OR/14/010 Using the dataset

Dearden, R A, Tye, A M and Marchant, A. 2014. User guide for the Pipe Leakage Impacts. Nottingham, UK, British geological Survey. (OR/14/010)

Setting up the GIS

To ensure that the dataset is used as designed, follow the proceedings steps to set-up the map:

a) Make sure the required data layers are present. For the summary map, the following GIS layer should be present:

• Leakage_summary

For the detailed map, the following GIS layer should be present:

• Leakage

b) Import the data layers into the GIS software by importing the ArcGIS layer files (named as above). Layer files ensure that the colour and layout of the layers appear as recommended by BGS. For other GIS packages, import the layers manually. A .CSV file is provided with the recommended legend colours.

If you need support setting up the GIS, please contact digitaldata@bgs.ac.uk. The GIS should appear as shown in Figure 1 or 2 (for ArcGIS users).

Using the data

Pan to a location of interest and view each dataset sequentially, following the flow charts shown in Figure 3.

Figure 3    How to use the ‘leakage’ GIS layer.

Explanation of sub-layers

Explanations of the sub-layer descriptions for the ‘leakage’ summary map are provided in Table 1. Explanations of the descriptions in the compress, swell, collapse, runsand, landslide and soluble sub-layers are provided in Tables 2 to 7 below.

Table 1    Summary field — Description of attributes.

Attributes	Definition
Not increased	The potential for ground movement is unlikely to be increased as a result of leaking assets.
Slight increase	The potential for ground movement may be increased slightly as a result of leaking assets.
Moderate increase	The potential for ground movement may be increased moderately as a result of leaking assets.
Significant increase	The potential for ground movement may be increased significantly as a result of leaking assets.

Table 2    Compressibility (Compress) sub-layer — Description of attributes.

Attributes	Definition
Not increased	No increased likelihood of compressibility hazard.
Slight increase	The potential for ground movement may be increased slightly as a result of leaking water pipes.
Moderate increase	The potential for ground movement may be increased moderately as a result of leaking water pipes.

Table 3    Shrink-swell (Swell) sub-layer — Description of attributes.

Attributes	Definition
Not increased	Additional instability due to leaking water pipes unlikely.
Slight increase	The potential for ground movement may be increased slightly as a result of leaking water pipes.
Moderate increase	The potential for ground movement may be increased moderately as a result of leaking water pipes.

Table 4    Collapsible deposits (Collapse) sub-layer — Description of attributes.

Attributes	Definition
Not increased	Additional instability due to leaking water pipes unlikely.
Moderate increase	The potential for ground movement may be increased moderately as a result of leaking water pipes.

Table 5    Running sands (Runsand) sub-layer — Description of attributes.

Attributes	Definition
Not increased	Additional instability due to leaking water pipes unlikely.
Slight increase	The potential for ground movement may be increased slightly as a result of leaking water pipes.
Moderate increase	The potential for ground movement may be increased moderately as a result of leaking water pipes.

Table 6    Landslides (landslide) sub-layer — Description of attributes.

Attributes	Definition
Not increased	Additional instability due to leaking water pipes unlikely.
Moderate increase	The potential for ground movement may be increased moderately as a result of leaking water pipes.
Significant increase	The potential for ground movement may be increased significantly as a result of leaking water pipes.

Table 7    Dissolution (soluble) sub-layer — Description of attributes.

Attributes	Definition
Not increased	Additional instability due to leaking water pipes unlikely.
Moderate increase	The potential for ground movement may be increased moderately as a result of leaking water pipes.
Significant increase	The potential for ground movement may be increased significantly as a result of leaking water pipes.