ing the upstream
watershed rainfall ,runoff and adding sediment to the runoff when it
enters the channel. IUPMUD = I will require definition of a sediment
concentration matrix.

(I)
INPRINT Switch, 0 or I; I suppresses the printing of the input data file in
the output fil e except for th{! i nfl ow hydrograph.

(I)
ICHECK - Switch, 0 or I; 1 i nit i ates a subrout i ne whi ch checks the input datau
fil es for possi bl e errors. The results are pri nted in the fil e
CHECKT and are self explanatory.

(R)
DTMIN Minimum time step (seconds). A suggested starting value is one (1)
second.

(R)
DTMAX ' Maximum time step (seconds).

(R)
DTI ' Time step increment (seconds),

(R)
DTD, Time step decrement (seconds).

(R)
SIMUL ' Simulations time (hours).

(I)
ITER, Interval of time steps that the subroutinE' INTER is called. If ITER
= 1, the subrout i ne whi ch i ntel'faces the channel and the flood p 1 a i n
is initiated.

(R)
TOUT, Output time interval (hours).

(I)
KMODEL ' Switch, 1 or 2; 1 initiatl!s a kinematic wave approximation to the
momentum equation; 2 calls for the diffusion wave approximation to
the momentum equation.

(R)
AMANN, Manning's n roughness coefficient increment. AMANN will uniformly
increase the Manning n value for every grid element in the system.