Instream Flow

Quick definition

Instream flow is the amount of water kept in a river or stream to protect ecological functions like fish habitat, temperature, and water quality.

What it means in practice

Withdrawals and diversions can reduce flows, warm the water, and shrink habitat. Instream flow protections set minimum targets or limits designed to maintain ecological function and avoid collapse during low-water periods.

Why it matters for rights of nature

Flow is the river’s lifeblood. Rights-of-nature frameworks often treat adequate flow as foundational to a river’s right to exist and flourish.

Related Terms

Balancing of Interests

Balancing of interests means nature’s interests are included and weighed as legally cognizable interests – without assuming nature automatically wins every conflict.

Beneficial Use

Beneficial use is a water-law principle that ties water rights to recognized uses, rather than allowing water to be hoarded.

Cause of Action

A cause of action is the specific legal claim that lets a court hear your case, what law was violated and what the plaintiff is entitled to ask for.

Declaratory Judgment

A declaratory judgment is a court decision that clarifies legal rights and duties, declaring what the law means and how it applies, without necessarily ordering immediate action.

Due Process

Due process is the legal requirement that government actions affecting rights follow fair procedures, and in some contexts, be substantively fair.

Duty of Care

A duty of care is a legal obligation to act reasonably to avoid causing foreseeable harm.

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