Alfhausen-Rieste reserve basin

Alfhausen-Rieste reserve basin
NSG reserve basin Alfhausen-Rieste, taken from the observation station on the dike
Location: District of Osnabrück , Lower Saxony , Germany Tributaries: Pass-through from Alfsee Drain: Arrester to the rabbit Larger places nearby: Alfhausen , Rieste
Lower Saxony , Germany
Coordinates	52 ° 30 '3 "  N , 7 ° 59' 23"  E Coordinates: 52 ° 30 '3 "  N , 7 ° 59' 23"  E
Data on the structure
Lock type:	dam
Height of the structure crown:	43.75  m above sea level NN
Crown width:	4 m
Slope slope on the air side :	1: 3
Slope slope on the water side :	1: 4
Operator:	NLWKN
Data on the reservoir
Altitude (at congestion destination )	41.75  m above sea level NN
Storage space	8.1 million m³
Particularities:	Nature reserve

The reserve tank Alfhausen-Rieste is a detention basin designed dam for the catchment area of the rabbit and part of the "flood retention basin Alfhausen-Rieste", which also includes the Alfsee heard as a main basin. The “Alfhausen-Riese flood retention basin” is located in the Osnabrück district between Bramsche and Bersenbrück . The "Reserve Basin Alfhausen-Rieste" northeast of the main basin is under nature protection .

Reserve basin

The entire reserve basin including the dams covers an area of ​​152.5 hectares, the area within the dams, which is under nature protection, is 123  hectares in size. The bottom of the pool is around 35.00 to 37.00 m above sea level. NN , the height of the dams, whose crown width amounts to 4 m, is 43.75 m above sea level. NN. The usable storage space is at an altitude of 41.75 m above sea level. NN 8.1 million m³

Nature reserve

The "Alfhausen-Rieste flood retention basin" is a nature reserve in the Lower Saxony municipality of Alfhausen in the joint municipality of Bersenbrück in the district of Osnabrück.

The nature reserve with the sign NSG WE 210 is 123 hectares in size. Most of it is part of the EU bird sanctuary "Alfsee". The area has been a nature reserve since December 21, 1991. The responsible lower nature conservation authority is the district of Osnabrück.

The nature reserve is located between Alfhausen and Rieste northeast of the Alfsee . It is characterized by a lake roughly in the middle of the protected area, which is surrounded by wet grassland and swamp and alluvial forests with other still waters. The grassland is used extensively , especially for mowing , sometimes also as sheep pasture. The nature reserve serves as a feeding, resting and breeding area for a large number of birds .

To the west of the lake, the 1.15 km long pass-through runs between the compensation and the outlet structure through the nature reserve. About 30 m³ of water per second can be drained from the Alfsee via the duct.

The reserve basin is only flooded during particularly large floods, when the 12.7 million m³ storage space of the main basin is exhausted and the water cannot be drained off via the hare.

Web links

• Alfhausen-Rieste flood retention basin in the database of the Lower Saxony State Office for Water Management, Coastal and Nature Conservation (NLWKN)
• Alfhausen-Rieste flood retention basin in the database of the Lower Saxony State Office for Water Management, Coastal and Nature Conservation (NLWKN)