General National Id HU_03 Site name Körös-ér, Nagykörös town Summary The Körös stream catchment lies in a droughts stricken region of Hungary, it is a heavily modified water body. There are nutrient overload in the stream and in the ground water as well both from point and diffuse sources that are both agricultural and urban. Meanwhile recurring water logging periods cause temporary flood problems for the settlement and the agricultural areas during early spring and in case of torrential rains. The water directorate in order to cope with the situation upgrade of the stream’s water management structures to be able to cope with both water extremes: floods and water shortage. It reconnected former floodplains at the estuary on a 2500 meter section. Also upgraded the sluices to let them able to retain water but cleaned the bottlenecks to facilitate runoff at flood events. At the settlement section of the stream the development targeted to provide the necessary capacity to drain the residential area. Upstream of the settlement retention pond were created to control runoff through the town and store water. Light or indepth? In-depth The in-depth description of the case study cs-hu-03-final_version.pdf NUTS Code Közép-Magyarország RBD code HU1000 Transboundary 0 Data provider Gábor Ungvári, REKK Source(s) KÖRÖS-ÉRI BELVíZFÅCSATORNA MEDERFEJLESZTÉSE ÉS REKONSTRUKCIÓJA Riverbed development and reconstruction of the Körös-stream drainage channel. “ Feasibility study Good practices handbook Yearbook of the Middle Tisza District Water Directorate NWRM(s) implemented in the case study Retention Ponds Floodplain restoration and management Longitude 19.984447 Latitude 47.047282 Site information Climate zone warm temperate dry Mean annual rainfall 300 - 600 mm Mean rainfall unit mm/year Average temperature 10,3000001907349 Mean evaportranspiration 800 Mean evaportranspiration unit mm/year Mean runoff unit 450 - 600 mm Average runoff coefficient 0,25 Average imperviousness 0,25 Type Case Study Info Mean annual runoff range 0 - 150 mm Average slope range 0-1% Monitoring maintenance Monitoring impacts effects 1 Monitoring parameters chemical Performance Performance impact estimation method Catchment outlet Performance impact estimation information Standard water quality monitoring of the water body by the WFD aspects Design & implementations Application scale River Basin Installation date 2011-08 Lifespan 33 Performance timescale Immediate Area (ha) 48100 Area subject to Land use change or Management/Practice change (ha) 5 Size 5 Size unit ha Design capacity description 100000 m3 Constraints Negative way: The watershed belongs to three counties NUTS HU102 , 322, 331, and two different regions HU1, HU3 that belong to two different regional development fund subsidy level. It caused big difficulties and delay to secure EU funding and acknowledge the overstretch characteristic of the project. Favourable preconditions Positive way: The areas that are necessary for the development of the structures belong to public ownership. Upstream from the settlement there is interest for recreational use of the stored water 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 Regional / sub-national water authority Initiation of the measure Kí¶zép-Tisza-vidéki Vízí¼gyi Igazgatóság - Middle Tisza District Water Directorate Other Other Local governments of the area Local governments, role in public relation Other Determination of design details of the measure Duna-Ipoly National Park National Park Other Other Water Management Association South Pest County Local water management assotiation, represented farmers' interests Lessons, risks, implications... Key lessons The development aims to manage both water extreme of a small water course water logging problem in residential and agricultural areas and low water or lack of water in the stream that results in bad water quality due to point and diffuse effluents. The technical elements are necessary, but not sufficient parts of NWRM measures. Using only the limited public lands along the water courses can provide only a limited set of the potential effects. Water quality improvements by natural assimilation needs more surface to interact with the polluted water. EU funds can help overcome the technical shortages, but it can†™t make the interest resolution on a landscape scale avoidable between the different public and private interests. The works are ready to supply the potentially changing demand for more retention. Success factor(s) Success factor type Success factor role Comments Financing possibilities main factor Legal obligations main factor Financing Financing type Comments EU-funds: Cohesion and regional development funds Barrier Barrier type Barrier role Comments Other secondary barrier the counter interest of private land owners along the watercourse to agree on water tolerant land use practices Driver Driver type Driver role Comments Legal obligations main driver Financing share Financing share type Share Comments Policy, general governance and design targets Policy description The Körös stream catchment lies in the most droughts stricken region of Hungary. There are repeating surface water resource shortages, the ground and subsurface water levels are declining at the uppers section. There are nutrient overload in the stream and in the ground water as well both from point and diffuse sources and both agricultural and urban. There are hydro-morphology problems as well. Meanwhile recurring water logging periods cause temporary problems for the settlement and the agricultural areas. Part of wider plan 1 Policy target Target purpose Runoff control Pollutants Removal Groundwater Recharge 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 Implementation of the WFD Policy requirement directive Requirement directive Specification Socio-economic Costs investment 3667000 Costs investment information Present value of the project 5% dc rate 30 year period, 2008 € exchange rate Costs capital 3730000 Costs capital information Project calculations include the estimated cost reduction in operational costs Costs land acquisition 145000 Costs land acquisition unit € (total value) Costs land acquisition information Land value is part of the capital cost, cc 5ha was purchased Costs operation maintenance There are cost savings due to forgone pumping cost 88.800€ (NPV, 5%, 30 year lifespan) Costs operational 25400 Costs operational information The NPV of total maintenance cost 57.100€, but there is a forgone cost of desludging 31.700€ Information on Ecosystem improved biodiversity Ecological status †“ fish population from Tisza re-appeared in previously unreachable sections Biophysical impacts Information on increased water storage Measures impact on groundwater is positive, there are enhanced possibility of infiltration at the retention pond . The reason of applying a closed culvert (among other aspects) across the settlement was the protection of groundwater, because an open watercourse would drain the groundwater at low water periods. Information on runoff reduction Runoff is attenuated by the detention pond upstream the settlement. The flow inside the settlement is controlled by the capacity increase of the crossing culvert. Information on Peak flow rate reduction Peak flow is reduced to the capacity of the detention pond, while other part of the catchment no runoff attenuation developments were made the emphasis was given to the storage areas Information on Maintenance baseflow yes Information on Soil moisture Detention ponds and storage areas will increase infiltration, but only very local effect Information on Water quality overall improvements The detention pond above the settlement will serve as a reserve for dilution when water quality problems arise due to low water quantities in the stream. (The effluent of the town†™s treatment plant discharges into the stream) Information on Soil quality overall soil improvements neutral, no change Full Context Pathway(aka Context) Default view Area(aka Level or Site) ALL