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. Light or indepth? Light NUTS Code Severovýchod RBD code CZ_5000 Transboundary 0 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 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 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. Design & implementations Application scale City Installation date 2011-03 Lifespan 50 Age 2 Performance timescale 1 - 4 years Area (ha) 24300 Area subject to Land use change or Management/Practice change (ha) 24300 Size 332 Size unit km 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 Arrangement type Responsibility Role Comments Name Design consultation activity Activity stage Key issues Name Comments Design land use change Land use change type Design authority Authority type Role Responsibility Name Comments Local water authority Initiation of the measure Municipality of Hradec Kralove Monitoring DHI Implementation JVProjectVH 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) Success factor type Success factor role Comments Existing staff and consultant knowledge main factor Available support tools secondary factor Financing Financing type Comments Other N/A info Barrier Barrier type Barrier role Comments Legal obligations / restrictions secondary barrier Due to water management restrictions, urbanization is limited to some areas. Driver Driver type Driver role Comments Past flooding events main driver Events exceeding the limit of the open channel Public pressure secondary driver Financing share Financing share type Share Comments 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 1 Policy target Target purpose Runoff control Policy pressure Pressure directive Relevant pressure Policy area Policy area type Policy area focus Name Comments Policy impact Impact directive Relevant 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 requirement directive Requirement directive Specification 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 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 Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL