This report has been submitted in support of an application to discharge condition no 5 of the
Approval Notice Ref W/14100930/PN dated 09/10/14.
The site lies to the east of Upton Snodsbury Road, comprising of 1.3 hectares of agricultural land.
It falls outside but adjacent to the settlement boundary for Pinvin and was allocated for residential development in the emerging south Worcestershire development plan.
The approved scheme is for a residential development comprising of 33no dwellings and also a new vehicular access and associated works
The scheme will incorporate a mix of dwelling sizes ranging from 1 to 5 bedroom properties with new access points created off Upton Snodsbury Road.
The demand for water continues to rise due to increasing numbers of people, establishments and activities. Currently households use 56% of water supplied through the mains water system.
The current UK average consumption of fresh water is 150 litres per person per day (l/p/d).
Climate change is likely to affect the water cycle. The risk of drought may increase, leading to increase water stress. More intensive rainstorms could lead to increased surface run-off and flooding. This water strategy presents the proposed development’s approach to:

Reducing flood risk and adapting to climate change;

Reducing and managing surface water run-off;

Reducing domestic water use
Sustainable water management practices contribute positively to the objectives of sustainable development. These practices may be delivered through commitments to reducing water consumption through specification of water efficient technologies at the design stage and through improved ongoing water management. Opportunities for increased water management and best practice have also been identified.
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Applications and planning for development must be considered against a risk-based search sequence, as provided by paragraphs 99-104 of the NPPF and Technical Guidance to the NPPF –
Development and Flood risk. In terms of flooding from rivers, the guidance categorises flood zones in three principal levels of risk:
Flood Zone
Zone 1: Low Probability
Zone 2: Medium Probability
Zone 3: High Probability
Annual probability of Flooding
≤ 0.1%
01 – 1.0%
≥ 1%
In terms of flood risk, the proposed development lies in Flood Zone 1.
Issues of flooding and drainage on site have been assessed in a stand alone Flood Risk
Assessment (FRA) and together with issues of water quality.
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Reducing and managing surface water run off
The scheme has been designed to avoid significant hydrological effects resulting from changes in the catchments drainage characteristics. The proposal will provide for reduction in the surface run-off as required by the Environmental Agency and reflect Green Field rates.
Urbanisation of catchments can increase peak storm water discharge from an area due to the accelerated run-off associated with hard paved areas, with resulting increase in flood risk.
To mitigate against the potential impact of development on the baseline hydrological characteristics, it is important that the drainage provision is designed to reflect the predevelopment conditions.
A large balancing pond has been provided within the development to reduce the amount of hard paved surfaces and associated storm water run-off issues. This has been designed for storm events up to the 1 % probability event (1 in 100 years) in order to restrict the developed run off.
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By introducing Sustainable Drainage Systems (SUDs) measures, the design takes account of the potential accelerated run-off and reduced times associated with hard paved areas. This avoids increasing peak storm water and discharge and consequential flood risks.
The SUDs system will be maintained by way of an appropriate management scheme operated by the either the Parish Council or alternatively a private management company, subject to prior agreement.
To mitigate against the risks of pollutants being conveyed to surface and ground water, it is proposed to implement measures from current best practice surface water management guidance. All parking areas and roadways within the development will have impermeable paved surfaces due to the impermeable nature of the sub-soil, following on-site percolation tests.
Water discharge from such areas will be collected efficiently and receive one or two-stage passive treatment to improve water quality as part of a sustainable drainage system.
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Reducing Domestic Water Use
It is proposed for the whole building (house) standard performance for potable water use to be set at 105 litres per person per day as recommended by the BREEAM Code for Sustainable
Homes Technical Guide in order to achieve Code level 3. This corresponds to approximately 45 litres saving per person per day, or a 30% decrease form the national water consumption average. This will be achieved by adopting the following measures:
Low flush Volume WC’s – Low flush toilet water by reducing the volume of water being flushed down the toilets. Although low reservoirs and / or high-pressure flush toilets are now available, the most common and practical technology is the dual-flush toilet, which used differential flush volumes according to needs.
Low Flow Showers and baths – Low flow rate showers are available in the UK, although there is a minimum threshold flow rate for comfort. Choosing water efficient taps can also achieve water reduction; baths can also be designed to lower depths to reduce water use.
Kitchen and Utility Rooms – Water efficient taps in kitchens can also significantly reduce water volumes and thus water consumption. Innovation in white good appliances, such as water efficient appliances, can also contribute to a reduction in water consumption.
Rainwater - The most common use of rainwater is for gardening purposes, through the use of water butts which are proposed to be installed on the development (to the affordable units only).
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