Restoration of Szaporca oxbow system at Drava River - Life Drau
Restoration of Szaporca oxbow system at Drava River - Life Drau
Restoration of Szaporca oxbow system at Drava River - Life Drau
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<strong>Restor<strong>at</strong>ion</strong> <strong>of</strong> <strong>Szaporca</strong> <strong>oxbow</strong><br />
<strong>system</strong> <strong>system</strong><strong>at</strong> <strong>at</strong> <strong>Drava</strong> <strong>River</strong><br />
András Tálos<br />
South South-Transdanubian Transdanubian Environment Protection and W<strong>at</strong>er<br />
Management Director<strong>at</strong>e<br />
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Pécs écs<br />
Hungary
N<strong>at</strong>ural <strong>at</strong>ural fe<strong>at</strong>ures <strong>of</strong> Hungary<br />
• Basin character:<br />
Carp<strong>at</strong>hian Basin<br />
• 94 % <strong>of</strong> the surface<br />
w<strong>at</strong>er comes from<br />
neighbouring countries<br />
concerning rivers<br />
• Main rivers: Danube, Tisza and <strong>Drava</strong><br />
• Main lakes: Lake Bal<strong>at</strong>on, Lake Velence, Lake Fertő<br />
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South South-Transdanubian Transdanubian Environment Protection<br />
and W<strong>at</strong>er Management Director<strong>at</strong>e<br />
Managed Area<br />
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• 12 special agencies <strong>of</strong><br />
regionaladministr<strong>at</strong>ion<br />
• Not authorities<br />
• 187 employees <strong>at</strong> our<br />
Director<strong>at</strong>e
Counties:<br />
Somogy<br />
Baranya aranya<br />
Tolna<br />
Managed Area<br />
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Area: ~ 10,000 km2<br />
Settlements: 550<br />
Popul<strong>at</strong>ion: ~ 730,000
Vice Director, Engineering<br />
Dep. <strong>of</strong> <strong>River</strong> Basin<br />
Management and Monitoring<br />
Dep. <strong>of</strong> Environment Protection<br />
and Public W<strong>at</strong>er Services<br />
Dep. <strong>of</strong> W<strong>at</strong>er Damage<br />
Prevention<br />
Local Eng. <strong>of</strong> Pécs<br />
Local Eng. <strong>of</strong> Kaposvár<br />
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Structure <strong>of</strong> the Director<strong>at</strong>e<br />
Director<br />
Independent Internal<br />
Auditors<br />
PR Office and<br />
Secretari<strong>at</strong><br />
Dep. <strong>of</strong><br />
Administr<strong>at</strong>ion<br />
Vice Director,<br />
Finance<br />
Dep. <strong>of</strong> Finance<br />
Dep. <strong>of</strong> Assets<br />
and Tendering<br />
Dep. <strong>of</strong><br />
Inform<strong>at</strong>ion<br />
Technology
Management tasks:<br />
• Flood protection<br />
• Maintenance <strong>of</strong> rivers<br />
• W<strong>at</strong>er resource<br />
management<br />
• <strong>River</strong> basin management<br />
• Hydrological monitoring<br />
Our Tasks<br />
Expert assistance in st<strong>at</strong>e and EU administr<strong>at</strong>ion<br />
Services, consulting<br />
N<strong>at</strong>ional and intern<strong>at</strong>ional tenders (INTERREG, SEE, CE<br />
projects)<br />
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• Regional charges with public<br />
w<strong>at</strong>er utilities and waste w<strong>at</strong>er<br />
• Ship navig<strong>at</strong>ion assignment<br />
• Implementing <strong>of</strong> WFD
Loc<strong>at</strong>ion <strong>of</strong> <strong>Szaporca</strong> Oxbow System<br />
More than 20 <strong>oxbow</strong>s<br />
along <strong>Drava</strong> <strong>River</strong>!<br />
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At the South-<br />
Transdanubian Region<br />
close to the Hungarian-<br />
Cro<strong>at</strong>ian border
Fe<strong>at</strong>ures <strong>of</strong> <strong>Szaporca</strong> Oxbow System<br />
•Originally it was the main bed <strong>of</strong> <strong>Drava</strong> <strong>River</strong><br />
•Due to meandering it became a full-developed and got loose from the <strong>River</strong><br />
1782<br />
•After the flood in 1975 a flood dyke was built and the connection broke <strong>of</strong>f the <strong>River</strong><br />
•Only a small sluice keeps touch with the <strong>Drava</strong> <strong>River</strong> during high w<strong>at</strong>er levels<br />
•Due to river bed deepening and changing in w<strong>at</strong>er flow: high w<strong>at</strong>er levels are infrequent<br />
