1 · Choose a hydrograph
Four fictional river regimes have the same annual reference volume at a given mean flow. Change availability separately to explore drought without silently changing the reference.
Also rescales the flow coordinates of the synthetic habitat study. Pattern and availability changes leave that study fixed.
Applied after reference construction; no reservoir or allocation rerun.
Higher exceedance means a drier annual class. The shift uses a drier class’s magnitude and seasonal shape, following the report’s interim reading.
Teaching playground, not adopted prescriptions. The report’s proposed entry table is unadopted; baseline inputs and habitat criteria still need definition or evidence. Here those gaps are filled with disclosed synthetic inputs. A numerical result does not make a method ready for official use.
2 · Explore the method assumptions
Scales a continuous, concave illustrative table. This is neither the Swiss statutory table nor an adopted Uzbek table.
An explicit synthetic daily operand. No multi-day average is converted into a daily floor.
Target on an invented 0–1 suitability scale. The curves peak at 0.90; higher targets are unavailable. The score is not ecological status, survival probability or habitat area.
Swiss-derived entry gives a floor. Kazakh-style baseline assembles a seasonal regime. Top tier assumes an eligible priority reach and a hypothetical site study. More data alone does not select this tier. It is not a percentage uplift of the baseline.
Try a question
Each experiment loads a reproducible starting point. Make a prediction, then change one control.
3 · Compare requirements with available flow
Quantity-only educational calculations, before quality adjustments and basin allocation. This page illustrates method structure alongside the TaqSim–Fishy basin explorer; it does not call Fishy’s production requirement APIs. Hover to inspect daily values. Requirements are not clipped to available water: unmet volumes stay visible.
Try an experiment: predict what will change, then use the controls to check. Compare seasonal fit and evidence as well as annual volume.
Shortfall compares each requirement with available flow, before other demands. It is not an agricultural deficit or a prediction of ecological damage. Ecological status remains unassessed. A higher tier means more site-specific evidence; its computed water requirement is not necessarily larger.
Compare all four inflow patterns
The current annual mean, availability factor and method settings apply to every row. Seasonal shape changes; annual reference volume stays equal. The same synthetic habitat study is held fixed across patterns. Values cover one complete 365-day design year.
| Hydrograph / method | Required · million m³ | Unmet · million m³ | Shortfall days |
|---|
Inspect the calculation · operands, habitat curves and seasonal results
Swiss-derived entry
| Table breakpoint · m³/s | Floor at breakpoint | Marginal rate |
|---|
Kazakh-style assembly
Shift annual magnitude and shape once. Take the maximum of the shifted class hydrograph, 99% bound, supplied daily low-flow bound and record minimum. A crossing above the median hydrograph makes this example unavailable. The median cap applies only to the class component; it is inert under the strict crossing test.
Winter provision and spawning correction are not computed: their prerequisites are absent. No automatic fallback value is substituted.
Top tier: inspect the hypothetical habitat study
The selected flow is the lowest flow on the rising limb that reaches the chosen target. Different seasonal curves give different requirements. This single habitat element illustrates one part of a top-tier study; it is not a complete holistic assessment.
| Method | Dec–Feb · m³/s | Mar–May · m³/s | Jun–Aug · m³/s | Sep–Nov · m³/s |
|---|
Synthetic record and method provenance
Source of method structure: project report, Appendix A step 7 and Part II method summaries. These are report-aligned educational calculations implemented for this page; they are not claimed as calls to Fishy’s production requirement APIs. The basin explorer separately demonstrates Fishy’s physical criterion assessments.