DE29507613U1 - Fish passport for waters with level differences - Google Patents

Description

Bains Hoch- u. Tiefbau GmbH · PO Box 1265 · 21302 Lüneburg

S1339 LUNEBURG

industrial area
Goseburgstrasse 43

founded 1 3&Xgr;4

Tel: O 41 31/ 3 4a Fax: O 41 31/ 3 33

Rail connection

Bruns

Civil and hydraulic engineering

21339 Lueneburg BL-840/95

Fish pass for waters with level differences

The invention relates to a fish pass for waters with differences in level, consisting of a substantially U-shaped channel in which slats are installed to reduce the flow velocity.

In order to enable migrating fish to overcome differences in water levels, so-called fish passes are installed, through which fish can ascend to higher levels. The fish pass consists of a U-shaped channel that is installed at different angles of inclination. Usually in a ratio of 1:7, i.e. a height difference of 7 m in length. In some places, however, steeper inclinations of around 1:4 occur. In any case, it is important to keep the speed in the channel low enough that even smaller and weaker fish can overcome the incline.

The DE-GM document 87 04 813 has already made known such a fish pass, which can be prefabricated in series and is easy to install on the relevant obstacles, such as weirs or the like. Good results could be achieved with this known fish pass, but it was shown that an even greater reduction in the flow speed should be aimed for, in particular in order to be able to cope with steeper inclines and to enable smaller fish to ascend.

The invention is therefore based on the task of improving the previous design of a fish pass so that a significant reduction in the flow velocity can be achieved even with a steeper incline

Zxar The features stated in the main claim serve to solve this problem. The subclaims contain useful further developments.

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Bank details: Sparkasse Lüneburg BLZ &Xgr;4&Ogr; 501 1O Account SOO DD4 A7 Vereins- und Westbank AG Lüneburg

Bank code &Xgr;4&Ogr; 3OD OO Account 5S/ 9BO &Ogr;&Ogr;&Xgr; STRUCTURAL AND CIVIL ENGINEERING

Place of performance and jurisdiction is Lün*ebiSr&'.'...', J ."'.,. Schlüsselfejxiges Bauen
Commercial Register Lüneburg HRB 3SB .* **J &idigr;&idiagr;&iacgr;&iacgr; II New buildings, «Renovations

Managing Director Dipl.-ing.Wilhelm Brunl"*' ** ··· ·· · ·· Canal construction,«Paving work

SPECIAL CIVIL AND HYDRAULIC ENGINEERING

laser-guided pipe jacking natural hydraulic engineering

Bruns Hoch- u. Tiefbau GmbH · PO Box 1265 · 21302 Lüneburg

&Xgr;1339 LÜNEBURG

industrial area
Goseburgstrasse 43

founded 1 9&Xgr;4

Tel.: D 41 31/ 3 4O Fax: O 41 31/ 3 33

Rail connection

The fish pass according to the invention can be mass-produced, which reduces its price. It can be used universally and can be made of wood, reinforced concrete, plastic, etc. It is characterized by small dimensions and high effectiveness. Hydraulic tests have shown that the inventive design of the slats built into the channel enables a significantly greater reduction in the flow speed than previously. The use of the fish pass according to the invention is therefore also possible with inclines of up to 1:3, for example, and a valuable contribution is made to species and nature conservation.

The drawings show examples of the fish pass according to the invention.

Figure 1 shows the fish pass in a first embodiment in side view;

Figure 2 shows the top view of a slat as used in Figure 1,

Figure 3 shows the fish pass in a second embodiment in side view;

Figure 4 shows the top view of a third slat embodiment;

Figure 5 is a side view of the slats of Figure 4;

Figure 6 is a plan view of a slat as used in Figure 4;

Figure 7 shows the design of the channel with an additional climbing aid for invertebrates;

Figure 8 shows a variant of the additional climbing aid according to Figure 7.

