Flow Rate Measurement of Stream : Monikonopuro, Haaganpuro, and Longinoja
Baral, Asmit (2019)
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2019111421242
https://urn.fi/URN:NBN:fi:amk-2019111421242
Tiivistelmä
Monikonpuro, Haaganpuro, and Longinoja are three major streams in the Helsinki area for trout and salmon spawning. These flowing streams are a habitat for many aquatic and semi-aquatic organisms. The rich riparian vegetation around these streams is helping to balance the ecological status in the surrounding area.
The main objective of the thesis was to measure flow velocity and discharge at different point of the streams and to check if these measurement point would be feasible for trout and salmon spawning. Additionally, the effect of the renovation on the flowrate of the Monikonpuro also studied through quantitative analysis. Flowrates were calculated by using the velocity-area method. This thesis also presents different techniques that could be used to renovate these streams in a natural way.
The results show that there is fluctuation in the discharge and velocity of Monikonpuro at different selected measurement points. This is due to the change in the depth and width of the stream. Also, there was decreased velocity in M3 and M4 measurement points in Monikonpuro after restoration. Furthermore, Haaganpuro and Longinoja do not show much variation in velocity in the selected measurement points. Weather does not seem to have had any significant effect on the velocity of the streams since there was less precipitation during the measurement days. However, negative precipitation has decreased the depth of the streams in Haaganpuro stream.
The main objective of the thesis was to measure flow velocity and discharge at different point of the streams and to check if these measurement point would be feasible for trout and salmon spawning. Additionally, the effect of the renovation on the flowrate of the Monikonpuro also studied through quantitative analysis. Flowrates were calculated by using the velocity-area method. This thesis also presents different techniques that could be used to renovate these streams in a natural way.
The results show that there is fluctuation in the discharge and velocity of Monikonpuro at different selected measurement points. This is due to the change in the depth and width of the stream. Also, there was decreased velocity in M3 and M4 measurement points in Monikonpuro after restoration. Furthermore, Haaganpuro and Longinoja do not show much variation in velocity in the selected measurement points. Weather does not seem to have had any significant effect on the velocity of the streams since there was less precipitation during the measurement days. However, negative precipitation has decreased the depth of the streams in Haaganpuro stream.