Lake Volzer

Lake Volzer
Geographical location	Illmensee , Sigmaringen district , Baden-Württemberg , Germany
Tributaries	over ditches in the southwest and southeast, partly from Andelsbach from Ruschweiler See
Drain	Andelsbach → Ablach → Danube → Black Sea
	Data
Coordinates	47 ° 52 '0.1 " N , 9 ° 21' 37.8" E Coordinates: 47 ° 52 '0.1 " N , 9 ° 21' 37.8" E
Altitude above sea level	691.1 m above sea level NHN
surface	4.7 hectares
volume	58,000 m³
Maximum depth	1.6 m
Middle deep	1.2 m
Catchment area	91 ha
particularities	Stone Age bank settlements ; FFH , LSG , NSG ; Action program for the rehabilitation of Upper Swabian lakes

The Volzer See is a still water in the area of the Baden-Württemberg community Illmensee in the district of Sigmaringen in Germany .

geography

General

The approximately five hectares large Volzer lake is one of three separate areas by the silting glacial lakes in the municipality of Illmensee, together with the Illmensee and Rusch hamlet lake it forms a lake district. It is located around one kilometer northwest of the Illmenseer town center at an altitude of 691.1 m above sea level. NHN and is used today for fishing purposes.

Emergence

The Volzer See is a residual lake of a larger coherent tongue basin lake between the terminal moraines of the main and the first retreat stage of the last ice age, the so-called Würme Ice Age, around 18,000 years ago.

Hydrology

The catchment area of Lake Volzer extends to 91 hectares. The size of the water surface is 4.7 hectares , with an average depth of 1.2 meters and a maximum depth of 1.6 meters results in a volume of around 58,000 cubic meters.

The main inflow of the lake comes from trenches in the southwest and southeast and now and then from the Andelsbach from Ruschweiler See and Illmensee , the outflow via Andelsbach and Ablach to the Danube and thus into the Black Sea .

ecology

Since 1989 the Illmensee community has been involved in the action program for the rehabilitation of Upper Swabian lakes with the three lakes . An important goal of this program is to reduce nutrient inputs in streams, lakes and ponds and thereby improve and maintain the condition of the water bodies.

30 percent of the catchment area of Lake Volzer is used for forest and 63 percent for agriculture - 33% of which is grassland and 67% arable land.

Plant nutrients and other trophy indicators in Lake Volzer
year	1985	1987	1988	1994	2001	2009
Total PO ₄ - phosphorus (µg / l)	81	-	84	97	201	157
Chlorophyll a (µg / l)	22nd	32	47	-	66	84
Chlorophyll a peak (µg / l)	27	24	75	-	112	170
total inorganic nitrogen a (mg / l)	1.00	1.15	0.89	0.36	0.67	0.29
Viewing depth (m)	-	0.9	1.1	-	0.8	0.7

Protected areas

Together with the Rusch hamlet lake is the Volzer Lake since 1987, the 70-hectare nature reserve " Rusch hamlet and Volzer Lake " and, added to the Illmensee, the 263.1-hectare conservation area " Illmensee, Rusch hamlet lake and Volzer lake ". Since 2005 the three lakes have belonged to the FFH area “ Pfrunger Ried and Seen bei Illmensee ”.

Web links

Commons : Volzer See - Collection of images, videos and audio files

Action program for the rehabilitation of Upper Swabian lakes