Open dindiarto opened 6 months ago
@fazamahezs please draft the answers to the questions above, feel free to provide the anwers by adding a comment below
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1. Describe what DEM, canal water level, D, and
elevation-phi are!
a. DEM
First, the model resulted DEM map as it become one of the
input for simulation. This parameter matter because in model, DEM will
represent as the elevation of peat surface. DEM also used as topology
information for canal network to compute how canal water level would be
affected by building a block in any pixel of the canal raster, DEM is necessary
to know the direction of water flow to determine which adjacent pixels are
upstream (and therefore potentially affected by the block).
b. Canal water level
The canal water level represents the water level within the
canal network of the study area. Initially, before the installation of any
canal blocks, this parameter is assumed to have a uniform initial value across
the network. However, after the installation of canal blocks, the canal water
level (CWL) may change due to alterations in water flow and drainage patterns.
This updated information regarding CWL is crucial for the peat hydrological
model, which simulates the water table depth (WTD) and its dynamics within the
peatland ecosystem.
c. D
D is defined as transmissivity of water through the peat
layer. The hydraulic gradient is calculated as the difference between the water
table depth `phi` and the elevation `ele`. This gradient indicates the slope or
direction of water flow within the peat layer. Higher transmissivity values
indicate areas where water can flow more easily through the peat layer, while
lower values indicate areas with more resistance to water flow.
d. Elevation-phi
`elevation-phi` represents the difference between the
elevation `ele` and the water table depth `phi`. This parameter is resulted from
calculation in a raster where each pixel value represents the vertical distance
between the elevation of the terrain and the corresponding water table depth. Areas
with positive values in `elevation-phi` represent regions where dry peat volume
can potentially accumulate. This is because the space above the water table in
these areas can be filled with air, allowing for the preservation of organic
matter and the formation of peat.
The difference between before and after computation results
lies in the transformation of initial conditions and input parameters into
updated values that reflect the model's calculations. Initially, the data
represents the starting state of the system, such as initial water levels.
After computation, these initial conditions are processed by the model to
simulate changes in transmissivity, canal water levels, and the distribution of
dry peat volume. The after computation results also reflect simulated changes,
such as the placement of canal blocking. Overall, the before computation data
establishes a baseline, while the after computation results provide insights
into the dynamic behavior of the system in response to various intervention and
input on environmental conditions.
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2. What are the units for each map, and how should we
interpret them in relation to the water level across the study area?
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3. Describe what the cross-section plot is! How does the
cross-section plot tell us about the peat water level at a certain time and
section of the study area?
The cross-section plot provides a visual representation of
the water table depth variation along a specific transect or line at a
particular time within the study area. The horizontal axis of the plot
represents the distance along the transect, while the vertical axis represent
the elevation of the water table depth with blue lines and the peat surface
with a brown line. Each line on the plot corresponds to a specific day
simulated, showcasing the temporal dynamics of water table depth over time.
Describe what DEM, canal water level, D, and elevation-phi are!
What are the units for each map, and how should we interpret them in relation to the water level across the study area?
Describe what the cross-section plot is! How does the cross-section plot tell us about the peat water level at a certain time and section of the study area?