Module DrainageNetwork
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Contents
Overview
This module can be used by two models: MOHID Land, and MOHID River Network. Like other modules, it has a specific input file, called DrainageNetwork_X.dat, where X is the simulation number. The following tables describe the keywords that can be used, their data type, and the default values (in case of omission).
General Keywords
Keyword : Data Type Default !Comment NETWORK_FILE : char - !Path to drainage network file CHECK_NODES : 0/1 [1] !Ckeck nodes consistency CHECK_REACHES : 0/1 [1] !Check reaches consistency GLOBAL_MANNING : real - !Rugosity in Channels GEO_CONVERSATION_FACTOR : real [1.] !Lat to Meters rough estimation
Stabilization Keyword
Keyword : Data Type Default !Comment STABILIZE : 0/1 [0] !Restart time iteration if high volume gradients STABILIZE_FACTOR : real [0.1] !max gradient in time steps as fraction of old volume MAX_ITERATIONS : int [100] !Max iterations for stabilized check DT_FACTOR : real [0.8] !Factor for DT Prediction MAX_DT_FLOOD : real [10.0] !Max DT if channel water level exceeds full bank
Hydrodynamic Keywords
Keyword : Data Type Default !Comment HYDRODYNAMIC_APROX : int [1] !1 - KinematicWave, 2 - DiffusionWave, 3 - DynamicWave NUMERICAL_SCHEME : int [0] !0 - ExplicitScheme, 1 - ImplicitScheme MASS_ERR : real(8) [0.001] !Max error in mass conservation MIN_WATER_DEPTH : real [0.001] !Min water depth in nodes (For h < MIN_WATER_DEPTH water stops flowing) INITIAL_WATER_DEPTH : real [0.0] !Initial water depth MINIMUM_SLOPE : real [0.0] !Minimum Slope for Kinematic Wave
Downstream Boundary Keywords
Keyword : Data Type Default !Comment DOWNSTREAM_BOUNDARY : int [1] !0 - Dam, 1 - ZDG, 2 - CD, 3 - ImposedWaterDepth, 3 - ImposedVelocity DEFAULTVALUE : real - !Default value at downstream boundary FILE_IN_TIME : char [NONE] !If DOWNSTREAM_BOUNDARY = ImposedWaterDepth, this can be NONE or TIMESERIE FILENAME : char - !If FILE_IN_TIME = TIMESERIE, this is the name of timeserie file for the downstream boundary DATA_COLUMN : int - !Number of column with data in FILE_IN_TIME
Output Keywords
Output is given for all nodes in HDF5 format, and also as time series for the specified nodes in TIME_SERIE_LOCATION file. These nodes are identified by their IDS (see Network file) and have to be inside the block <BeginNodeTimeSerie> / <EndNodeTimeSerie>.
Keyword : Data Type Default !Comment
OUTPUT_TIME : int int... [-] !time interval between outputs for all nodes, in HDF5 format.
TIME_SERIE_LOCATION : char - !Path to time serie file with the specified nodes (can be this file)
MAX_BUFFER_SIZE : 1000
COMPUTE_RESIDUAL : 1
DT_OUTPUT_TIME : 1200
TIME_SERIE_BY_NODES : 0/1 [0] !Keyword to see if the user wants the time series to be written by nodes, i.e.,
!One file per node, with all variables in the headers list
!if FALSE, its one file per variable with nodes in the headers.
