http://repository.hoarec.org:80/home/handle/123456789/5 Mon, 25 May 2026 04:14:49 GMT 2026-05-25T04:14:49Z http://repository.hoarec.org:80/home/handle/123456789/166 Title: Lesson Learnt from the campaign to save Lake Natron from plans to build a soda ash factory Authors: Ken Mwathe, Joan Kabugu and Jane Gaithuma Abstract: About BirdLife International BirdLife International is a global partnership of non-governmental organisations striving to conserve birds, their habitats, and global biodiversity, working with people, towards sustainable use of natural resources. Currently, the partnership works in more than 116 countries through 117 national grassroot conservation NGO’s. In Africa, the BirdLife Africa Partnership is a growing network of 23 such organisations plus one Country Programme, covering 24 countries, with a combined total of more than 300 staff and 30,000 members. Partners are involved in research, conservation action, environmental education and sustainable development through a broad agenda focusing not only on birds but also on other fauna and flora and social issues such as poverty alleviation. Sun, 01 Jan 2012 00:00:00 GMT http://repository.hoarec.org:80/home/handle/123456789/166 2012-01-01T00:00:00Z http://repository.hoarec.org:80/home/handle/123456789/66 Title: ASSESSSMENT OF DOWNSTREAM POLLUTION PROFILE OF HAWASSA CITY MUNICIPAL WASTEWATER AND ITS INFLUENCE ON LAKE HAWASSA Authors: Tarekegn, Temesgen Abstract: Lake Hawassa is used for a variety of purposes like fishing, recreation, swimming, drinking water supply by the communities surrounding it and cultivation of vegetables. However, it is exposed to wastewater discharge from the city and polluting the aquatic ecosystem. The objective of this study was characterization of municipal wastewater of Hawassa city and its impact on the receiving lake water quality. Five sites were selected from Wastewater channel and on the lake. A total of 20 grab samples were collected on two week basis for physio-chemical analysis. Samples were examined using standard procedure over the duration of May 2013 to July 2013. The significant pollution parameters for these effluents include a COD mean concentration ranged from (13.28±2.00mg/l -75.48±3.48), BOD5 concentration of (6.03±1.74 mg/l -26.97±3.56mg/l). Chloride and total hardness concentrations with mean values ranged from (12.44±4.14-18.58±14.88) and (292.75±438.21mg/l- 49.50±14.46) respectively. Ammonia and total nitrogen concentrations were with mean values of ranged (0.52±0.25mg/l -4.39±0.99 mg/l) and (10.00±1.63-32.75±2.75mg/l) respectively. The mean phosphorus, nitrate and nitrite content of the effluent were also found to be 0.34±0.06mg/l -4.20±0.14, 0.41±0.25mg/l 3.77±0.34 and 0.11±0.15mg/l- 0.27±0.17 mg/l respectively. The concentration of nitrite was negligible when the value compared with other parameters investigated. The pH values were 7.36±0.52-8.31±0.28 indicating alkalinity of the wastewater. Total Dissolved solids, electrical conductivity and Total Suspended Solids of the effluent wastewaters were (513.00±45.77-755.25±162.70) mg/l, (865.00±66.73-1287.75±297.23) (μS/cm) and (21.75±23.89 - 276.75±109.76) mg/l, respectively. The investigation of temperature and turbidity ranged from 21.50±2.69 - 23.00 +2.7 OC. and 23.28±21.10NTU -226.00±35.56 NTU respectively. The values of most parameters were significantly different among sites, at 0.05 significant level of post Hoc ANOVA. Sun, 01 Mar 2015 00:00:00 GMT http://repository.hoarec.org:80/home/handle/123456789/66 2015-03-01T00:00:00Z http://repository.hoarec.org:80/home/handle/123456789/65 Title: Potential of Water Hyacinth (Eichhornia crassipes (Mart.) Solms) for the Removal of Chromium from Wastewater in Artificial Pond System Authors: Woldemichael, Daniel Sun, 01 Mar 2009 00:00:00 GMT http://repository.hoarec.org:80/home/handle/123456789/65 2009-03-01T00:00:00Z http://repository.hoarec.org:80/home/handle/123456789/64 Title: Application of Remote-sensing and GIS for Potential Ecotourism Site Selection in Addis Ababa and its Surroundings Authors: Chernet, Daniel Abstract: ABSTRACT Addis Ababa is the main get way into and out of the country; hence it receives many tourists. Besides this, the contribution of the tourism industry as a source of revenue in general and the contribution of ecotourism both as a source of revenue and as a means of environmental sustainability in particular is low. Therefore, there is a strong need to studying ecotourism, as part of an alternative form of tourism, for the growth of low impact tourism in the area and for its natural ecosystem maintenance as well as for the benefit of local population. Ecotourism can have many components that can broadly be categorized in to three: Natural, Cultural and Educative components. The aim of this paper is thus to identify potentially suitable sites for ecotourism in the surroundings of Addis Ababa City mainly based on the Natural components of ecotourism. Seven factors, namely: Land use-land cover, Soil, Elevation, Slope, Vegetation density, Temperature and Rainfall were considered to determine the suitability of an area for ecotourism. More emphasis was given to the classification and accuracy assessment of land use-land cover. The result, thus, showed that 84.96% overall accuracy and 0.82 overall kappa statistics which indicates better classification. Using Multi criteria evaluation, sites suitable for ecotourism were identified. The result showed that highly suitable area accounts for 11 percent, moderately suitable area for 29 percent. Less suitable and very less suitable area, on the other hand, accounts for 33 and 27 percent, respectively. Large parts of the highly suitable areas lie in the Northern, Northwestern and southwestern parts of the study area. Specifically, it includes areas such as ‘Suba Menagesha Yemengist Den’, Wolmera Goro, area around Menagesh town, Menagesha Medhanealem, Suba and Elala Gojo, some parts of Intoto, Legedadi, Mount Yerer and Mount Furi. Small parts of the highly suitable areas, on the other hand, lie in the extreme parts of the southeastern part of the study area. For the moderately suitable areas, except, for few that are found in the southern parts of the study area, the rest are found nearby the highly suitable areas. The least suitable areas are found dispersedly in all part of the study area. Very least suitable areas, however, are rare in the Northern, North western and southwestern part of the study area. The southern part of the study area is dominated by very least suitable areas. Mon, 01 Jun 2009 00:00:00 GMT http://repository.hoarec.org:80/home/handle/123456789/64 2009-06-01T00:00:00Z