Coastal Group: Roll Models

As part of summer institute 2019 held in National Water Center, Coastal Group works towards systematic analysis of large-scale modeling of coastal areas.

Project Management

Objectives

Identify contributions of relevant physical processes to total water prediction by modeling idealized scenarios in coastal transition zones to provide a framework for efficient forecasting.

Idealized domains

The idealized domains were inspired by rivers and bays geometries over the Gulf and East Coast.

A few metrics were chosen to compare different rivers and bays and scale the idealized domains.

Bay/Estuary geometry:

• Wt Bay width at river end (upstream) - Wt = Wr in triagular geometry
• Wb Bay width at ocean end (downstream)
• Lb Bay length
• Parameters:
  • Rbr = Wb / Wr
  • Rbt = Wb / Wt
  • Rlb = Lb / Wb

River geometry:

• SInuosity = Curvilinear Length / Straight Line Length
• Wr River width

Three main Classes determined for this analysis:

1. River discharge directly in the ocean
2. River discharge in triangular bay
3. River discharge in trapezoidal/rectangular bay

For Class 1, two subdivisions were created to evaluate river sinuosity contribution in comparison with a straight line river: A) SI = 1 B) SI = 1.45

For Classes 2 and 3, three subdivisions were created to include the analysis of a barrier island between the bay and the ocean. A) SI = 1 B) SI = 1.45 C) SI = 1 with barrier island

Idealized models domains

Modeling configuration

A set of scenarios was created to evaluate water levels under tides forcing, storm surge, and discharge and roughness variation.

Simulation Scenarios:

• Roughness Manning's (-)
• Discharge (cms)
• Tides: Predicted, Storm Surge

	Simulation Name	R	D	T	status
S1	Ref	0.025	0	P
S2	R20	0.020	0	P
S3	R30	0.030	0	P
S4	D1000	0.025	1000	P
S5	TS	0.025	0	S
S6	D100	0.025	100	P
S7	D200	0.025	200	P
S8	D500	0.025	500	P

Results

• Identification of tidal signal in the river upstream for under different geometries and scenarios
• Identification of river and bay geometry contribution, as well as roughness, discharge, tides and storm surge in total water prediction

Deliverable

• Final Report and Presentation

Instructions

The following steps should be taken for using the plotting scripts:

1. Install docker.
2. Change directory to src/docker and create an image from the Dockerfile:

docker build -t plot .

3. Copy the plotting scripts to the folder that contains the D-Flow outputs and run one of the script e.g., cross_section.py, as follows:

docker run -v "$PWD":/home/plot plot python cross_section.py C2_A1_S1_R25_D0_TPG

The following steps should be taken for using tide_constituents.py:

1. Install Anaconda and load it in a command line.
2. Run the following command to create a new environment called tides:

conda create -n tides pip requests shapely beautifulsoup4 pandas scipy

then activate the environment conda activate tides.

3. Install some extra packages with pip:

pip install py_noaa baker astronomia filelike pyparsing

4. Clone the tappy repository to a location and install it:

git clone -b py3 https://github.com/taataam/tappy.git
cd tappy
python setup.py install

An example showing how to use the code is provided in src/tide_constituents/mobile_bay.py

The following steps should be taken for using gantt.py:

1. Install Anaconda and load it in a command line.
2. Run the following command to create a new environment called gantt:

conda create -n gantt plotly pandas psutil

then activate the environment conda activate gantt.

3. Install an extra packages:

conda install -c plotly plotly-orca

4. Then go the script's directory and run it:

cd src/gantt
python gantt_chart.py