Figure 1 shows the fish pass according to the invention in a first embodiment in side view in the installation position for a gradient of 1:6. The channel 2 can be seen with a side wall V and the bottom 2". A series of slats 1 are installed in the channel 2, each of which consists of two legs 5 and a web 6. The two legs S are connected to the web 6 at a bend 4, the web 6 and the legs S forming an open, obtuse angle with respect to the flow direction 3.

Figure 2 shows the top view of a slat 1 as used in the embodiment according to Figure 1. The two legs 5 are attached to the web 6 , forming a bend 4 with the surface of the web 6. The web 6 has a V-shaped cutout

Figure 3 shows a side view of a variant, namely the slats 1 are inserted into the channel 2 in such a way that they are roof-shaped with respect to the flow direction 3.

Bank details: Sparkasse Lüneburg Rl &Uacgr; 24&Ogr; 5D1 1 O Account 5OO OO4 47

Bank code ^el 24O ^U 3OO DD Account OS/slc^cras STRUCTURAL AND CIVIL ENGINEERING

Place of performance and jurisdiction is Lüneburg '. *.. I * .' l.. SchlOSfse'feriiiges Bauen

Commercial Register Lüneburg HRB 3BB "I :: : &iacgr; : * New buildings, renovations

Managing Director Dipl.-Ing.Wilhelm Bruns"* " *** ** * " Kan3feeu,.Paving work

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founded 1 SS4

Bruns Hoch- u. Tiefbau GmbH · PO Box 1265 · 21302 Lüneburg

&Xgr;1333 LÜNEBURG

industrial area
Goseburgstrasse 4-3

Phone:
Pax;

O 41 31/ 3 4O O 41 31/3 33

Figure 4 shows a further design of the slats 1 in a top view. The two side walls 2' of the channel 2 with the slats 1 attached to them can be seen, which form an open "IP" in relation to the direction of flow 3 in a top view from above. The slats 1 are V-shaped, as can best be seen from the top view in Figure 6. The two legs 9% 10' are connected diagonally to the side wall V , they form the open "U" with the diagonal web 6, whereby the web 6 is inclined in the direction of the draining water and has a V-shaped cutout. The slats 1 consist of two parts 9', 9" and 10% 10", which are connected to one another at the bend 4 in such a way that the leg parts 9" and 10% 10" are connected approximately along a vertical line to the side wall V of the channel 2.

Figure S shows the arrangement of the slats 1 according to Figure 4 in side view. In this case, the front side wall V of the channel 2 must be removed so that the rear side wall 2* and the bottom 2" can be seen. One leg 9 can be seen with its parts 9' and 9", which are attached to the side wall 2' and connected to each other via the bend. On the inside, the leg 9' is connected to the web 6, which is installed at an angle to the rear (in the direction of flow) in the channel 2.

Figure 6 shows the top view of a slat 1 as used in the embodiment according to Figure 4. The figuration of the slat is essentially V-shaped. The web 6 is connected to the parts 9' and 10* of the legs, which in turn are connected via the fold line 4 to the upper parts 9" and 10" of the two legs.

Figure 7 shows the fish pass with an additional climbing aid for invertebrates, the slats 1 can be built into the channel 2 according to one of the embodiments described. A substrate 7 is attached to the bottom of the channel 2, which enables invertebrates in particular to overcome height differences and consists of a clamped gravel lining and /or a lining with willow brushwood

Figure 8 shows a variant of the embodiment according to Figure 7 in which a climbing aid for invertebrates in particular is attached to the side of the channel 2. This climbing aid could also be provided on both sides of the channel 2. The lateral climbing aid is also provided with substrate 7 on its bottom and can be connected to the channel via stiffening struts 8.

