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  2. Water supply and sanitation in Ethiopia - Wikipedia

    en.wikipedia.org/wiki/Water_supply_and...

    The major river in Ethiopia is the Blue Nile. However, most drinking water in Ethiopia comes from ground water, not rivers. Ethiopia has 12 river basins with an annual runoff volume of 122 billion m 3 of water and an estimated 2.6–6.5 billion m 3 of ground water potential.

  3. Energy flow (ecology) - Wikipedia

    en.wikipedia.org/wiki/Energy_flow_(ecology)

    A graphic representation of energy transfer between trophic layers in an ecosystem. Energy flow is the flow of energy through living things within an ecosystem. [1] All living organisms can be organized into producers and consumers, and those producers and consumers can further be organized into a food chain.

  4. Hydrological model - Wikipedia

    en.wikipedia.org/wiki/Hydrological_model

    A hydrologic model is a simplification of a real-world system (e.g., surface water, soil water, wetland, groundwater, estuary) that aids in understanding, predicting, and managing water resources. Both the flow and quality of water are commonly studied using hydrologic models. MODFLOW, a computational groundwater flow model based on methods ...

  5. Standard step method - Wikipedia

    en.wikipedia.org/wiki/Standard_Step_Method

    A diagram showing the relationship for flow depth (y) and total Energy (E) for a given flow (Q). Note the location of critical flow, subcritical flow, and supercritical flow. The energy equation used for open channel flow computations is a simplification of the Bernoulli Equation (See Bernoulli Principle ), which takes into account pressure ...

  6. Dams and reservoirs in Ethiopia - Wikipedia

    en.wikipedia.org/.../Dams_and_reservoirs_in_Ethiopia

    It is not known exactly to what extent dams in Ethiopia would reduce the flow of water to Sudan and Ethiopia. Assuming an evaporation rate of 1 meter per year, an irrigated area of 200,000 hectares and a combined reservoir area of 1,000 km2, the flow of the Nile could be reduced by 3 billion cubic meters per year, equivalent to about 5 percent ...

  7. Energy systems language - Wikipedia

    en.wikipedia.org/wiki/Energy_Systems_Language

    Hence he used analog computers to make system models due to their intrinsic value; that is, the electronic circuits are of value for modelling natural systems which are assumed to obey the laws of energy flow, because, in themselves the circuits, like natural systems, also obey the known laws of energy flow, where the energy form is electrical ...

  8. Energy in Ethiopia - Wikipedia

    en.wikipedia.org/wiki/Energy_in_Ethiopia

    Energy in Ethiopia includes energy and electricity production, consumption, transport, exportation, and importation in the country of Ethiopia. Ethiopia's energy sector is crucial for its development, with wood being a primary energy source, leading to deforestation challenges. The country aims to address economic development and poverty by ...

  9. Water-energy nexus - Wikipedia

    en.wikipedia.org/wiki/Water-energy_nexus

    Hybrid Sankey diagram of 2011 U.S. interconnected water and energy flows. The water-energy nexus is the relationship between the water used for energy production, [1] including both electricity and sources of fuel such as oil and natural gas, and the energy consumed to extract, purify, deliver, heat/cool, treat and dispose of water (and wastewater) sometimes referred to as the energy intensity ...