RE:PEAT

This article is a stub.

RE:PEAT is a project created by the Hoogheemraadschap De Stichtse Rijnlanden, who are a water authority in the Netherlands. The project is concerned with the problems surrounding subsidence in areas with significant peat soil, and the means to remedy or work around the problems surrounding it.

General information

The project is currently only available in Dutch. It has 2 levels.

Stakeholders

There are 4 stakeholders present in this project:

• Municipality: The municipality is the government body who is concerned with the general care for the area, including but not limited to the livability for the residents, the viability of the agricultural sector, and the affordability of the maintenance of the local infrastructure.

• Residents: The residents are the citizens in the area, who are concerned with the livability of the area. Their concerns are with their standards of living, and the costs associated with them.

• Farmers: The farmers are the commercial/agricultural party concerned with revenue, but secondarily also with the quality of their land, both for their crops and the general livability.

• Water authority: The water authority is the party in control of the water levels in the area, and with that the main tool for combating subsidence. However, they are also responsible for the costs associated with water management, and other hydrological aspects such as water safety and water quality.

Applying the template

Required data

To make use of this template, two GeoJSON files are expected:

"Percelen" file, for defining plots within an area with discrete data, in the form of "plots".

Attribute	Description	Example	Remark
NAAM	The name of the plot.	PERCEEL: 1008	This attribute is not loaded in as attribute, but will be the name of the loaded in data.
PERCEEL	A marker which indicates that this area represents a plot.	1	All areas which are not plots of this kind should either not have PERCEEL as an attribute, or should have it set to 0.
MVH_NAP	Height of the ground level, measured from Amsterdam Ordnance Datum (NAP).	0.45
KLEIDEKM	The depth of the clay soil layer.	0.45
GLG	The average lowest ground water level, in meters as measured from ground level.	0.75	This water level is used by the engine to calculate actual ground water levels, in combination with water level changes.
GHG	The average highest ground water level, in meters as measured from ground level.	0.35	This water level is used by the engine to calculate actual ground water levels, in combination with water level changes.
PEILGEB_N	The identification number of the level area which the plot belongs to.	268
BODEM_N	The type of soil primarily present in the plot	3	1 = peat, 2 = clay, 3 = clay on peat, 4 = sand
SUBSIDENCE	Whether this plot is subject to subsidence.	1	When this attribute is not present, subsidence is calculated. When this attribute is present and it's value is 0, subsidence is not calculated. When this attribute is present and it's value is not 0, subsidence is calculated.
PEIL_LAGER	The level area to which excess water is pumped off.	268	If this value is not present, water is presumed to be pumped out of the plan area.

"Peilgebieden" file, for grouping plots together and setting of water levels, in the form of "level areas".

Attribute	Description	Example	Remark
PEIL_NAAM	The name of the level area.	PEILGEBIED: PG0268	This attribute is not loaded in as attribute, but will be the name of the loaded in data.
PEILGEB	A marker which indicates that this area represents a level area.	1	All areas which are not level areas of this kind should either not have PERCEEL as an attribute, or should have it set to 0.
GEM_PEIL	The average water level in this level area, measured from Amsterdam Ordnance Datum (NAP).	-2.90
PEILGEB_N	The depth of the clay soil layer.	0.45
URBANIZATION	How urban this level area is. Lower values are a more urban area. Higher values are a more rural area.	3

Setting up a new project

Wizard

In the main menu, select the option "Start new project". Choose a name for the new project, and select the RE:PEAT template as the template to use. Select the area you wish to include in your project, and select "Generate Map". Depending on the size and complexity of the selected area, loading in an area may take some time. This step is completed when the 3D world becomes visible.

Loading in data

The GeoJSON files can now be loaded in. It's not required to load them in in any particular order, but loading in the "percelen" file first and the "peilgebieden" file second is preferred. The files can be loaded in by dragging them into the engine, and opting to load them in as areas. Do not merge the polygons. Use the name attribute as the name for the data, and load in all the attributes listed above.

After the data has been loaded in, additional data has to be created. In the menu for areas, the option for creating Border Areas can be selected. This will create the border areas between the various level areas, for calculations of required weirs. The borders have to be created between areas with the "PEILGEB" attribute. The attribute "BORDER" must be added to the new areas. The width of the border area should be set to 30 meters. (The width can also be set to a different value to allow for level areas which are further apart, but this will require adjusting the CONFIG_AUTOMATIC_BORDER_WIDTH global accordingly.)

When all geographical information has been loaded in and/or created, the indicators can be triggered to make use of this data. In the menu for indicators, select the option "Reset X Queries". Wait until the data has been processed, and confirm that all the indicators now start displaying data.

Template Panels

To control the water levels in the project, some generic panels are present in the project. These panels must be applied as part of the setup of the project. For each of the template panels, select the panel, and select "Apply Template". Confirm the creation of the panels. After doing this for each template panel, each template panel should now have a set of child panels, and each of the 4 stakeholders should now have those panels visible in the 3D world.

Tax panels

A few of the stakeholder also have options for setting tax rates from other stakeholders. These are housed in single panels. Each of the tax single panels has 3 attributes, which can be altered to reflect the desired or actual situation:

• TAX_AMOUNT_PER_YEAR is the base amount of money transferred per year between stakeholders.
• TAX_DISPLAYED is the displayed value for this option (for example, the rate per individual household).
• TAX_PERCENTAGE is the percentage difference between options when changing this tax rate.

Overlays

To provide insight into the data in the project, the geographical data can be loaded into overlays. Three overlays should have data added to them:

• Peilgebieden should contain all the areas with the attribute "PEILGEB"
• Percelen should contain all the areas with the attribute "PERCEEL"
• Keringen should contain all the areas with the attribute "BORDER"

For each of these overlays, select the option "Add Areas with Attribute", and select the specified attribute. Depending on the presence of the attributes in other datasets, it is not neccesary to use the "With Value" filter. If the attribute is also present in other datasets but with a value of 0, it would be prudent to set "With Value" to "1".

Year and climate

The subsidence overlay is called the "Bodemdaling" overlay, which is the grid in which the subsidence is calculated. This is done according to the following formula: Subsidence = GLG * a - clay thickness * b - c. The parameters for this formula can be adjusted in the subsidence overlay to configure the climate scenario. The amount of years to consider in the simulation can also be set here. More years means greater subsidence, and more severe consequences.

Exact data calculations

By default the project is set for processing impact sessions. However, the project can also be configured to output more exact data values in its indicators, to be used in data analysis. When the "CONFIG_OUTPUT_TYPE" global is set to "1", several of the indicators will output their information per level area, in exact and absolute values.