Bank details: Sparkasse Lüneburg BLZ SAO 5D1 1 O Account 5OO OO4 AV Vereins- und Westbank AG Lüneburg

Bank code SAO 3OO OO Account 5&Xgr;/ S9O OO2 STRUCTURAL AND CIVIL ENGINEERING

Place of performance and jurisdiction is Lüneburg I i., ! ! .* *,., Schlässeieiitiges Bauen
Commercial Register Lüneburg HRB 3BB .* "I * &iacgr;&iacgr;&idigr; * J New buildings*,« Renovations

Managing Director,Dipl.-Ing,Wilhelm Bruns*** ** **· ·· * ·· Kanaibeuj·Paving work

SPECIAL CIVIL ENGINEERING AND HYDRAULIC ENGINEERING

laser-guided pipe jacking natural hydraulic engineering

Claims (10)

1. Fish pass for waters with differences in level, consisting of a substantially U-shaped channel into which slats are installed to reduce the flow velocity marked throughout, that the slats (1) are bent in their vertical extension through the channel (2) relative to the flow direction (3) (bend 4). 2. Fish pass according to claim 1, characterized in that two legs (5) and a web (6) of the slats (1), which are connected to one another at the bend (4), form an open, obtuse angle with respect to the flow direction (3) (Figure 1) 3. Fish pass according to claim 1, characterized in that the slats (1) with legs (5) and a web (6), which are connected to one another at the bend (4), are roof-shaped relative to the flow direction (3) (Figure 3). 4. Fish pass according to one of claims 1-3, characterized in that the slats (1) are V-shaped in plan view (Figure 2). 5. Fish pass according to one of claims 1-3, characterized in that the slats (1) are U-shaped in plan view (Figure 8). 6. Fish pass according to one of claims 1-5, characterized in that the slats (1) are attached to the side walls of the channel (2), e.g. by means of angle brackets. 7. Fish pass according to claim 1, characterized in that the slats (1) form an open "U" in relation to the flow direction (3) in a top view, the slats (1) being V-shaped and consisting of a web (6) with legs (9\ 9" and 10% 10") on both sides, which are connected to one another at the bend (4) (Figures 4, 5, 6). 8. Fish pass according to one of claims 1-7, characterized in that a substrate (7) is attached to the bottom (2") of the channel (2) in order to enable invertebrates to overcome height differences (Figure 7). Bank details: Sparkasse Lüneburg BLZ 24O 5Q1 1 D Account SDO OO4 &Lgr;&Uacgr; Vereins- und Westbank AG Lüneburg Bank code S4D 3DO OQ Account 5&Xgr;/ 99D ODE CONSTRUCTION AND CIVIL ENGINEERING Place of performance and jurisdiction is Lüneburg, Germany .« &iacgr;&iacgr; .* *.. SchlisaseTfe*ri;iges Bauen Commercial Register Lüneburg HBS 3SB .* "IIIIIII New buildings*«Renovations Managing Director Dipl.-/ng.Wilhelm Brunä'" ** *** ·* · *· Kanaibau,«IPlastarbeiten -2- SPECIAL CIVIL AND WATER ENGINEERING laser-guided pipe driving Natural hydraulic engineering Bruns Hoch- u. Tiefbau GmbH · PO Box 1265 »21302 Lüneburg S1335 LÜNEBURG Industrial area Goseburgstrasse 43 'founded 1 924 Tel.: O 41 31/3 4O3G Fax: O 41 31/ 3 33 Rail connection 9. Fish pass according to claim 8, characterized in that the substrate (7) consists of a clamped gravel lining and/or a lining with willow brushwood 10. Fish pass according to claim 8, characterized in that a climbing aid (11) for invertebrates is attached to the side of the channel (2) or also to both sides of the channel (2), which is lined at its bottom with the substrate (7) (Figure 8). Bank details: Sparkasse Lüneburg BLZ &Xgr;4&Ogr; SO1 1 D Account 5QO OD4 47 Vereins- und Westbank AG Lüneburg Bank code 24&Ogr; 3OO OO Account 52/ S9O OO2 STRUCTURAL AND CIVIL ENGINEERING Place of performance and jurisdiction is Lünebjirfc * I.« JJ.* *.. Key-free construction Commercial Register Lüneburg HRB 3BB .* *** ill* i J New buildings,»Renovations Managing Director Dipl.-Ing.Wilhelm Bruns*** ** *** ** * *· Kanalfceu,·(f»rlaeterarbeiten SPECIAL CIVIL AND HYDRAULIC ENGINEERING laser-guided tunnelling Natural hydraulic engineering