OPAQUE -

Operationelle Abfluss- und Hochwasservorhersage in Quellgebieten   operational discharge and flooding predictions in head catchments

New Reservoir at Pöbelbach

Hydraulischer Modellversuch Hochwasserrückhaltebecken Niederpöbel

Im Rahmen der von der Landestalsperrenverwaltung des Freistaates Sachsen (LTV) landesweit erstellten Hochwasserschutzkonzepte soll eins bei Niederpöbel am Pöbelbach - einem Nebenfl uss der Roten Weißeritz - entstehen. more...

Planung ( Auszug aus Vortrag) Projektvorstellung bei Inros Lackner AG

Publikation in Hochwasserschutz und Katastrophenmanagement

Planung des Hochwasserrückhaltebeckens Niederpöbel mit Ökodurchlass und Straßendurchfahrt
Stopsack, Hermann; Goldenbogen, Roland; Flemming, Ralf;
Ernst und Sohn Special; 6/2007
aus: Hochwasserschutz und Katastrophenmanagement, November 2007
Ernst und Sohn 2007, Abb.,Tab.,Lit. S.18-24

OPAQUE Study Areas - Weißeritz

Location of the catchment

Rote Weißeritz and Wilde Weißeritz originate in the eatern Erzgebirge at the Czech-German border close to Altenberg. The two branches join at the city of Freital to form the United Weißeritz (Vereinigte Weißeritz)

The source of the Rote Weißeritz is in the reservoir system of the town Altenberg, which includes the reservoir Großer Galgenteich and reservoir Altenberg. Further downstream is the reservoir Malter close to the city Dippoldiswalde. The reservoir system is used for flooding control, drinking water supply, as well as service water supply. The Rote Weißeritz has a total length of about 35 km.

The Wilde Weißeritz originates in the Czech Republic. About 5 km² of the catchment are in Czechia. There are two reservoirs used for drinking water supply further downstream, the reservoir Lehnmühle and the reservoir Klingenberg. After 51 km the Wilde Weißeritz joins the Rote Weißeritz.

The Vereinigte Weißeritz passes Freital and Friedrichstadt, a part of Dresden where it joins the Elbe.

Table 1: catchment size, river length and height above sea level of the river Weißeritz (LFUG 2004).

catchment	catchment size [km²]	length [km]	maximal height above sea level [mNN]	minimal height above sea level [mNN]
Wilde Weißeritz	163	52,9	735	185
Rote Weißeritz	154	35,4	765	185
Vereinigte Weißeritz	67	14,2	185	110
total	384	102,5

Climate

The eastern Erz Mountains have a moderate climate. Three climatic zones (phänomenologische Naturräume) can be distinguished in the catchment of the river Weißeritz.

• Above 650 m a cool mountain climate is prevalent
• Below 650 m the lower Erz mountains have a moderate mountain climate
• The valley of the river Elbe around Dresden has a mild climate

The raise of the mountain range from north west to south east results in orographic rain. Therefore long lasting rainfall occurs during west and northwest wind weather and the erz mountains obtain the twice as much rain than the closeby plain. Also, the snow cover is considerable and often lasts until april. The dry falling wind coming from south is called Böhmian wind. The flood in august 2002 was caused by increased rainfall due to orographic effects on the southern slopes during a Vb-Grosswetterlage.

Table 2: Climatic zones.

climatic zone	mean annual temperature [°C]	annual rainfall [mm]
upper eastern Erz mountains	4,0…5,5	950…1050
lower eastern Erz mountains	6,1…7,7	730…1000
Elbe valley	9,1	600…640

Soil

The "Boden Übersichtskarte" (BÜK) by the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR) provides soil types for entire germany in a resolution of 1:1.000.000

Landuse