Multi-purpose water management development along the Körös-ér, Hungary

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.

The in-depth description of the case study:

cs-hu-03-final_version.pdf

NUTS Code:

Közép-Magyarország

RBD code:

HU1000

Transboundary:

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

Light or indepth?:

In-depth

Mean annual runoff range:

0 - 150 mm

Average slope range:

0-1%

Monitoring maintenance

Monitoring impacts effects:

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

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

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):

Type	Role	Comments
Financing possibilities	main factor
Legal obligations	main factor

Financing:

Type	Comments
EU-funds: Cohesion and regional development funds

Barrier:

Type	Role	Comments
Other	secondary barrier	the counter interest of private land owners along the watercourse to agree on water tolerant land use practices

Driver:

Type	Role	Comments
Legal obligations	main driver

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

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:

Policy pressure:

Policy requirement directive:

Policy impact:

Policy wider plan:

Wider plan type	Wider plan focus	Name	Comments
		Implementation of the WFD

Policy area:

Policy target:

Target purpose
Runoff control
Pollutants Removal
Groundwater Recharge

Design & implementations

Application scale:

River Basin

Installation date:

2011-08

Lifespan:

Performance timescale:

Immediate

Area (ha):

48100

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

Size:

Size unit:

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:

Design consultation activity:

Design land use change:

Design authority:

Authority type	Role	Name	Comments
Other	Determination of design details of the measure	Duna-Ipoly National Park	National Park
Regional / sub-national water authority	Initiation of the measure	Kí¶zép-Tisza-vidéki Vízí¼gyi Igazgatí³ság - Middle Tisza District Water Directorate
Other	Other	Local governments of the area	Local governments, role in public relation
Other	Other	Water Management Association South Pest County	Local water management assotiation, represented farmers' interests

Last updated: 18 Jun 2015 | Top

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Multi-purpose water management development along the Körös-ér, Hungary

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