30 Questions
What is the estimated annual fish production in Ethiopian lakes?
31.5 tons
Which Ethiopian lake currently leads in fish potential production?
Lake Tana
What is the main threat to some of the Ethiopian lakes, according to the text?
Expansion of investments around lakes
What makes Ethiopian rivers and lakes important recreational and tourist attractions, according to the text?
Presence of hot springs around the lakes
What percentage of fish supplies in Ethiopian lakes come from the main Rift Valley lakes?
60%
Why is the value of Ethiopian rivers and lakes immense for scientific purposes?
Because they are natural habitats of a variety of wildlife
What is the primary reason for the reddish-brown color of Nitosols?
High concentration of iron (ferric) oxides
In which regions of Ethiopia are Acrisols typically found?
Some pockets of southwestern highlands with high rainfall
What is a distinctive feature of Vertisols when they are wet?
They have a high proportion of swelling clays
What is a major concern with Acrisols?
They have very low resilience to degradation
What type of rocks do Vertisols often develop on?
Igneous rocks such as volcanic plateau basalt
In which regions of Ethiopia are Vertisols commonly found?
In parts of Northwestern, Central and Southeastern highlands
What is natural vegetation referred to as?
A plant cover that develops with little or no human interference
What are the two main factors that affect the spatial distribution of natural vegetation in a region?
Temperature and precipitation
What is a major function of natural vegetation in an area?
To provide food and shelter
What type of plants are found in lowlands in Ethiopia?
Xeromorphic plants
What determines the characteristics of Ethiopia's natural vegetation?
Elevation and rainfall
What can natural vegetation help to minimize?
Soil erosion
What is the primary factor that causes a decrease in temperature with increasing elevation?
Changes in atmospheric pressure
How much does the temperature generally decrease per kilometer rise in altitude?
6.5°C
What type of lapse rate involves temperature changes due to internal processes of expansion and contraction, without the addition or withdrawal of heat?
Dry adiabatic lapse rate
In which layer of the atmosphere is the lapse rate limited to?
Troposphere
Which of the following factors does NOT cause a decrease in temperature with increasing elevation?
Increased distance from the equator
What happens to the volume of a mass of dry air at sea level if it rises to an altitude of about 18,000 ft (5486.22 meters)?
The volume is doubled
Which percentage of the earth's total surface is covered by water bodies?
71%
What percentage of the earth's total water surface is fresh water?
2.5%
Which topographical setup of Ethiopia contributes to the country's larger volume of ground and surface water?
Complex blend of massive highlands and rugged terrain
What is the estimated surface water potential of Ethiopia in billion cubic meters (BCM)?
124.4 BCM
Which of the following best describes Ethiopia's water coverage?
0.7 % of total land mass is covered by water bodies
Why is Ethiopia often referred to as the water tower of Eastern Africa?
Because of its relatively large surface water potential
Explore the fundamentals of water resources and drainage systems in Ethiopia and the Horn of Africa. Learn about the distribution and importance of freshwater, as well as the different types of water bodies. Dive into the challenges and opportunities related to managing water resources in the region.
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