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The <strong>Szaporca</strong> Oxbow System now<br />
<strong>Drava</strong> <strong>River</strong> Fekete-víz <strong>River</strong><br />
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A gre<strong>at</strong> amount <strong>of</strong> <strong>oxbow</strong>s and small undeveloped villages<br />
No industrial activities n<strong>at</strong>ure-close environment<br />
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<strong>Restor<strong>at</strong>ion</strong> <strong>of</strong> the <strong>Szaporca</strong> Oxbow <strong>system</strong> as an<br />
INTERREG project<br />
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N<br />
Fe<strong>at</strong>ures <strong>of</strong> the <strong>oxbow</strong>:<br />
•20 km2<br />
•36 ha<br />
•4 small <strong>oxbow</strong>-lakes<br />
• Ramsar area<br />
• NATURA 2000 site<br />
•n<strong>at</strong>ural conserv<strong>at</strong>ion area<br />
• Danube-<strong>Drava</strong> N<strong>at</strong>ional Park area
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Problems and aim<br />
Problems:<br />
• Loss <strong>of</strong> connection to the main river bed<br />
because <strong>of</strong> low w<strong>at</strong>er levels<br />
• Sediment<strong>at</strong>ion<br />
• Significant degrad<strong>at</strong>ion <strong>of</strong> a valuable<br />
habit<strong>at</strong> for fish and migr<strong>at</strong>ory birds<br />
Aim: to restore the <strong>oxbow</strong> by w<strong>at</strong>er<br />
supplement<br />
• sustainable w<strong>at</strong>er management<br />
• to enhance the habit<strong>at</strong><br />
• n<strong>at</strong>ural conserv<strong>at</strong>ion<br />
• reconsider<strong>at</strong>ion <strong>of</strong> land use<br />
• rural development (recre<strong>at</strong>ion, ecotourism<br />
etc.)
W<strong>at</strong>er supplement possibilities<br />
1.<br />
2.<br />
Version One:<br />
From Fekete-víz<br />
<strong>River</strong> by<br />
gravit<strong>at</strong>ion<br />
Version Two:<br />
From <strong>Drava</strong> <strong>River</strong>,<br />
pumping st<strong>at</strong>ion<br />
is needed<br />
Advantages <strong>of</strong> the project: better w<strong>at</strong>er quality in the <strong>oxbow</strong> <strong>system</strong><br />
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Version One has been already investig<strong>at</strong>ed<br />
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W<strong>at</strong>er supplement from Fekete-víz<br />
<strong>River</strong> can be designed well<br />
A flow measuring structureprovides:<br />
•long term w<strong>at</strong>er discharge d<strong>at</strong>a from 1960<br />
•from 1998 digitalized d<strong>at</strong>a collecting<br />
Characteristics <strong>of</strong> Fekete-víz <strong>River</strong>:<br />
•c<strong>at</strong>chment area: 1185 km2<br />
•dry-we<strong>at</strong>her flow: 0,178 m3/s<br />
•mean w<strong>at</strong>er flow: 4,541m3/s<br />
•high w<strong>at</strong>er level flow: 62 m3/s
Technical details <strong>of</strong> the planned w<strong>at</strong>er<br />
supplement from Fekete-víz <strong>River</strong><br />
•W<strong>at</strong>er supplement by gravit<strong>at</strong>ion (advantage)<br />
•W<strong>at</strong>er intake structure<br />
•6 w<strong>at</strong>er management artifacts<br />
•6 km long ditch<br />
•650 m long road<br />
•Enhancing dykes on 1300 m long<br />
•Approx. 10 km long n<strong>at</strong>ural friendly river bed adjustment<br />
•Purchasing 12 ha <strong>of</strong> territory<br />
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Positive effects <strong>of</strong> restor<strong>at</strong>ion<br />
•Protecting ecological values: <strong>oxbow</strong> lakes as habit<strong>at</strong>s<br />
•Protecting or even enhancing biodiversity<br />
•Enhancing n<strong>at</strong>ural conserv<strong>at</strong>ion<br />
•Would effect positively the economy as well:<br />
•eco-tourism (fishing, cycling etc.)<br />
•popul<strong>at</strong>ion-retain accomplishment would increase<br />
•would help on this r<strong>at</strong>her undeveloped region <strong>of</strong> Hungary<br />
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Thank you for your <strong>at</strong>tention!<br />
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Further inform<strong>at</strong>ion:<br />
www.ddkovizig.hu
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