Drainage management in the city of Hradec Kralove, Czech Republic

General

National Id:

Czeck_01

Site name:

Hradec Kralove is situated at the confluence of rivers the Elbe and Orlice having 7 smaller tributaries.

Summary:

Urban constructions carried out by JVProjektvh which include the removal or sinking of existing curbs, lowering or adjustment of the surface, transfer of storm water from the area of street inlets to decentralized devices, taking apart gutters and street inlets within green areas.

NUTS Code:

Severovýchod

RBD code:

CZ_5000

Transboundary:

Data provider:

Jovanka Ignjatovic

Source(s):

Drainage Area Study of the city of Hradec Kralove, Czech Republic, and its utilization for urban planning

Drainage area study of Hradec Kralove

NWRM(s) implemented in the case study:

Filter Strips

Longitude:

15.82305

Latitude:

50.2105

Site information

Climate zone:

cool temperate moist

Mean rainfall:

474,200012207031

Mean rainfall unit:

mm/year

Average temperature:

7,40000009536743

Average runoff coefficient:

0,800000011920929

Type:

Modelled/Simulated Example

Light or indepth?:

Light

Monitoring maintenance

Monitoring parameters:

Current status of stormwater management

Performance

Performance impact estimation method:

Unknown

Performance impact estimation information:

The DAS HK incorporated extensive monitoring and surveys (rainfall, water levels, discharges, water quality parameters, ecological status of streams, catchment hydrogeology and infiltration potential etc.) Hydrodynamic modeling of the sewer system, water bodies, artificial open channels, underground waters and elements of stormwater management was performed (MIKE Urban, MIKE11) and hydraulic capacity of the individual parts of the system as well as flooding frequency was assessed based on a 10-years rainfall data series. CSOs impacts were assessed with REBEKAII. Paralelly, a groundwater flow model was created by Jacobs Consultancy.

Biophysical impacts

Information on retained water:

N/A info

Information on increased water storage:

Not increased the volume stored, technical measures in the planned development aim at approaching pre-urbanization runoff conditions (similar hydrograph volume and shape).

Information on runoff reduction:

Improved runoff control by measures in the catchment, sewer system and open channels

Water quality overall improvements:

Not relevant for this application

Information on Water quality overall improvements:

N/A info

Soil quality overall soil improvements:

Not relevant for this application

Information on Soil quality overall soil improvements:

N/A info

Lessons, risks, implications...

Key lessons:

Study showd that: - storm water management must be integrated into urban planning to guarantee sustainable development of the city; - transparent step-by-step guidelines specifying activities and responsibilities at each level of urban planning from the stormwater management point of view must be prepared; - this tipe of projects went beyond the current Czech legislation and can serve as a good example for similar studies.

Success factor(s):

Type	Role	Comments
Existing staff and consultant knowledge	main factor	Decision support for city authorities and the building politics in terms of sustainable stormwater management were provided
Available support tools	secondary factor	For the sewer network evaluation, a model from the Drainage Masterplan from 2005 was available

Financing:

Type	Comments
Other	N/A info

Barrier:

Type	Role	Comments
Legal obligations / restrictions	secondary barrier	Due to water management restrictions, urbanization is limited to some areas.

Driver:

Type	Role	Comments
Past flooding events	main driver	Events exceeding the limit of the open channel
Public pressure	secondary driver

Socio-economic

Direct benefits information:

Reduction of the impervious area of the existing development by 15%; Long-term conception of the city stormwater drainage respecting sustainability principles Link rules and criteria of sustainable stormwater management within the region with the new City Development Plan

Ancillary benefits information:

The attitude towards stormwater management has started to change towards sustainability

Costs investment information:

There are no information at this stage

Costs operation maintenance:

There are no information at this stage

Costs total information:

There are no information at this stage

Information on Ecosystem improved biodiversity:

N/A info

Information on Ecosystem provisioning services:

N/A info

Ecosystem impact climate regulation:

Not relevant for the specific application

Information on Ecosystem impact climate regulation:

N/A info

Policy, general governance and design targets

Policy description:

Mising sustainable urban drainage systems (exceptions: rare individual projects and EU financed projects)

Part of wider plan:

Policy pressure:

Policy requirement directive:

Policy impact:

Policy wider plan:

Wider plan type	Wider plan focus	Name	Comments
Local	Urban	City Development Plan	These areas were determined in the catchment and incorporated into the new City Development Plan processing

Policy area:

Policy target:

Target purpose
Runoff control

Design & implementations

Application scale:

City

Installation date:

2011-03

Lifespan:

Age:

Performance timescale:

1 - 4 years

Area (ha):

24300

Area subject to Land use change or Management/Practice change (ha):

24300

Size:

332

Size unit:

Design capacity description:

96000 inhabitants city; the maximum specific regulated discharge from the ground plot: 3 l/(s.ha)

Basis of design:

Return period for the design of retention volume: 5 years

Constraints:

The past few decades, Hradec Kralove has suffered from massive urbanization resulting in overloading of the system of natural and artificial water bodies as well as of the sewer system.

Favourable preconditions:

Hradec Kralove was planned as a green city before the Second World War by architect Josef Gocar. Today, it is still an excellent example of clever urban planning. Stormwater drainage was solved as a first priority before starting planning the urbanization itself. Gocar designed a system combining natural water bodies and open vegetated channels. Moreover, infiltration systems were created in some areas.

Design contractual arrangement:

Design consultation activity:

Design land use change:

Design authority:

Authority type	Role	Name
Local water authority	Initiation of the measure	Municipality of Hradec Kralove
	Monitoring	DHI
	Implementation	JVProjectVH

Last updated: 12 Jan 2015 | Top

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Drainage management in the city of Hradec Kralove, Czech Republic

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