Columbia subject headings:
Climatic changes--Nile River Watershed.
Ecohydrology--Nile River Watershed.
Nile River Watershed--Environmental conditions.
Water-supply--Nile River Watershed.
Harvard subject headings:
Climatic changes--Nile River Watershed.
Ecohydrology--Nile River Watershed.
Nile River Watershed--Environmental conditions.
Water-supply--Nile River Watershed.
Princeton subject headings:
Climatic changes--Nile River Watershed.
Ecohydrology--Nile River Watershed.
Water-supply--Nile River Watershed.