Hydrological Analysis Using Whitebox Geospatial Analysis Tools - Revision history

Smitch: /* Watershed */

2018-01-03T21:06:54Z

Watershed

Smitch: /* Pour Points */

2018-01-03T21:05:43Z

Pour Points

Smitch: /* Pour Points */

2018-01-03T21:03:57Z

Pour Points

Calvin Gale: /* Hydrological Analysis */

2017-12-22T22:19:19Z

Hydrological Analysis

Calvin Gale: /* Getting Started */

2017-12-22T22:17:57Z

Getting Started

Calvin Gale: /* Acquiring and Installing Whitebox 3.4.0 */

2017-12-22T22:17:33Z

Acquiring and Installing Whitebox 3.4.0

Calvin Gale: /* Watershed Analysis */

2017-12-22T22:16:08Z

Watershed Analysis

Calvin Gale: /* Sub-basins */

2017-12-22T22:09:53Z

Sub-basins

Calvin Gale: /* Extract Streams */

2017-12-22T22:07:54Z

Extract Streams

Calvin Gale: /* Isobasin */

2017-12-22T22:05:54Z

Isobasin

@@ Line 294: / Line 294: @@
 [[File:WatershedMsg.PNG|800px]]
-The output of this tool is displayed below. This shows 10 watershed ares, corresponding to the locations that the pour points were located. Each of these watersheds also conserve the value that it's pour point had, meaning that any hierarchy or numbering system will be kept.
+The output of this tool is displayed below. This shows 10 watershed ares, corresponding to the locations that the pour points were located. Each of these watersheds also conserve the value that its pour point had, meaning that any hierarchy or numbering system will be kept.
 The number and location of your watershed areas will differ as a result of the different pour points used.

@@ Line 258: / Line 258: @@
 [[File:ModifyPixelTool.png]]
-After clicking this button your cursor will become a cross-hair when mousing over your data frame. The center of this cross-hare is the location of the pixel that will be altered using this tool.
+After clicking this button your cursor will become a cross-hair when mousing over your data frame. The center of this cross-hair is the location of the pixel that will be altered using this tool.
 Click on a location along the stream network, such as the location displayed below.

@@ Line 280: / Line 280: @@
 [[File:SnapPourPoints.PNG]]
-The dialog box for this tool is displayed below. The input outlets file should be set to the output from the create blank outlet rater tool that you have just modified (OutletRaster.dep). The input streams raster should be set to the output from the extract streams tool (ExtractStreams.dep). The output should be set to the DataProducts folder and named something similar to "PourPoints.dep". After these inputs have been set click "Run" in the bottom left of the popup window.
+The dialog box for this tool is displayed below. The input outlets file should be set to the output from the create blank outlet raster tool that you have just modified (OutletRaster.dep). The input streams raster should be set to the output from the extract streams tool (ExtractStreams.dep). The output should be set to the DataProducts folder and named something similar to "PourPoints.dep". After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:SnapPourPointsMsg.PNG|800px]]

