Total Water Level Model

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The Total Water Level Model (TWL) predicts water elevations every 100m along the shoreline, as daily time series, based on offshore sea level, wave characteristics in the nearshore environment, and shore zone characteristics.

Technical Details

Input Files

The TWL model requires the following input files:

Path/FilenameDescriptionFields
{StudyArea}/DunePts.shp Provides information about beach dunes fat 10m locations along the shoreline
TWL Inputs/BuoyObsData_{s}.csv, where {s} is the ID of the climate scenario to run:
0: Base
1: Low
2:Medium
3: High
4: Extreme.
This setting is a scenario variable.
Provides offshore water levels that are used as inputs to determine TWL levels along the shoreline. The Offshore_Height, Offshore_Period, and Offshore_Direction are used as input into a set of radial basis functions that interpolate these values to estimate base water levels in the near-shore environment.

This is read during startup
Time
Offshore_Height (m)
Offshore_Period (hrs?)
Offshore_Direction (degrees)
WL_L
WL_H
TWL Inputs/Climate Scenarios/{cs}/{cs}_slr.csv, where {cs} is the climate scenario (e.g 'Base') Sea Level Rise values (daily)

Read during Run Initialization, where an entire run's worth of daily data is loaded.
time
slr_{cs}
TWL Inputs/Climate_Scenarios/{cs}/Simulation_{n}/BuoyData_{cs}.csv Daily Buoy data for a given climate simulation. Offshore_Height
Offshore_Period
Offshore_Direction
SWL
lowSWL
TWL Inputs/
TWL Inputs/

Output Files

The TWL model generates the following output files:

Path/FilenameDescriptionFields
TWL Inputs/Climate_Scenarios/{cs}/Simulation_{n}/DailyData_{cs}/DailyData_{t}.csv, where {t} is the transect number. Generated during Run Initialization, these files provide the radial basis function inputs for each transect in the simulation being run. Height_L
Height_H
Period_L
Period_H
Direction_L
Direction_H
Depth_L
Depth_H
TWL Inputs/

Dune Point Coverage

The TWL model utilizes a "Dune Point" coverage (shape file) to store information about Dune qualities at periodic intervals. It contains both required fields and "autogenerated" fields.

FieldDescriptionTypeRequired
DUNEINDX Dune Index long Yes
TANB Transect Slope double Yes
DT Dune Toe location double Yes
DUNECREST Dune Crest location double Yes
BEACHWDTH Beach Width float Yes
NORTHING Northing Toe double Yes
EASTING Easting Toe double Yes
NORTHNGCR Northing Crest double Yes
EASTNGCR Easting Crest double Yes
EASTNGSH Easting Shoreline double Yes
SCRate Shoreline Change float Yes
BEACHTYPE Beach Type int Yes
GAMMAROUGH Gamma Rough float Yes
DUNEHEEL Dune Heel float Yes
FRONTSLOPE Front Slope float Yes
BACKSLOPE Back Slope float Yes
DUNEWIDTH Dune Width float Yes

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