Altshauser Weiher

Altshauser Weiher
	Belt of reeds and bushes
Geographical location	Germany ; Baden-Wuerttemberg ; district Ravensburg
Drain	via Hühler Oh in die Schussen
Places on the shore	Altshausen
Location close to the shore	Aulendorf
	Data
Coordinates	47 ° 56 '11 " N , 9 ° 31' 46" E Coordinates: 47 ° 56 '11 " N , 9 ° 31' 46" E
Altitude above sea level	582 m above sea level NHN
surface	10.3 ha
volume	189,000 m³
Maximum depth	3.5 m
Middle deep	1.8 m
Catchment area	12.48 km²
particularities	Nature reserve since 1974, ; bird sanctuary , ; FFH area ; Action program for the rehabilitation of Upper Swabian lakes

The Altshauser Weiher is a still water in the area of the Baden-Württemberg community Altshausen in the district of Ravensburg in Germany .

location

The 10.3 hectare (ha) large Altshauser Weiher naturally belongs to the Upper Swabian hill country . It is located west of Altshausen, directly on the federal highway 32 , at an altitude of 582 m above sea level. NHN .

description

The pond was created in 1276 by knights of the Teutonic Order as a fishing water. In the course of time it was given different names: Alter Weiher, Altshäuser See, Altweiher, Altshauser Altweiher and Großer Weiher.

Hydrology

The catchment area of the Altshauser Weiher is around 1248 ha; 19 percent of this is used for forestry and 74 percent for agriculture.
The pond is mainly fed by the Ragenreuter Bach , the drainage takes place over the Hühler Ach in the Schussen .

With an area of 10.3 hectares and an average depth of 1.8 m (max. Depth = 3.5 m; in 1829 it was still 8.6 m, in 1960 it was subsided), the volume of the lake is around 189,000 cubic meters.

ecology

With the help of the action program for the rehabilitation of Upper Swabian lakes , the planning of various extensification measures in the areas of wastewater (construction of a sewage treatment plant ), agriculture and renaturation has been implemented in recent years .

Annual average of plant nutrients and other trophy indicators
year	1986	1987	1988	1990	1996	1999	2000	2004	2005
Total PO ₄ - phosphorus (µg / l)	126	263	107	210	63	69	65	85	64
Chlorophyll a (µg / l)	73	110	94	89	37	31	38	56	42
Chlorophyll a peak (µg / l)	144	249	185	181	68	55	117	100	77
total inorganic nitrogen (mg / l)	4.77	3.86	3.06	2.34	2.08	3.21	3.05	2.50	3.93
Viewing depth (m)	0.7	0.7	0.7		1.0	1.1	1.0	0.9	1.5

Nutrient concentrations in the inlet of the Altshauser Weiher
year	1987	1988	1990	1996	2004	2005
o-PO ₄ -phosphorus (µg / l)					40	27
Total PO ₄ phosphorus (µg / l)		88	65	84	79	66
Nitrate nitrogen (mg / l)	5.75	4.86		5.28	6.22	8.12
total inorganic nitrogen (mg / l)	5.83	5.06	10.7	5.32	6.29	8.16
Water flow (l / s)			92		18th	52

Protected area

The Altshauser Weiher is part of the 50 hectare nature reserve named after him and designated in 1974 , the bird sanctuary Blitzenreuter Seenplatte with Altshauser Weiher and is subject to the Habitats Directive .

Others

The Altshauser natural lido is located on the south-eastern bank of the pond.