Hydro-Logic is now part of Hydro International.

Water Resources Modelling Case Studies

Severn-Trent Water Ltd, 2012
Reservoir Control Curve Review

In May 2012, HLS was appointed by Severn-Trent Water (STW) to undertake a review of the control curves applying to five of its reservoirs. Reservoir control curves play a key role in the operation of reservoirs by defining their resource state. They govern the reservoir abstraction and release regimes on a daily basis. They are also crucial to the medium-term reservoir management strategy by triggering a range of demand management measures. Ultimately they are a key metric in informing water company Drought Plans and Water Resource Management Plans.

South Staffs plc, 2012
Aquator Water Resource Model Development

In January 2012, HLS was appointed by South Staffs Water plc (SSW) to undertake a multistage water resource modelling project in support of its water resource planning activities. The project involved use of Aquator.

Severn-Trent Water Ltd, 2012
Aquator Water Resource Model Development

In January 2011, HLS was appointed, in conjunction with Oxford Scientific Software, to redevelop Severn-Trent Water’s (STW) Aquator based water resource models. Previous work undertaken on behalf of STW had resulted in the Severn-Trent supply region being divided into 15 Water Resource Zones (WRZ). This was consistent with the Environment Agency definition of a WRZ as “3 the largest possible zone in which customers share the same risk of a resource shortfall”.

Severn-Trent Water Ltd, 2012-2015
Aquator Water Resource Modelling- River Wye

HLS was appointed by Severn-Trent Water (STW) to undertake a series of projects in between 2012 and 2015 to examine the effects of changes in the River Wye licence regime on the STW Aquator model. The driver for this was the review of consents on the Wye by Natural Resources Wales under the Habitats Directive, and input from the Wye and Usk Foundation (WUF). This concluded with a number of licence and operational changes that impact STW with respect to their operations on the River Wye and the Elan Valley reservoir group.

HLS Research and Development
Water Quality Modelling of Fish Kills

Water pollution-driven fish kill incidents are a feature of many water bodies. This is an issue for the River Tame in Birmingham, like many urban and rural rivers. During storms, pollution flushes into the river. It has been observed that this pollution results in infrequent, critically low dissolved oxygen (DO) levels and fish kills in the catchment area. The project investigated the infrequent DO sag problem in the River Tame using water quality modelling techniques.

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