#upstream

• Upstream — The upper sector of a watercourse, located towards the source, relative to a given reference point; the direction opposite to the water flow. Often used in hydraulic engineering and ecology to describe the location of structures or phenomena situated upstream.
• Upstream — Upstream, toward the sources of a watercourse; in the direction opposite to the water flow. As a noun, it designates the upper reach of a river relative to a fixed point of observation. Figuratively or economically, it describes the initial phases within a supply chain or industrial process.
• Upstream — A regional adverbial form used in certain mountainous areas to indicate the direction towards the mountain crest, up the slope, or towards the headwaters of a river. It functions as an antonym for the terms 'avale' or 'ajos', being a spatial orientation element specific to shepherding and lumberjack communities.