The RHS Toolbox version 1.4 has several new major features.
Automated map data extraction for sites in England, Wales and Scotland (only available to licenced users)
To be able to run a context analysis with the RHS Toolbox, you need to derive altitude, slope, distance to source and height of source to calculate the PCA score for your site that will be used to select sites of similar types (see Jeffers, 1998 in References and Context analysis).
Using the RHS Toolbox, you can now automatically extract this information using a database of previously derived point on the river network. A form will display all nearby points using the mid-site grid reference and you will be able to map them to decide which one to choose for your site (see below). This feature is only available to licenced users and is not available to trial versions.
The process will not only extract data on for PCA score calculation but also background information on geology, sinuosity, typology using the Jeffers types (1998) and also predictions for four hydromorphological indices (Indices) in semi-natural conditions. This will enable the calculation of Hydromorphological Impact Ratio indices for your site to assess departure from semi-natural conditions (see below).
A series of indices and fields have been added to the interface.
Hydromorphological Impact Ratios
Provided your site is located in Great Britain, the software will extract predictions for four hydromorphological indices (Appendix 2) at semi-natural conditions (the 'expected' column in the figure below). These indices were derived as part of a research project (Naura et al ms). The RHS Toolbox will then calculate Hydromorphological Impact Ratios (HIR) for each index.
HIRs represent the level of departure from semi-natural condition (or impact) for each index compared to the maximum level of departure (or maximum possible impact) that could be expected (see figure below). The HIRs are expressed as percentage values from 0% (no impact) to 100% (maximum possible impact). The site HIR represents the maximum possible impact for any of the four indices categorised into 12.5% classes:
Agricultural fine sediment load and potential risk to biota
Provided your site is located in Great Britain, the software will extract information on agricultural fine sediment delivery to your site in tonnes per year and derive a series of indices representing Agricultural Sediment Load (ASL), Fine Sediment Accumulation (FSA) and overall Agricultural Sediment Risk (ASR). These indices were derived as part of research for the UK government and published in 2016 (Naura et al 2016).
Total agricultural fine sediment delivery represent all fine sediments transported from upstream in the water column and local sediment delivery through run-off and tributary inputs. The data are derived using modelling but can be entered by hand by the user.
Local agricultural fine sediment delivery represent all fine sediments delivered through run-off and tributary inputs.
The Fine Sediment Accumulation index is derived directly from your RHS site spot-check data for channel substrate. Sites will be categorised according to the number of spot-checks with silt, sand or clay as:
The ASR combines the FSA and ASL using a matrix
Convert latitude/longitude to British Grid References
You can now convert latitudes and longitudes into NGR. Simply select the OSGB36 grid reference system in page 1 and it will offer you to do the conversion.
A similar conversion to Irish NGR is not yet possible as there is a bug in the library file provided for which we are waiting for a fix.
Sharing your data on a network drive (only available for site licences)
It is now possible to share the back-end user database on a network drive (see Network drive). To do so, you need a network licence.
Bug fixing and code improvements
A series of bugs have been fixed and some improvements to the software interface and code were made.
Previous versions update history
Data import from the new Android RHS mobile app
The RHS Toolbox can now automatically import data an photo links from the newly developed RHS mobile Android app.The switchboard features an import button that automates the process of inputting the data from the RHS mobile export file as well as indexing photos and other additional files.
Data export to multiple formats
You can now export RHS data from single or multiple sites to Excel, rtf, txt, pdf or html formats.
Bug fixing and code improvements
A series of bugs on the calculation of scores have been fixed. We recommend that you re-run index score calculation for all your previous files.
The QA code and procedures were also improved amd new procedures were added. The information window now stays on after the QA and can be opened separately as a popup window by double-clicking it.
Context analysis with export function
When running a context analysis, the software now stores median values for HQA scores in the database. You can access these scores by exporting the data using the new export functionality.
Also, the software now enables users to export the data from the 150 sites that were used for the derivation of HQA class to Excel so that additional analyses can be performed.
A series of indices and fields have been added to the interface. Provided you input Qmed discharge and measurement data are adequate (i.e. a bankfull has been identified), the software will calculate stream power and shear stress values as well as width/depth ratio..
A new Riparian Quality Index was added to the index calculation procedure. Th index assesses riparian quality using measures of complexity, naturalness and continuity.
New survey formats
The RHS Toolbox now offers to input data using three survey formats:
The three format are described in the survey format menu (see below)