noun
reserves; potential capacity
Technical term used in energy and resource contexts for the estimated total amount of a resource that exists in a given area, whether extractable (oil, gas) or harnessable (wind, solar).
日本の風力発電の賦存量は大きいが、実際の開発は進んでいない。
Japan's potential capacity for wind power is large, but actual development has not progressed.
この地域の天然ガスの賦存量はまだ正確に把握されていない。
The reserves of natural gas in this region have not yet been accurately assessed.
資源量 is a more general term for resource quantity, not necessarily implying a technical estimate like 賦存量.
Compound of 賦 (allotment, distribution) and 存 (existence) + 量 (quantity). The exact derivation is uncertain, but the term is used in modern technical contexts for resource potential.