Hydrology — water balance

Each scenario screens the Blanchard River's low-flow capacity against the campus's consumptive cooling draw: live flow minus consumptive loss against the 7Q10 design low flow, and the assimilative headroom that remains. Live gauge and permit figures are grounded; scenario draws are labelled assumptions.

baseline

Current municipal loop, no data-center cooling draw.

Cooling model: no cooling-water load

Cooling demand: 0 MGD · consumptive fraction 0 fraction

Consumptive lossmodeled

0cfs

0 MGD x 0 consumptive (scenario baseline)

[inference]

Blanchard River 7Q10grounded

0.21cfs

Ohio EPA NPDES fact sheet 2PD00008*UD (Findlay WPCC, PN 205259, 2024-08-09), Table 12 'Instream Conditions and Discharger Flow', printed p. 28 — basis 'USGS Gages 04188300 and 04189000' (the 30Q10 rows cite 04188300 alone). Discharge location Blanchard River RM 56.42, HUC 04100008-03-04, Ohio EPA river code 04-160 (printed p. 7). Source: data/documents/oepa/findlay/2PD00008.fs.pdf; structured read data/extracted/oepa/findlay/2PD00008.fs.npdes.yaml.

[verified]

Binding dilutiongrounded

0.01:1

Findlay WPCC → Blanchard River (Findlay WPCC outfall, RM 56.42)

[verified]

Assimilative screen · 1 of 1 receiving reaches fail the dilution band at design low flow (Findlay WPCC chronic 0.01:1, acute 0.01:1). The design flow is matched to the criterion type — chronic aquatic-life dilution at the 7Q10, acute at the sharper 1Q10; the effluent-credited ratio counts the permitted effluent already in the reach. A screening band, not a permit determination.

Tier-0 water balance · 1 nodes · modeling caveats:

no abstraction node configured for site 'findlay'; the water balance omits the intake reach.