@@ Line 140: / Line 140: @@
 The dialog box that appears for this tool is shown below. The input file should be set to the original Calabogie DEM, and the output should be set to the DataProducts folder and named something similar to "FillDepressions.dep".
-The "flat increment value" is the step value added to cells within a flat area in order to ensure that they have a slight slope instead of remaining flat. This was kept at the default value of "0.001". After these inputs have been set click "Run" in the bottom left of the popup window
+The "flat increment value" is the step value added to cells within a flat area in order to ensure that they have a slight slope instead of remaining flat. This was kept at the default value of "0.001". After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:FillDepressions.PNG]]
@@ Line 158: / Line 158: @@
 [[File:FlowPointer.PNG]]
-The dialog box for this too is shown below. The input DEM raster file should be set to the output from the Fill Depressions tool (FillDepressions.dep), and the output should be set to the DataProducts folder and named something similar to "FlowPointer.dep". After these inputs have been set click "Run" in the bottom left of the popup window
+The dialog box for this too is shown below. The input DEM raster file should be set to the output from the Fill Depressions tool (FillDepressions.dep), and the output should be set to the DataProducts folder and named something similar to "FlowPointer.dep". After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:FlowPointerMsg.PNG|800px]]
@@ Line 176: / Line 176: @@
 [[File:FlowAccumulation.PNG]]
-The dialog box for this tool is displayed below. The input D8 flow pointer raster file should be set to the output from the D8 flow pointer tool (FlowPointer.dep), and the output should be set to the DataProducts folder and named something similar to "FlowAccumulation.dep". In the example the "Output Type" was set to "number of upslope grid cells" so that a greater cell value in the output would correspond to a greater number of cells flowing through that cell. The "Log-transformed flow accumulation values?" box was left unchecked in this example, though checking this would help normalize the data for better display. After these inputs have been set click "Run" in the bottom left of the popup window
+The dialog box for this tool is displayed below. The input D8 flow pointer raster file should be set to the output from the D8 flow pointer tool (FlowPointer.dep), and the output should be set to the DataProducts folder and named something similar to "FlowAccumulation.dep". In the example the "Output Type" was set to "number of upslope grid cells" so that a greater cell value in the output would correspond to a greater number of cells flowing through that cell. The "Log-transformed flow accumulation values?" box was left unchecked in this example, though checking this would help normalize the data for better display. After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:FlowAccumulationMsg.PNG|800px]]
@@ Line 193: / Line 193: @@
 The dialog box for this tool is displayed below. The input D8 flow pointer raster file should be set to the output from the D8 flow pointer tool (FlowPointer.dep), and the input contributing area file sould be set to the output from the D8 and Rho8 Flow Accumulation tool (FlowAccumulation.dep). The output should be set to the DataProducts folder and named something similar to "Isobasin.dep".
-For this example the "Target Basin Size" was set to 500,000 cells. This value was found using trial an error to find an output that looked appropriate. After these inputs have been set click "Run" in the bottom left of the popup window
+For this example the "Target Basin Size" was set to 500,000 cells. This value was found using trial an error to find an output that looked appropriate. After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:IsobasinMsg.PNG|800px]]
-The output from this look is displayed below. It can be seen that the area has been broken down into 11 different basins of approximately equal size. It also appears that the basins do not fill the entire study area. This is likely because no more basins of a size of 500,000 cells could be fit into these areas. If the target basin size was set to a lower number these basins would conform to the study area more completely
+The output from this look is displayed below. It can be seen that the area has been broken down into 11 different basins of approximately equal size. It also appears that the basins do not fill the entire study area. This is likely because no more basins of a size of 500,000 cells could be fit into these areas. If the target basin size was set to a lower number these basins would conform to the study area more completely.
 [[File:IsobasinOtp.PNG|800px]]
@@ Line 210: / Line 210: @@
 [[File:ExtractStreams.PNG]]
-The dialog box for this tool is displayed below. The input flow-accumulation raster file should be set to the output from the D8 and Rho8 Flow Accumulation (D8 and Rho8 Flow Accumulation), and the output should be set to the DataProducts folder and named something similar to "ExtractStreams.dep". The "Channelization Threshold" is the cutoff value that will be used to determine which cells are a stream and which cells aren't. Trial and error was used to determine a value that produced an appropriate stream network. A value of 50,000 was settled on. The "Background Value" was set to "NoData" so that all of the cells that were not streams would be transparent. After these inputs have been set click "Run" in the bottom left of the popup window
+The dialog box for this tool is displayed below. The input flow-accumulation raster file should be set to the output from the D8 and Rho8 Flow Accumulation (D8 and Rho8 Flow Accumulation), and the output should be set to the DataProducts folder and named something similar to "ExtractStreams.dep". The "Channelization Threshold" is the cutoff value that will be used to determine which cells are a stream and which cells aren't. Trial and error was used to determine a value that produced an appropriate stream network. A value of 50,000 was settled on. The "Background Value" was set to "NoData" so that all of the cells that were not streams would be transparent. After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:ExtractStreamsMsg.PNG|800px]]

@@ Line 60: / Line 60: @@
 ===Launching Whitebox 3.4.0===
-After the file has been extracted the contents should look similar to the image below
+After the file has been extracted the contents should look similar to the image below.
 [[File:FileContents.PNG]]
@@ Line 71: / Line 71: @@
 For this Tutorial I created a working directory before starting any analysis processes. This step is not necessary, though it will aid in the organization of this project.
 Create a folder called "WhiteboxTutorial", or something similar.
-Within this folder create one folder called "Data", and another called "DataProducts"
+Within this folder create one folder called "Data", and another called "DataProducts".
 The final product will look like the image below.
@@ Line 83: / Line 83: @@
 ===Adding Elevation Data and Saving the Map Project===
-To add the elevation data to the project select the icon in the top left of the Whitebox window, highlighted in red in the image below. (or use the hotkey Ctrl + L)
+To add the elevation data to the project select the icon in the top left of the Whitebox window, highlighted in red in the image below. (or use the hotkey Ctrl + L).
 [[File:AddData.png]]
@@ Line 98: / Line 98: @@
-To save your project select "Save Map" under the "Cartography" tab. (or use the hotkey Ctrl + S)
+To save your project select "Save Map" under the "Cartography" tab. (or use the hotkey Ctrl + S).
 [[File:SaveMap.png]]

@@ Line 55: / Line 55: @@
 After the correct .zip file has been downloaded and extracted to your directory of choice the installation process is complete.
-It is important that your machine has version 8 or higher of the Java SE Runtime Environment before trying to run Whitebox. This can be acquired [http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html here]
+It is important that your machine has version 8 or higher of the Java SE Runtime Environment before trying to run Whitebox. This can be acquired [http://www.oracle.com/technetwork/java/javase/downloads/jre8-downloads-2133155.html here].
 ==Getting Started==

