Flow Rate Measurement of Mätäjoki and Haaganpuro
Shrestha, Bishal (2019)
2019
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2019052010602
https://urn.fi/URN:NBN:fi:amk-2019052010602
Tiivistelmä
Mätäjoki and Haaganpuro are two major streams in Helsinki with the larger catchment area. Trout and other vertebrates in this ecosystem are using these streams as a spawning site and natural habitat. These streams are helping to keep the ecological balance in the surroundings.
The main aim of this thesis was to find out the average flow rate and the discharge of Mätäjoki and Haaganpuro at a different time of the year and check if the stream is suitable for the trout spawning or not.
In a literature review, velocity area method, moving boat method and factors affecting the flow and discharge were described in detail. Depths, width, and the flow rate measurement were performed onsite and the calculations are based on obtained results.
The result shows that the flow rate of Haaganpuro was more than Mätäjoki, but the discharge of Haaganpuro was less than Mätäjoki due to small depth and width. Weather played a major role in the rise and fall in flow rate. The flow rate and depths of Mätäjoki are more suitable than Haaganpuro for trout spawning.
The main aim of this thesis was to find out the average flow rate and the discharge of Mätäjoki and Haaganpuro at a different time of the year and check if the stream is suitable for the trout spawning or not.
In a literature review, velocity area method, moving boat method and factors affecting the flow and discharge were described in detail. Depths, width, and the flow rate measurement were performed onsite and the calculations are based on obtained results.
The result shows that the flow rate of Haaganpuro was more than Mätäjoki, but the discharge of Haaganpuro was less than Mätäjoki due to small depth and width. Weather played a major role in the rise and fall in flow rate. The flow rate and depths of Mätäjoki are more suitable than Haaganpuro for trout spawning.