Preliminary Survey of Water Hyacinth in Lake

Tewabe, Dereje

doi:10.17352/2455-8141.000003

Cited by 37 publications

(35 citation statements)

References 5 publications

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“…Stroud [5] reported that the plant was observed in marshy tracts of the Abay River near its outlet with Lake Tana in early 1990s. The preliminary survey done by [6], however reported that the weed was observed in Megech river mouth for the first in 2010. Officially, water hyacinth was recognized as ecologically dangerous invasive weed in 2011 [4].…”

Section: Introductionmentioning

confidence: 99%

Socioeconomic effects of water hyacinth (Echhornia Crassipes) in Lake Tana, North Western Ethiopia

2020

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Water hyacinth has been progressively advanced in Lake Tana since 2011 and covered vast areas of the lakeshore. The aim of this study was to assess how the lakeshore covered by the weed mats affected the socioeconomic of the local community. The study was based on a survey of 405 households, 8 group discussions and interviews of 15 key informants conducted from January to March 2018. The results revealed that crop production, livestock feed supply, water supply, fishing, the health of local people and livestock were impacted negatively by the infestation of water hyacinth. The range of socioeconomic problems caused by the weed generally implied the real impacts on the lives of local communities and national economic development. The efforts made to control water hyacinth has costed huge labor and financial resources. The results revealed that close to 800,000 human labor dedicated to manual removal of the weed from 2012 to 2018 and above one million USD spent for procurement of harvester machines and bioagent experiments. In spite of the devotion of huge labor and spending of a lot of money, the expansion of the weed has not controlled. Poor coordination of controlling efforts, dumping of harvested dense mats of the weed in the lakeshore, lack of genuine participation of the local people are principal factors for the failure of the controlling efforts A coordination of various stakeholders thus is needed to make eradicating methods more effective. Other alternative options should also be considered to control the weed expansion.

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Section: Introductionmentioning

confidence: 99%

Socioeconomic effects of water hyacinth (Echhornia Crassipes) in Lake Tana, North Western Ethiopia

2020

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“…Sediment concentration in rivers over the last 30 years became double indicating more efficient sediment trapping in the floodplain as a result of higher lake levels, rising river beds, and farmers intervening with the course of the river near the shore (Abate et al., 2017). Conservation problem in the Lake Tana Biosphere Reserve world heritage site has increased the infestation since it was known to appear in 2011 not more than 80–100hectare (Tewabe, 2015) has reached to over 20,000 hectares (Tewabe et al., 2017) and to 50,000hectare (Worku and Sahile, 2017).…”

Section: Introductionmentioning

confidence: 99%

Determinants of environmental conservation in Lake Tana Biosphere Reserve, Ethiopia

Bires

Raj

2019

Heliyon

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This study has investigated the factors that determine the conservation of one of the major ecosystem in Ethiopia, Lake Tana Biosphere Reserve, using primarily quantitative followed by qualitative approach to provide adequate results of the problem under study. The study has employed the descriptive design and a total of 305 samples from rural households (n = 159) and tourism-related enterprises (n = 146) were selected based on a stratified random sampling technique. Samples were drawn based on their direct attachment either in their livelihood and possess a responsibility to the study area. Data were collected through questionnaires, observation, focus group discussion, unstructured interview and secondary data was consulted. Exploratory factor analysis was used to extract dimensions for environmental awareness. Binary logistic regression was used to analyze data using SPSS version 23. Ten Socio-demographic variables of samples were used as an independent variable and environmental conservation dimensions as dependent variables. The result revealed that out of the 10 variables employed in the analysis, six variables were found significant. Hence, marital status, household size, income source, household income, membership to club and resident location were found to be significant. Qualitative analysis revealed wrong reports for political consumption driven little government attention and lack of integrated natural resource management policy and plan were major factors hindering conservation. A vivid and holistic destination management policy making with enough room to stakeholders' involvement shall be a prior task for the government for better conservation of the ecosystem and sustainable development.

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“…Recently, the appalling incident of the weed is observed on the largest Lake of the country (Lake Tana) and its surrounding wetlands (Agidie et al, 2018). Its existence over the Lake's wetlands was first observed in 2011 at the mouth of River Megech; covering some 80 -100 ha lands along the northern rims of the Lake (Tewabe, 2015;Asmare, 2017). The invasion has then severely expanded into the north-eastern catchments of the Lake and covered almost 15% of the northern parts of the Lake's coastal lands (Asmare, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The invasion has then severely expanded into the north-eastern catchments of the Lake and covered almost 15% of the northern parts of the Lake's coastal lands (Asmare, 2017). According to Tewabe (2015), the area coverage of the water hyacinth in 2011 was ≈80 -100 ha. A year later, it has increased to somewhat 20,000 ha and rose to 50,000 ha in 2014 (Anteneh, Tewabe, Addisalem, Abebaw, Bifta & Yitayew, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…With due consideration of the problems inflicted by the water hyacinth, several research studies cited elsewhere above (e.g. Anteneh et al, 2015;Tewabe, 2015;Asmare et al, 2016;Asmare, 2017;Tewabe et al, 2017;Agidie et al, 2018) were conducted at different times. Most of these studies focused on the weed expansion and on its potential impacts.…”

Section: Introductionmentioning

confidence: 99%

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Determinants of manual control of water hyacinth expansion over the Lake Tana, Ethiopia

Yitbarek¹,

Belay²,

Bazezew³

2019

AFRREV STECH: Int J. Sci and Technol

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Water hyacinth is an exotic freshwater weed damaging wetland resources over the Lake Tana basin, Ethiopia. Different measures, including manual labour and harvesting machinery are in use to reduce its damage and expansion. Yet, the invasion of the weed appears expanding its scope across the wetlands of the Lake. This paper presented the study made to identify determinant factors affecting manual control of water hyacinth expansion over the Lake wetlands. It tried to analyse the expansion trend of the water hyacinth and community efforts to control its extension. Data were gathered from questionnaire surveys, group discussions, interviews and field observations. Descriptive statistics and binary logistic regression were used for data analysis. The study revealed that the water hyacinth cover in the Lake's wetland increased from ≤10, 000 ha in 2011 to over 50, 000 ha in 2017. Wetland terrain, water depth, food availability, farming time, employment and government support were found significantly influencing the manual control practices of households. Hence, government support must increase to motivate people involvement in manual weed removal campaigns. Micro-relief maps and floating boats need be readily available to help participants easily identify risky terrains and expand the physical weed removal into the deeper waters.

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Preliminary Survey of Water Hyacinth in Lake

Cited by 37 publications

References 5 publications

Socioeconomic effects of water hyacinth (Echhornia Crassipes) in Lake Tana, North Western Ethiopia

Socioeconomic effects of water hyacinth (Echhornia Crassipes) in Lake Tana, North Western Ethiopia

Determinants of environmental conservation in Lake Tana Biosphere Reserve, Ethiopia

Determinants of manual control of water hyacinth expansion over the Lake Tana, Ethiopia

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