Hungarian-Slovak Environmental Monitoring on the Danube Mosonmagyar

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Hungarian-Slovak Environmental Monitoringon the
DanubeMosonmagyaróvár, 2006. May
Characterisation of hydro-chemical status and
trends in water-quality changes

• North-Transdanubian Regional, Environmental
• Nature Protection and Water Authority
• Dr. Lajos Horváth
• Rezso Mayer
• Judit Pulai

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The monitoring network integrates the sampling
points of the national surface water quality base
network with the 11 sampling points established
as a result of the joint Slovak-Hungarian
monitoring for the floodplain and the Moson
Danube water supplementation associated with the
underwater weir established in the main Danube
branch.
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INUNDATION AREA 2005
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2005
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The Old Main Danube Arm
The water quality of the abandoned main Danube
arm has become unstable during the time period
subsequent to the diversion which could be
witnessed particularly in the unfavorable oxygen
saturation levels until the begin of the
operation of the underwater weir. Monitoring of
the river section began after the underwater weir
began operating.
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Moson-DanubeTraveling towards the outlet a
significant degradation of conditions is
experienced as a result of human activities.
While the upper section ranges from good to
tolerable, the middle section is tolerable and
the lower section where the effluent from the
wastewater treatment plant of Gyor ranges from
tolerable to significantly polluted.
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Lipót Lake
The water quality readings for the Lipót lake
show that the quality of the surface water from
the supplement aimed at maintaining the dead arm
was a determining factor in the water quality of
the protected habitats as the natural conditions
were supplanted. The conductivity declined and
fluctuated over a narrow interval while
nitrification and phosphor sources increased. In
addition to the shading effect of the
macro-vegetation, plankton eutrification occurred
and conditions were inadequate for a number of
species previously found here.
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Thanks for your attention