206
M. R. Zoolfakar and I. I. Chacha
Therefore, propeller number 3 with a length of 64 mm and a width of 40 mm was
found to be effective.
18.4.3.1 Result Analysis Summary
1. Deeper the draft resulted into decrease in time taken to travel at a constant distance
due to high water resistance.
2. Larger propeller blades resulted into an increase in the harvesting rate and reduced
the time taken in harvesting.
3. Larger sprocket diameter resulted in increased speed and harvesting rate.
Therefore, the prototype should be constructed with larger propellers, larger
sprockets and maximum draft depth should be taken into consideration when
designing it.
18.5 Conclusion
Water hyacinth has more negative impacts compared to the positive impacts to the
society. Therefore, the society can benefit a lot when water hyacinth is controlled.
References
1. The Editors of Encyclopaedia Britannica (2020) lake Victoria. Available at: https://www.bri
tannica.com/place/Lake-Victoria. Accessed 14 July 2020
2. Awange, J.L., Ong’ang’a, O.: Lake Victoria Ecology, Resources, Environment, Springer (2006)
3. Osei-Agyamang, M.: Water Hyacinth (Eichhorinia crassipies). Available at: http://www.col
umbia.edu/itc/cerc/danoff-burg/invasion_bio/inv_spp_summ/water%252520hyacinth.html
(2002). Accessed: 14 July 2020
4. Queensland.: Water Hyacinth. Available at https://www.business.qld.gov.au/industries/farmsfishing-forestry/agriculture/land-management/health-pests-weeds-diseases/weeds-diseases/
invasive-plants/restricted/water-hyacinth (2017). Accessed 14 July 2020
5. GreenPort.: Mitigating water hyacinth in East Africa. Available at: https://www.greenport.com/
news101/africa/mitigating-water-hyacinth-in-east-africa (2019). Accessed 12 July 2020
6. Mironga, J.M.: Lessons for effective management of water hyacinth (Eichhornia Crassipes
(Mart.) Solms) in Kenya. IJHSS 4, 9(1), 120 (2014)
7. Tewabe, D., Asmare, E., Zelalem, W., Mohamed, B.: Identification of impacts, some biology
of water hyacinth (Eichhornia crassipes) and its management options in Lake Tana, Ethiopia.
NJAS 5(1), 8–15 (2017)
8. Nasution, M.I.T., Awal, S.M.S., Permana, D.M.: The methods of preventing water hyacinth as
aquatic pollution in Lake Toba caused by agricultural waste. Int. J. Environ. Sci. Dev. 7, 630
(2016)
9. U.S. Fish & Wildlife Service.: Water Hyacinth (Eichhornia crassipes) Ecological Risk
Screening Summary. Available at https://www.fws.gov/fisheries/ans/erss/highrisk/ERSS-Eic
hhornia-crassipes-FINAL.pdf (2018). Accessed 14 July 2020
M. R. Zoolfakar and I. I. Chacha
Therefore, propeller number 3 with a length of 64 mm and a width of 40 mm was
found to be effective.
18.4.3.1 Result Analysis Summary
1. Deeper the draft resulted into decrease in time taken to travel at a constant distance
due to high water resistance.
2. Larger propeller blades resulted into an increase in the harvesting rate and reduced
the time taken in harvesting.
3. Larger sprocket diameter resulted in increased speed and harvesting rate.
Therefore, the prototype should be constructed with larger propellers, larger
sprockets and maximum draft depth should be taken into consideration when
designing it.
18.5 Conclusion
Water hyacinth has more negative impacts compared to the positive impacts to the
society. Therefore, the society can benefit a lot when water hyacinth is controlled.
References
1. The Editors of Encyclopaedia Britannica (2020) lake Victoria. Available at: https://www.bri
tannica.com/place/Lake-Victoria. Accessed 14 July 2020
2. Awange, J.L., Ong’ang’a, O.: Lake Victoria Ecology, Resources, Environment, Springer (2006)
3. Osei-Agyamang, M.: Water Hyacinth (Eichhorinia crassipies). Available at: http://www.col
umbia.edu/itc/cerc/danoff-burg/invasion_bio/inv_spp_summ/water%252520hyacinth.html
(2002). Accessed: 14 July 2020
4. Queensland.: Water Hyacinth. Available at https://www.business.qld.gov.au/industries/farmsfishing-forestry/agriculture/land-management/health-pests-weeds-diseases/weeds-diseases/
invasive-plants/restricted/water-hyacinth (2017). Accessed 14 July 2020
5. GreenPort.: Mitigating water hyacinth in East Africa. Available at: https://www.greenport.com/
news101/africa/mitigating-water-hyacinth-in-east-africa (2019). Accessed 12 July 2020
6. Mironga, J.M.: Lessons for effective management of water hyacinth (Eichhornia Crassipes
(Mart.) Solms) in Kenya. IJHSS 4, 9(1), 120 (2014)
7. Tewabe, D., Asmare, E., Zelalem, W., Mohamed, B.: Identification of impacts, some biology
of water hyacinth (Eichhornia crassipes) and its management options in Lake Tana, Ethiopia.
NJAS 5(1), 8–15 (2017)
8. Nasution, M.I.T., Awal, S.M.S., Permana, D.M.: The methods of preventing water hyacinth as
aquatic pollution in Lake Toba caused by agricultural waste. Int. J. Environ. Sci. Dev. 7, 630
(2016)
9. U.S. Fish & Wildlife Service.: Water Hyacinth (Eichhornia crassipes) Ecological Risk
Screening Summary. Available at https://www.fws.gov/fisheries/ans/erss/highrisk/ERSS-Eic
hhornia-crassipes-FINAL.pdf (2018). Accessed 14 July 2020