Environment What Is An Ecosystem? An ecosystem is the sum of both the living biotic and nonliving abiotic components of a natural community.
As an ecosystem, widely Asals ecosystems, it includes freshwater rivers, reservoirs and lakesmarine oceans and seas and estuarine coastal, bays, tidal ecosystems. The Ethiopian aquatic ecosystem has high diversity areas such as major rivers and lakes that are of great national and international importance.
The country is well known for its richness in water potential. There are about 30 major lakes that are located in different ecological zones. These lakes are situated at altitudes ranging from about m below sea level high up to m.
However, the major lakes that are of economic importance are concentrated in the Rift Valley. The direction of river flows is dictated by the topography of the country.
Accordingly, the main drainage basins are flowing away from the rift system either towards the Nile System in the West or to the Indian Ocean in the Southeast.
For instance, Tekeze and Angereb rivers, the headwaters of Atbara, drain the plateaus north of Lake Tana; the Central plateau is drained by Blue Nile rising from the same Lake Tana Diddessa and Dabbus, rising in the high rainfall western regions being its main tributaries.
Asals ecosystems Wabishebele and Genale Dawa river watersheds drain the plateaus of the southeast to Indian Ocean. The rivers that flow in the rift system form closed basins, the Awash River being the largest which originates in the plateau of West of the Rift valley moving south of Addis Ababa northward into the closed Lake Abbe in the Afar Depression Tudorancea et al.
It is the largest lake in Ethiopia with total area of 3, hectares and with the maximum width and length of 67 and 75 km, respectively. The maximum depth is 14 m.
It is found in Amhara Regional State, and it includes 37 island many of them hosting ancient churches and monasteries. Filla, Grasses and Polygonum with other several aquatic pants including the water Lilly are present.
Those fed by perennial rivers which include lakes within the Rift Valley and those fed by the Awash River. Three closed basins presently represent these main Rift Lakes: Abbaya-Chamo- lies in the Southern part of the Rift Valley. Crater lakes The Crater lakes, particularly the Bishoftu, lie at an altitude of about masl.
They are found near the small town Bishoftu, at a distance of about 50 km Southeast of Addis. The crater lakes are generally circular in shape with surface areas ranging from 0.
They vary in maximum depth from 26 m Lake Kilote to 8. Similarity is observed between the Ethiopian Crater and Rift lakes and other East African waters regarding chemical composition Talling and Talling, They are alkaline; sodium, carbonate and bicarbonate ions being in high concentration; the pH value ranges from 9 to more than High Altitude Lakes Because of their Size and locations, the Ethiopian high mountain lakes are not much studied.
Lake Hayiq It is a crater lake located at about m. It is found in the Amhara Regional State, at the vicinity of the town of Dessie.
It was observed that the quality of the water has been changing Turdonacea et al.
This lake is unusually clean with transparency of 9 m and low productivity. It has a similar chemistry with other Ethiopian lakes especially with Lake Pawlos and Bishoftu crater lakes Tudorancea et al.
Lake Alemaya is another highland lake found in Oromiya Regional State. Loffler visited about fifteen lakes and ponds, including Lake Garba Guracha, located in the Bale Mountains at altitudes above masl.
According to Loffler Except Lake Garba Guracha that is a moronic lake located in the valley of a river, all of the lakes in this area are of glacial nature or were influenced by glacial activities.
These lakes are very shallow.Pentair is dedicated to excellence in all aspects of our business. Whether you need system design, technical service or unrivaled equipment-you can count on us. climate change adaptation, given the variability that characterizes the ecosystems.
Practices of communities living in the ASALs are seen to provide a basis for the design of climate adaptation.
Climate is considered a major factor in the natural processes and human activities in any ecosystem. Climate is a factor in surface runoff, soil moisture, soil development, ground water, vegetation type, species affect negatively the fragile ecosystems especially in the ASALs in terms of land carrying capacity, land.
Climatic Trends In. Mapping and valuing ecosystem services in the Ewaso Ng’iro Watershed. Polly Ericksen* 1, Mohammed Said, Jan de Leeuw, Silvia Silvestri, Lokman Zaibet, Indeed, ASALs, with 24 million hectares of land suitable for. 6 livestock production, are home to 80 percent of Kenya’s livestock, a resource valued at Ksh.
ASALs account for 70% of the land area of the countries in the Greater Horn of Africa. ASALs are a discrete geographic area in the Greater Horn of Africa where the population is vulnerable. The shared agro-ecosystem, including natural resources such as water and pastures and common production systems, offers an opportunity for cooperation .
6 Series No 2 Report 1: Kenya “Ending Drought Emergencies” Policy Review 2 Kenya’s Resilience Policy Framework There are two major drivers behind Kenya’s current policy framework supporting resilience in the ASALs.
The ﬁ rst is the recent devolution of governance to county level under the new Constitution introduced in