@@ Line 240: / Line 240: @@
 There is no way to create a pour point file in Whitebox automaticaly, so this must be done manualy.
-Te first step in making a pour point file is to make a blank file. This is accieved using the "Create Blank Outlet Raster" tool, which creates a file that is identical to the input file, except that every cell contains "NoData" values .
+The first step in making a pour point file is to make a blank file. This is achieved using the "Create Blank Outlet Raster" tool, which creates a file that is identical to the input file, except that every cell contains "NoData" values.
 The location of this tool is displayed in the following image.
@@ Line 246: / Line 246: @@
 [[File:BlankOutletRaster.PNG]]
-The dialog box of this tool is displayed below. The input raster file should be set to the original Calabogie DEM file and the output should be set to the DataProducts folder and named something similar to "OutletRaster.dep"
+The dialog box of this tool is displayed below. The input raster file should be set to the original Calabogie DEM file and the output should be set to the DataProducts folder and named something similar to "OutletRaster.dep". After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:BlankOutletRasterMsg.PNG|800px]]
@@ Line 252: / Line 252: @@
 The output of this tool will be a blank raster file.
-Pour points must now be identified and added. Before this could be done, the layers in the data tab had to be set up. I made sure that only the extract streams output and the create blank outlet raster output were visible, and that only the create blank outlet raster output was highlighted in the layer list.
+Pour points must now be identified and added. Before this can be done, the layers in the data tab have to be set up. I made sure that only the extract streams output and the create blank outlet raster output were visible, and that only the create blank outlet raster output was highlighted in the layer list.
 Next the Modify Pixel Values tool must be used. The location of this tool is displayed below.
@@ Line 280: / Line 280: @@
 [[File:SnapPourPoints.PNG]]
-The dialog box for this tool is displayed below. The input outlets file should be set to the output from the create blank outlet rater tool that you have just modified (OutletRaster.dep). The input streams raster should be set to the output from the extract streams tool (ExtractStreams.dep). The output should be set to the DataProducts folder and named something similar to "PourPoints.dep"
+The dialog box for this tool is displayed below. The input outlets file should be set to the output from the create blank outlet rater tool that you have just modified (OutletRaster.dep). The input streams raster should be set to the output from the extract streams tool (ExtractStreams.dep). The output should be set to the DataProducts folder and named something similar to "PourPoints.dep". After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:SnapPourPointsMsg.PNG|800px]]
@@ Line 290: / Line 290: @@
 [[File:Watershed.PNG]]
-The dialog box for this tool is displayed below. The D8 flow pointer raster file should be set to the output from the D8 flow pointer tool (FlowPointer.dep). The pour point file should be set to the output from the Jenson snap pour points tool (PourPoints.dep). The output should be set to the DataProducts folder and named something similar to "Watershed.dep".
+The dialog box for this tool is displayed below. The D8 flow pointer raster file should be set to the output from the D8 flow pointer tool (FlowPointer.dep). The pour point file should be set to the output from the Jenson snap pour points tool (PourPoints.dep). The output should be set to the DataProducts folder and named something similar to "Watershed.dep". After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:WatershedMsg.PNG|800px]]
-The output of this tool is displayed below. This shows 10 watershed ares, corresponding to the locations that the pour points were located. Each of these watersheds also conserves the value that it's pour point had, meaning that any hierarchy or numbering system will be kept.
+The output of this tool is displayed below. This shows 10 watershed ares, corresponding to the locations that the pour points were located. Each of these watersheds also conserve the value that it's pour point had, meaning that any hierarchy or numbering system will be kept.
 The number and location of your watershed areas will differ as a result of the different pour points used.

@@ Line 220: / Line 220: @@
 ===Sub-basins===
-The sub-basin tool breaks the down the study area into a number of basins, with one basin fore each segment of a stream network for the area. as a result each of these basins represent the catchment area for each segment of the river network.
+The sub-basin tool breaks the down the study area into a number of basins, with one basin for each segment of a stream network for the area. As a result each of these basins represent the catchment area for each segment of the river network.
 The location of this tool is displayed below.
@@ Line 226: / Line 226: @@
 [[File:Subbasins.PNG]]
-The dialog box for this tool is displayed below. The input streams raster file should be set to the output from the extract streams tool (ExtractStreams.dep), and the input D8 flow pointer raster should be set to the output from the D8 flow pointer tool (FlowPointer.dep). The output should be set to the DataProducts folder and named something similar to "Subbasins.dep".
+The dialog box for this tool is displayed below. The input streams raster file should be set to the output from the extract streams tool (ExtractStreams.dep), and the input D8 flow pointer raster should be set to the output from the D8 flow pointer tool (FlowPointer.dep). The output should be set to the DataProducts folder and named something similar to "Subbasins.dep". After these inputs have been set click "Run" in the bottom left of the popup window.
 [[File:SubbasinsMsg.PNG|800px]]