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Presenters explain how LSPC models natural, reservoir and groundwater impacts on river flows
Summary
In a technical Q&A, presenters said LSPC estimates "natural" flow by modeling watershed hydrology while explicitly including human impacts (diversions, reservoirs); they described reservoir modules, optional coupling with MODFLOW for groundwater, and plans to recalibrate when new data arrive.
Presenters at a public LSPC Q&A described how the Local-Scale Process-based Conceptual (LSPC) modeling framework simulates river flows and accounts for human impacts.
A participant asked what is meant by "natural" or unimpaired flow. Speaker 4 said natural flow is the amount of flow expected in a river "without any impact from human activities, such as diversion or creating reservoir," but added that “it’s hard to find any watershed in California that has a natural flow,” so the team calibrates models using observed conditions that include diversions and reservoir effects.
On reservoirs, the presenters said LSPC has a reservoir module…
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