Tutorial manual for CLUES 1.4
Displaying Model Results
Model results can be displayed as maps, charts or tables. Maps are used to display nutrient loads, yields (N and P) and leaching risk (N). Charts are used to display nutrient loads (N and P), leaching risk (N) and economic indicators. All loads and yields are in-steam values, that is, each sub-catchment has the cumulative value summed for all the upstream river reaches. The legends for maps and charts will automatically be expanded in the TOC. Tables are used to summarise the results by sub-catchment. Both charts and tables are primarily intended as tools to compare the results of different land use scenarios (see Sections 6.2.3 and 6.2.4).
For this example, model results for the streams flowing into the southern part of Raglan Harbour will be displayed.
Maps
There are three types of map available in CLUES 1.4:
• River lines - available for N and P loads and yields;
• Watersheds - available for N and P loads; and
• Total nitrogen loss risk dockable map - the nitrogen loss risk layer (raster) from Ensus.
The map legend for each map type is found under in the TOC which is automatically updated and expanded.
River lines
River line maps highlight the selected stream network with a variable colour scale. They are available for nutrient loads and yields. Yields will automatically be displayed as river lines.
1. Check the River lines radio button under the Display tools.
2. Choose the result to be mapped from the Map variable drop-down menu under Display tools.
3. Click the Map icon under Display tools.
The map selected will be drawn on the display screen. The stream network will be coloured according to the variable chosen and the legend displayed in the TOC under the Streams layer. The variable mapped will appear in the CLUES Display bar.
Watersheds
Watershed maps shade the sub-catchments for the selected river reaches, the map legend is found under the catchment layer in the TOC. Watershed maps are available for nutrient loads. NOTE: yields are automatically mapped as river line maps.
1. Check the Watersheds radio button under the Display tools.
2. Chose the result to be mapped from the Map variable drop-down menu under Display tools and click the Map icon under Display tools.
The sub-catchments selected will be shaded according to the variable chosen and the legend displayed in the TOC under the catchment layer and the variable mapped will appear in the Display bar.
Total nitrogen loss risk
The total nitrogen loss risk map is a dockable window that can be moved around the screen and placed with the TOC as a side window. The map is not confined to the simulated river reaches, that is, it covers the entire extent of the area for which there is spatial data within the map document (in this case Clues_waikato9.2.mxd). If there are two monitors available, the map can be placed on the second screen. The map is rasterised with a spatial resolution of 100 m (1 ha). The map will follow any panning in the main layer map.
1. Select Total Nitrogen loss risk from the Map variable drop-down menu under Display tools and click the Map icon under Display tools.
The total nitrogen loss risk map will appear as a dockable window.
The map can be “docked” to the side...
… or enlarged for better display
Panning will be traced
The map can be left active while working with other display options
Bar charts
Bar charts are available for nutrient loads (N and P), nitrogen loss (leaching) and the economic indicators GDP, FTE and CFS. In each case, bars for each sub-catchment will be drawn on the map layer. The legend for the charts is provided under the catchment layer in the TOC. The primary function of charts is to provide a tool which shows the impacts of land use change compared to the default land use (see Section 6.2.3). For this reason, bar charts have two bars for each sub-catchment. In the case of bar charts created for the default land use (scenario 0), the two bars will be the same.
1. Select the variable to be displayed from the Chart variable drop-down menu under Display tools.
2. Click the Chart icon under Display tools.
The bar charts for the selected sub-catchments will be shown on the main layer display, the legend will appear in the TOC under the catchment layer. The chart variable will appear in the Display bar. There are two bars per sub-catchment, this is to allow comparison with the default land use when other land use scenarios are simulated (see Section 6.2.3). In this case, only the default has been simulated and the bars are the same height for each sub-catchment
Tables
CLUES 1.4 has two types of table to display model results:
• Sub-catchment summary – identifies results (nutrient loads and triple bottom line economic indicators) for a selected river reach sub-catchments; and
• Modelled area summary – gives the modelled nutrient loads for each sub-catchment in the modelled area.
Sub-catchment summary
The sub-catchment summary table gives results for both nutrient transport (N/P loads) and economic indicators (triple bottom output) for individual river reaches. If no new land use scenario has been modelled, the summary table gives the results for the default land use scenario.
• Area of the sub-catchment (ha);
• Economic indicators (CFS, FTE and GDP) calculated by the Harris model;
• The in-stream N load calculated by SPARROW;
• The in-stream P load calculated by SPARROW.
Each sub-catchment must be selected in turn.
1. Click the Identify sub-catchment icon under the Display tools. The cursor will change to a black arrow and question mark.
2. Click on the sub-catchment to be investigated. The catchment summary table will open displaying results for that sub-catchment. The sub-catchment will flash once to show its location. Clicking on other sub-catchments will update the table.
If other land use scenarios have been modelled, the table will also summarise the results for the last model run for the selected scenario, see Section 6.2.4.
Modelled area summary
The modelled area summary table gives the nutrient loads for all the river reaches in the modelled area. The table is an ArcGIS attribute table and gives the following results for the default land use (i.e., current land use provided – scenario 0):
• NZREACH the New Zealand reach identifier of the stream with defines the sub-catchment location;
• Default_N_tpy the in-stream N load (tonnes per year) calculated by SPARROW; and
• Default_P_tpy the in-stream P load (tonnes per year) calculated by SPARROW.
To display the modelled area summary table:
1. Click the Modelled area summary icon under the Display tools.
The summary table will open.
If other land use scenarios have been simulated, the table will also summarise the results for the last model run for the selected scenario, see Section 6.2.4.
2. A copy of this table will be stored in the TOC under the Source tab which will automatically be selected and is available within ArcGIS. The table is also stored in the CLUES 1.4 directory as a text file, the naming convention of the table and file is CLUES_ followed by the date and time of creation encoded as a string.
To re-open the table, right click on the text file listed under the TOC and click the Open command.
The table text file will be updated in the TOC each time a new summary table is brought up. To list previous summary tables in the TOC, click the Add data icon on the ArcGIS Standard Toolbar and select the relevant text file.
Contact for Enquiries
MAF Information Services
Pastoral House
25 The Terrace
PO Box 2526
Wellington, NEW ZEALAND
Fax: +64 4 894 0721
Contact this person