Processes Keywords
Keyword : Data Type Default !Comment MIN_WATER_DEPTH_PROCESS : real [0.01] !Water Quality Process / Surface Fluxes shutdown DISCHARGES : 0/1 [0] !Use module discharges (WWTP, etc) TRANSMISSION_LOSSES : 0/1 [0] !If user wants to use transmission losses HYDRAULIC_CONDUCTIVITY : real - !Hydraulic Conductivity to calculate transmission losses REMOVE_OVERTOP : 0/1 [0] !Removes Water if channels are overtoped AERATION_METHOD : int [-] !1 - PoolAndRifle, 2 - ChannelControled_ T90_DECAY_MODEL : 0 [1] !0 - Constant, 1 - Canteras, 2 - Chapra T90 : real [7200.] !if T90_DECAY_MODEL = Constant SHADING_FACTOR : real [1.] !0-1 fraction of riparian shading FRACTION_SEDIMENT : 0/1 [0] GLOBAL_TOXICITY : char ['SUM'] !Global Toxicity Computation Method : SUM,MAX,RISKRATIO
Properties Keywords
<beginproperty>
NAME : cohesive sediment
UNITS : mg/L
DESCRIPTION : cohesive sediment
INITIAL_VALUE : 100.00
MIN_VALUE : 0.0
ADVECTION_DIFUSION : 1
ADVECTION_SCHEME : 1 !Upwind
DIFFUSION_SCHEME : 5 !CentralDif
DIFFUSIVITY : 1E-8 !m2/s
VIRTUAL_COEF : 0.01
WATER_QUALITY : 0
BENTHOS : 0
Decay : 0 !uses T90 decay model for fecal coliform
TIME_SERIE : 1
<endproperty>
Network file:
<BeginNode>
ID : int - !Node ID number
COORDINATES : real real - !Node coordinates
GRID_I : int - !I position of node, if grid
GRID_J : int - !J position of node, if grid
TERRAIN_LEVEL : real - !Bottom level of cross section
MANNING_CHANNEL : real GLOBAL_MANNING !Node rugosity
WATER_DEPTH : real INITIAL_WATER_DEPTH !Node initial water depth
CROSS_SECTION_TYPE : int [1] !1 - Trapezoidal, 2 - TrapezoidalFlood, 3 - Tabular
1 - Trapezoidal, 2 - TrapezoidalFlood
BOTTOM_WIDTH : real - !Bottom width of cross section
TOP_WIDTH : real - !Top width of cross section
HEIGHT : real - !Max height of cross section
2 - TrapezoidalFlood
MIDDLE_WIDTH : real - !Middle width of cross section
MIDDLE_HEIGHT : real - !Middle height of cross section
3 - Tabular
N_STATIONS : integer - !number os stations that define the cross section
STATION : real real ... - !station values
ELEVATION/LEVEL : real real ... - !elevation values
<EndNode>
<BeginReach>
ID : int - !Reach ID Number
DOWNSTREAM_NODE : int - !Downstream node ID
UPSTREAM_NODE : int - !Upstream node ID
<EndReach>
Sample
NETWORK_FILE : ..\..\GeneralData\DrainageNetwork\DrainageNetworkAlcabrichel_100ha_terrain.dnt CHECK_NODES : 1 CHECK_REACHES : 1 HYDRODYNAMIC_APROX : 1 MASS_ERR : 0.001 GLOBAL_MANNING : 0.06 MIN_WATER_DEPTH : 0.01 INITIAL_WATER_DEPTH : 0.0 XS_CALC : 1 DOWNSTREAM_BOUNDARY : 1 TIME_SERIE_LOCATION : ..\..\GeneralData\Timeseries\TimeSerieLocation_200_new.dat OUTPUT_TIME : 0 864000 DISCHARGES : 1 (1-if have a discharge file; 0 if not discharging) CONTINUOUS : 0 MAX_DT_FLOOD : 100 STABILIZE : 1 DT_FACTOR : 0.75 STABILIZE_FACTOR : 0.05 MINIMUM_SLOPE : 0.0001
If want to model Properties
Than additionaly to the above options need to define properties to be modelled. One block for each property (see a list
<beginproperty> NAME : salinity UNITS : psu DESCRIPTION : salinity DEFAULT_VALUE : 0.3 MIN_VALUE : 0.0 ADVECTION_DIFUSION : 1 !1-want to transport property; 0 - no transport DISCHARGES : 0 !1-property is discharged;0 - no discharges TIME_SERIE : 1 WATER_QUALITY : 0 !1-use water quality model for property transformation;0-no transformation <endproperty>
Creatig a drainage network file
- Obtain a drainage network with MOHID GIS in Delineate Basins
- Alternatively can also obtain a drainage network with program BasinDelimiter (from SourceSafe) with a basin.dat with the keywords, adapted to the study watershed:
TOPOGRAPHIC_FILE : ..\..\GeneralData\DTM\MDT200mSD.dat TRESHOLD_AREA : 100000 DELINEATE_BASIN : 1 OUTLET_I : 1 OUTLET_J : 44 WRITE_REACHES : 1 REACHES_FILE : ..\..\GeneralData\DrainageNetwork\DrainageNetwork.dnt
- Define the cross sections for the drainage network file in MOHID GIS.
DO NOT FORGET TO SELECT SAVE ALL IN MOHID GIS TO UPDATE THE FILE!!!
(Currently in this version of the cross sections program keyword TERRAIN_LEVEL is not written, instead is written BOTTOM_LEVEL (old version). TERRAIN LEVEL = BOTTOM_LEVEL + HEIGHT. Change it for example with excel, new program should be written)
- Define the network file just created in the drainage network data file with:
NETWORK_FILE : ..\..\GeneralData\DrainageNetwork\DrainageNetwork.dnt
