Difference between revisions of "Weir (Thomson Weir / V notch sharp crested weir)"
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##District office | ##District office | ||
##Nature conversation agency | ##Nature conversation agency | ||
| − | #Accumulation and Drainage of the water: Before you can start the construction of the weir, you have to accumulate the water in front of the construction site and then you have draine the water around or over the weir. If you have electricity you can use pumps (dirt water pumps). Use at least two pumps. One big pump for most of the water and the other for the adjustment, so that the pumps never run dry. In the case you don't have electricity, you can build a small temporary dam and then use a pipe to drain the river water over the weir. I would suggest that you use a 12 V pump to get the water away which is leaking through the dam. | + | #Accumulation and Drainage of the water: |
| + | [[Image:WeirAccumulationDrainage.jpg|left|200px|Accumulation and Drainage of the water]] | ||
| + | Before you can start the construction of the weir, you have to accumulate the water in front of the construction site and then you have draine the water around or over the weir. If you have electricity you can use pumps (dirt water pumps). Use at least two pumps. One big pump for most of the water and the other for the adjustment, so that the pumps never run dry. In the case you don't have electricity, you can build a small temporary dam and then use a pipe to drain the river water over the weir. I would suggest that you use a 12 V pump to get the water away which is leaking through the dam. | ||
[[Image:WeirAccumulationDrainage.jpg|left|200px|Accumulation and Drainage of the water]] | [[Image:WeirAccumulationDrainage.jpg|left|200px|Accumulation and Drainage of the water]] | ||
[[Image:WeirAccumulationDrainage1.jpg|right|200px|Accumulation and Drainage of the water]] | [[Image:WeirAccumulationDrainage1.jpg|right|200px|Accumulation and Drainage of the water]] | ||
Revision as of 22:38, 7 August 2007
Parameter to be measured:
Discharge of open channels
Method:
Equipment:
Construction:
- Planning: Before you can build a weir, you need permissions from different institutions . In my case (Bavaria, Germany) I needed permissions of following people:
- Owner
- Fishing rights
- District office
- Nature conversation agency
- Accumulation and Drainage of the water:
Before you can start the construction of the weir, you have to accumulate the water in front of the construction site and then you have draine the water around or over the weir. If you have electricity you can use pumps (dirt water pumps). Use at least two pumps. One big pump for most of the water and the other for the adjustment, so that the pumps never run dry. In the case you don't have electricity, you can build a small temporary dam and then use a pipe to drain the river water over the weir. I would suggest that you use a 12 V pump to get the water away which is leaking through the dam.
Advantages:
Disadvantages:
What to watch out for:
Problems/Questions:
Links
Projects that used the above equipment:
Other related web sites: